• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    There is disclosed a photographic stitching apparatus (1), the photographic stitching apparatus (1) comprising: a recording unit interface for operably coupling to a recording unit (2). The recording unit interface defines an offset axis (A'). The recording unit interface is rotatable about an axis of rotation (A) advantageously arranged substantially free of play. The offset axis (A ') is parallel to and radially offset from the axis of rotation (A). There is further disclosed a photographic recording apparatus and a photographic apparatus having a stitching device. Also disclosed is a method of recording a photographic image, the method including capturing sub-images.
    公开号:CH710286A2
    申请号:CH01645/14
    申请日:2014-10-27
    公开日:2016-04-29
    发明作者:Oldani André；Capaul-Weber Thomas
    申请人:Alpa Capaul & Weber Ag；
    IPC主号:
    专利说明:

    Technical area
    The present invention is in the field of apparatus and methods for recording photographic images. It is particularly in the field of recording photographic images by recording a series of sub-images.
    background
    During recent years, digital photographic systems and devices having sensor arrays of e.g. 24 mm x 36 mm (full size) and beyond the full format as well as smaller image sensors with high image quality become available. Particularly in the professional and semi-professional field, the demand for high-resolution and high-quality images has increased significantly, a trend that continues. As a general rule, both a large number of image pixels and a large sensor array are desired.
    Summary of the Revelation
    With increasing sensor size, the corresponding devices are relatively expensive, bulky and difficult to handle. In addition, they technically become obsolete within a short time. For static object recording, therefore, attempts have been made to use a comparatively small image sensor and to sequentially record a number of sub-images. Between the recording of the partial images, a recording unit with the image sensor in the image plane within the area bounded by the image circle of the lens is moved to different positions. When combined, the sensor fields in the various positions form a larger "virtual" sensor field. After recording, the sub-images can be combined using stitching techniques. However, the devices available for moving the image sensor are relatively complex and inconvenient to use, and typically require changes in the mechanical structure between the recording of the sub-images.
    It is a general object of the present invention to provide advanced apparatus and methods for recording photographic images, particularly sub-images, as previously discussed. A particular object of the present invention is to provide apparatus and methods which at least partially obviate the shortcomings of the prior art.
    The general object is achieved by the subject matter of the independent claims. Particularly favorable and exemplary embodiments are defined as a whole by the dependent claims and the disclosed embodiments.
    According to a first aspect, the general object is achieved by providing a photographic stitching device. The photographic stitching apparatus comprises a recording unit interface for operatively coupling to a recording unit. The recording unit interface defines an offset axis. The recording unit interface is furthermore arranged around an axis of rotation, preferably substantially free of play. The offset axis is parallel to and offset from the axis of rotation.
    A photographic stitching device according to the present disclosure can be realized in a particularly compact manner and with a small number of components.
    The photographic stitching device may be configured for manual and / or automatic rotation of the recording unit interface.
    In an assembled or working condition, since the recording unit is generally rigidly coupled to the recording unit interface, rotation about the rotation axis is associated with movement of the recording unit interface in a plane normal to the rotation axis.
    In an assembled and working state of a photographic construction, the offset axis coincides with the optical axis of the recording unit and crosses the (typically rectangular or square) sensor array vertically and centered. The offset axis further generally intersects a plane defined by the recording unit interface, for example a bayonet, perpendicular and centered. In any case, the design of the recording unit interface defines and guarantees a defined position and orientation of an attached recording unit and its image sensor with respect to the offset axis.
    The optical axis of the lens used for recording the fields falls - in a standard structure - together with the axis of rotation or is compared to the axis of rotation in a defined manner, for example for the purpose of perspective correction, inclined and / or moved.
    In any case, the photographic stitching device is designed such that in the application, a continuous optical path through the photographic stitching device from the lens, which is arranged on a front side of the photographic stitching device, to the image sensor of a recording unit, which an opposite back of the photographic stitching device is present.
    In this document, the terms "front" or "front" and "back" or "back" are used as directional displays as follows: Assuming a generally linear optical path, the direction from "front" to "is" Back »the direction from the lens to the image sensor. Accordingly, the lens is the most frontmost element within the optical path, while the image sensor is the rearmost element.
    In particular, this type of design allows moving the recording unit with the image sensor to the required positions for recording the individual partial images by rotation only about a single axis of rotation without moving or otherwise moving the recording unit. Furthermore, no change or modification of the mechanical structure for recording the individual partial images is required.
    As will be discussed in more detail below, the orientation of the sub-images recorded in the various rotational positions of the recording unit interface have different orientations for some types of embodiments. In alternative embodiments, the recording unit interface may be configured to rotate additionally about the offset axis. By rotating, rotating the recording unit interface about the rotation axis, the recording unit interface by the same angle about the offset axis in a reverse direction, the orientation of the recording unit interface for recording the individual fields can be kept constant. For this type of embodiment, the rotation of the recording unit interface about the offset axis may be independent of the rotation about the rotation axis and / or the rotation of the recording unit interface about the rotation axis or the offset axis are kinematically coupled. However, embodiments in which the orientation of the recording unit interface is kept constant are more complex.
    In some embodiments, the recording unit interface is configured to detachably mount the recording unit, thereby providing a releasable operative coupling. For this type of embodiment, the photographic stitching device may be provided as a separate device and designed to be coupled to a commercially available camera body as a recording unit. Such a camera body may have a full format image sensor or an image sensor of a different format, such as APS-C (with a sensor area of about two thirds of a full format sensor) or a half format sensor, for example, the Micro Four Thirds (MFT) standard. Recording units with other types of sensors, e.g. Image sensors with a square sensor array and / or recording units with sensors that exceed full-frame size can also be used. The recording unit can also be a so-called "back part" which includes an image sensor but no shutter. Such backs are available from a number of suppliers and are often used in modular and professional photo systems.
    In further embodiments, the photographic stitching device and the recording unit are realized as an integral combined assembly or device.
    In some typical embodiments, the recording unit comprises a shutter, for example a focal plane shutter. Alternatively or additionally, a closure of any desired type may be located at the desired position of the optical path, including a central shutter which may be an integral part of the objective. A shutter separate from the recording unit may be used, in particular, when the recording unit is a "back part", as previously discussed, which typically does not itself include a shutter. Alternatively, or in addition to a shutter disposed in the optical path, the shutter may be an electronic shutter with no moving parts, which can be realized by a corresponding control and a corresponding readout of the image sensor. The term "closure" is accordingly functional rather than necessarily structural.
    In some embodiments, the photographic stitching device further comprises a locking structure, wherein the locking structure locks the recording unit interface relative to the axis of rotation in a predefined locking position, advantageously with a step angle of 90 ° or 180 ° between adjacent locking positions. Such a locking arrangement improves the precision and convenience during use. A locking structure is particularly useful for embodiments in which the recording unit interface is manually rotated.
    In addition or as an alternative to a locking structure, a locking structure may be provided which - in an engaged state - locks the recording unit interface with respect to the axis of rotation and requires dedicated user action to be unlocked or enabled.
    In some embodiments, the photographic stitching device comprises a base body and a rotary body. The base body has a continuous base body cutout with a circular cross section. An axial axis of symmetry of the base body section defines the axis of rotation and coincides with it. The rotary body has a cylindrical lateral surface and is rotatably arranged around the rotational axis in the base body cutout, preferably substantially free of play. The rotary body further comprises or carries the recording unit interface, typically in the form of a bayonet or screw mount. This type of embodiment can be made particularly compact so that it can be used in combination with an available general purpose photographic apparatus. However, the specific type of design is not essential and may be modified and / or varied according to common knowledge.
    In some embodiments of this general type of embodiment, the base body and the rotary body are substantially disc-shaped. This type of embodiment is particularly compact and will be discussed in more detail by way of specific examples.
    In some embodiments, the axis of rotation crosses a sensor field of the image sensor at a point on an axis of symmetry of the sensor array when the recording unit is operatively coupled to the stitching device. Such an axis of symmetry may, in particular, be an axis of symmetry that bisects one of the longer or shorter sides of a rectangular sensor array. As will be discussed in more detail below, this type of embodiment is particularly suitable for generating an end image having two sub-images and rotating the recording unit with the image sensor about the axis of rotation by 180 ° between the recording of the sub-images.
    In further embodiments, the axis of rotation crosses a sensor field of the image sensor at a point that is not on an axis of symmetry of the sensor array when the recording unit is operatively coupled to the stitching device. As will be discussed in more detail below, this type of embodiment is particularly suitable for generating an end image with four sub-images and a rotation of the recording unit with the image sensor about the axis of rotation by 90 ° between the recording of adjacent sub-images. The point at which the axis of rotation crosses the sensor field is advantageously chosen so that the combined "virtual" sensor field of the four fields is a square, with the corners of the square lying on or slightly within the image circle.
    The axis of rotation generally crosses the plane of the image sensor within the sensor array, resulting in some overlap between the sub-images, as discussed in more detail below in the context of embodiments. A limiting case exists when the axis of rotation crosses the plane of the image sensor at a point that lies on an edge of the sensor field. An axis of rotation crossing the plane of the image sensor at a point outside the sensor field would result in a "gap" between the sub-images.
    In another aspect, the general object is achieved by providing a photographic recording apparatus. The photographic recording device comprises a photographic stitching device as previously discussed and / or discussed below. The photographic recording apparatus further comprises a recording unit having an image sensor. The recording unit is designed for operative coupling to the recording unit interface. An optical image sensor axis coincides with the offset axis when the recording unit is operatively coupled to the stitching device.
    The optical image sensor axis is defined by the design of the recording unit. In a typical camera housing with a bayonet mount, the optical image sensor axis is perpendicular through the bayonet and center of the (typically, but not necessarily rectangular) image field of the image sensor. However, as mentioned above, the photographic stitching device and the recording unit may alternatively be realized in an integral manner and / or otherwise coupled and, for example, enclosed by a common housing. Furthermore, the recording unit may be a "back part", as explained above.
    According to yet another aspect, the general object is achieved by providing a photographic device. The photographic apparatus comprises a photographic stitching device as previously discussed and / or discussed below, or a photographic recording apparatus as discussed above and / or discussed below. The photographic apparatus further comprises an objective and / or a lens interface for the detachable and advantageously substantially backlash-free operative coupling of the photographic stitching device with an objective.
    For example, in embodiments with a dedicated lens interface, the lens interface may be a bayonet or screw mount, as well known in the art. Alternatively, the lens interface may be a proprietary special lens interface. The lens interface may be further configured for direct operative coupling with the lens, or may be configured for coupling via an interface such as, for example, a disc-shaped lens carrier, as discussed in greater detail below. In such embodiments, the lens interface of the photographic device couples to the lens mount while the lens mount is releasably or non-detachably coupled to the lens.
    In alternative embodiments, the lens, the lens interface and the photographic stitching device form an integral unit with no releasable coupling.
    In some embodiments of the photographic device, the photographic device comprises an intermediate structure. In an assembled state of such embodiments, the intermediate structure is disposed between the lens or the lens interface on the front side and the photographic stitching device on the back side. The intermediate structure may include a photographic stitching device interface for releasably and advantageously mouning substantially free of play with the photographic stitching device.
    The intermediate structure may, for example, have the shape of a square frame. The photographic stitching device interface and the disc-shaped lens interface may be disposed on the opposite open sides of the frame. The photographic stitching device and a lens may have at least in an interface area a substantially square outer contour corresponding to the contour of the photographic stitching device interface and allow the interface area of the photographic stitching device and the lens to be at least partially separated from each other inserted or otherwise coupled to opposite sides of the intermediate structure. For a frame-type intermediate structure, a longitudinal axis of symmetry of the frame may coincide with the axis of rotation.
    In general, the intermediate structure ensures correct relative alignment of the lens and the photographic stitching device, and further adjusts the distance between the lens and the image sensor of the recording unit to the required investment mass.
    In some embodiments having an intermediate structure, the photographic stitching device interface and the lens interface may have identical geometry.
    The intermediate structure may optionally be designed for coupling to the lens and / or the photographic stitching device via further optical devices such as a tilt and / or shift unit, as are commonly used for perspective corrections. Such other optical devices may also form and / or serve as an integral part of the intermediate structure.
    In other embodiments, there is no dedicated intermediate structure in the form of a frame or the like, but the lens and the photographic stitching device with the attached recording unit are directly and separately coupled, for example, to a common device housing.
    In alternative embodiments, the lens, the lens interface, and the photographic stitching device form an integral unit with no releasable coupling.
    In some embodiments of the photographic apparatus, a sensor array of the image sensor of the recording unit is within a range bounded by an image circle of the lens for at least two different rotational positions of the recording unit interface relative to the axis of rotation. For this type of embodiment, the full sensor field of all recorded fields may be used to generate the final image. Typically, the sensor field of the image sensor is within the range bounded by the image circle for all rotational positions of the recording unit interface relative to the axis of rotation.
    According to still another aspect, the general object is achieved by providing a method of producing a photographic image. The procedure includes the following steps:<tb> a) <SEP> providing an objective and an image sensor in an initial configuration, wherein an image sensor optical axis is parallel to and radially offset from an axis of rotation;<tb> b) <SEP> recording a first field in the initial configuration;<tb> c) <SEP> rotating the image sensor relative to the lens by a given step angle about the axis of rotation from the optical axis of the initial configuration to a first rotated configuration;<tb> d) <SEP> Record a second field in the first rotated configuration.
    In some embodiments of the method, the method further includes the following steps:<tb> e) <SEP> rotating the image sensor relative to the objective by the step angle about the axis of rotation from the first rotated configuration to a second rotated configuration;<tb> f) <SEP> recording a third field in the second rotated configuration;<tb> g) <SEP> Rotating the image sensor relative to the objective by the step angle around the front optical axis from the second rotated configuration to a third rotated configuration;<tb> h) <SEP> Record a fourth field in the third rotated configuration.
    In some embodiments of the method, the step or steps of rotating the image sensor relative to the objective are performed via a photographic stitching device, a photographic recording device, and / or a photographic device, as discussed above and / or below.
    In embodiments in which only two partial images are recorded, the step angle can be in particular 180 °. In embodiments, recorded at four fields, the step angle may be in particular 90 °.
    Further aspects of different variants of the method will be discussed below in the context of embodiments.
    [0044] Exemplary embodiments
    Hereinafter, embodiments according to the present disclosure will be discussed in more detail with additional reference to the figures.<Tb> FIG. 1 <SEP> shows an exemplary photographic device in a schematic structural view;<Tb> FIG. Figures 2a-2c show an exemplary photographic stitching device in schematic front and cross-sectional views;<Tb> FIG. 3 <SEP> is a schematic view of an image circle for an example construction;<Tb> FIG. 4 <SEP> is a schematic view of an image circle for another exemplary construction;<Tb> FIG. Figs. 5a-5d <SEP> are schematic views of an image circle for another exemplary construction;<Tb> FIG. FIGS. 6a-6d <SEP> are schematic views of an image circuit for another exemplary structure similar to the structure of FIGS. 5a-5d.
    In these documents, directional expressions such as "top," "bottom," "left," "right," "portrait," or "landscape" are used with reference to the drawings to assist the reader's understanding. They do not imply special directions or orientations during use.
    Hereinafter, reference is first made to Fig. 1. Fig. 1 shows a photographic device according to the present disclosure in a schematic side view, wherein the front and rear direction for illustrative purposes with the letters "F" and "R" are displayed.
    The photographic device shown comprises a photographic stitching device 1 having a mounted and thereby operatively coupled recording unit 2 with an image sensor 22. The photographic stitching device 1 and the recording unit 2 constitute - in combination - a photographic recording device as defined above. The photographic apparatus further comprises a lens interface 3 to which a photographic lens 4 is coupled.
    The photographic apparatus of Fig. 1 further comprises a frame 5 as an intermediate structure. The frame 5 has, for example, a substantially square cross-section. At its opposite front and back side, the frame 5 has exemplary identical coupling structures which serve as a photographic stitching device interface or objective interface 3. The frame 5 is disposed between the lens 4 and the photographic stitching device 1 and mechanically and optically couples the photographic stitching device interface and the lens.
    The lens 4 comprises by way of example a bayonet or screw holder, which is coupled, for example, to a square and disk-shaped lens carrier (without reference), which has a corresponding counter-bayonet mount or counter-screw mount. The scope of the lens carrier is designed to operatively couple to the lens interface 3 of the frame 5.
    Via the operative coupling with the photographic stitching device 1 and the objective 4, the frame 5 holds the photographic stitching device 1 and the objective 4 in a parallel orientation and with a contact mass as required by the design of the objective 4. The frame 5 may include stops, not shown, as part of the interface structure against which the photographic stitching device 1 and the lens carrier with the lens 4 can be releasably locked in proper alignment and spacing via detents, pawls, or the like.
    In variants, the design of the photographic stitching device interface and / or the lens interface 3 may be different. For example, the lens interface can be implemented directly as a counter bayonet mount or counter screw mount of the lens 4 without a separate dedicated lens mount. In addition, the lens carrier can be integrally formed with the lens 4 without bayonet or Schraubhalterungskopplung.
    The arrangement of Fig. 1 is a standard structure where the optical axis of the objective 4 coincides with the axis of rotation A. However, this is not essential. A tilt and / or shift device may be disposed in the optical paths for translating and / or tilting the objective optical axis relative to the axis of rotation A, which is particularly useful for perspective corrections.
    In the following, reference is also made to FIGS. 2a, 2b. Fig. 2a is a schematic front view of the photographic stitching device 1; Fig. 2b shows schematically a corresponding schematic sectional view.
    The photographic stitching device 1 comprises a base body 10 having a general shape of an exemplary square disk and adapted for operative coupling to a photographic stitching device interface of the frame 5 as previously described with reference to FIG is.
    The base body 10 has a circular cutout 11, which is designed for the rotatable and substantially play-free recording of a rotational body 12, so that the rotational body 12 can rotate within the base body 10 perpendicular to the axis of rotation A. The center of rotation of the rotary body 12 within the base body 10 is given by the rotation axis A. Axially, the rotational body 12 is fixed relative to the base body 10.
    The rotary body 12 has a recording unit interface 13, which is exemplified by a circular opening or a continuous cutout, and an interface structure for the recording unit 2, which is exemplified by a not shown bayonet corresponding to a bayonet of the recording unit 1 , The center of the recording unit interface 13 is defined by the offset axis A and, in operation, is aligned with the optical axis of the recording unit 1. The centers of the cutout 11 in the base body 10 and the center of the recording unit interface 13 - and correspondingly the rotation axis A and the offset axis A - are offset from each other by a distance d as indicated. The distance d is also a measure of the eccentricity of the recording unit interface 13 with the recording unit 2 relative to the axis of rotation A during rotation of the rotary body 12.
    In other embodiments, the interface structure is different from a bayonet. The interface structure may be designed in particular for coupling with a "back part", as described above and commercially available.
    In variants, the section of the recording unit interface 13 is not circular, but has another, for example, square or rectangular plan. Such a floor plan may in particular be used if the recording unit is a "back part" which is not mounted by rotation along a longitudinal axis. A "back part" as an image recording unit is typically mounted via a linear movement and / or a tilting movement. In any case, the cutout is sufficiently large so as not to cut the beam from the objective 4 to the image sensor 22.
    Preferably, the photographic stitching device 1 further comprises a locking structure, not shown, which locks the rotary body 12 relative to the base body 10 and, accordingly, relative to the axis of rotation A at a predefined step angle of 90 ° or 180 °, as will be explained in greater detail below.
    The photographic stitching device 1 may be designed for rotation of the rotary body 12 within the main body 10 manually and / or via a corresponding drive such as a not-shown electric motor.
    In the following, reference is also made to FIG. 2c. Fig. 2c is similar to Fig. 2a. In comparison to FIG. 2 a, however, the rotary body 12 has been rotated relative to the base body 10 by an exemplary step angle of 90 °.
    It should also be noted that in the embodiment of Figs. 2a to 2c, the recording unit interface 13 is an integral part of the rotary body 12 or rigidly mounted on the rotary body 12. When rotating the rotary body 12, the recording unit interface 13 and the attached recording unit 2 change their orientation accordingly. In alternative embodiments, as explained above, the recording unit interface 13 and the rotary body 12 may be designed for an additional rotation of the recording unit interface 13 relative to the rotary body 12 about the offset axis A. In this way, the orientation of the recording unit 2 can be maintained to be constant.
    In order to explain the operation of an embodiment according to the present disclosure, reference is additionally made to FIG. 3. Fig. 3 shows a view of the image circle 40 of the objective 4 in the plane of the image sensor 22 of the recording unit 2 together with the rectangular sensor array 20-1 and 20-2, respectively. As in the following examples, it is assumed that the image sensor 22 of the recording unit 2 is rectangular and has an exemplary aspect ratio (width to height) of 3: 2.
    In the example shown in Fig. 3, the rotary body 12 and, accordingly, the recording unit 2 can be locked in two alternative working configurations. In the first or initial configuration, the sensor panel is shown as a solid rectangle 20-1. In the second or rotated configuration, the sensor field is shown as a dashed rectangle 20-2. The corresponding centers of the sensor field are indicated by C-1 and K-2, respectively. In an assembled state where the recording unit 2 is mounted on the photographic stitching device 1, the offset axis A is aligned with the optical sensor axis and extends perpendicularly through C-1 and C-2, respectively. The distance d is - depending on the lens 4 and the field of the image sensor 22 of the recording unit 1 - chosen such that the outer corners of the sensor array 20-1 or 20-2 were within a range which is limited by the image circuit 40 , For a full utilization of the image circle of the lens 4, the corner lie on the image circle.
    The center of rotation (in this example corresponding to the center of the image circle 40) is given by the rotation axis A. It can be seen that the axis of rotation A crosses the sensor field 20-1 or 20-2 at a point on an axis of symmetry of the sensor field, which halves the longer sides of the rectangular sensor field. It can also be seen that the center of the rotation is close to the inner edge of the sensor array 20-1, 20-2, but offset slightly to the inside of the sensor areas 20-1, 20-2, respectively. A vertical overlap belt 21 exists between the two sensor arrays 20-1 and 20-2, respectively.
    It is now assumed that a first partial image is recorded in a configuration in which the sensor field is defined by rectangle 20-1, and a second partial image is recorded in a configuration in which the sensor field is defined by rectangle 20-2 is.
    It can be seen that the first and second partial image - while neglecting the overlap band 21 - lie substantially side by side. This combined "virtual" sensor array is defined by the combined perimeter of the sensor arrays 20-1 and 20-2, respectively. Again, ignoring the overlap of the overlap band 21, this combined image area corresponds to the sensor array of a "virtual" sensor that is twice the size of the actual physical sensor array of the recording unit 2 and twice the number of pixels. It can also be seen that the orientation of the combined "virtual" sensor array, as previously discussed, is rotated 90 degrees as compared to the physical sensor arrays 20-1, 20-2. In the example shown, where the orientation of the physical sensor arrays 20-1, 20-2 is of the "vertical format" type, the "virtual" sensor field is of the "landscape format" type. Another feature of the recorded images is that the second field is upside down compared to the first field.
    The first and second sub-images may be combined into one final image by rotating either one of the first and second sub-images by 180 °, resulting in both sub-images having an identical orientation, then applying a stitching algorithm. For stitching, the overlap present in the overlap band 21 can be used for precise alignment of the two fields.
    In the following, reference is also made to FIG. 4. FIG. 4 shows an embodiment that is generally similar to the embodiment of FIG. 3, as previously discussed. However, in contrast to the embodiment of Fig. 3, the axis of rotation A intersects the sensor array 20-1 and 20-2, respectively, at a point on an axis of symmetry of the sensor array which bisects the shorter sides of the sensor array. As in the previously discussed example, the distance d is adjusted so that the resulting "virtual" sensor field is within the range bounded by the image circle 40. The resulting "virtual" sensor array is of the "landscape" type and, unlike the example of FIG. 3, has the same orientation as the sensor arrays 20-1, 20-2 of the first and second sub-images. The aspect ratio is larger and panoramic. Assuming that the objective 4 and the recording unit 2 are identical to the example of FIG. 3, it can be seen that the width of the overlap band 21 is considerably larger.
    Reference will now also be made to Figs. 5a to 5d, which show a further embodiment according to the present disclosure. In the embodiment of FIGS. 5a to 5d, the rotary member 12 can be locked to the recording unit 2 in four rotational positions with a step angle of 90 ° and corresponding sensor fields 20-1, 20-2, 20-3 and 20-4, respectively. The distance d is chosen such that the resulting "virtual" sensor field is a square with edges that are within the range bounded by the image 40 or fall on the image circle 40.
    Figs. 5a to 5d show the situation when recording the four partial images, with the sensor fields being referenced as 20-1, 20-2, 20-3, 20-4. To record each of the fields, the corresponding center C-1, C-2, C-3, C-4 of the sensor array is located on the offset axis A. The four centers C-1, C-2, C-3, C-4 continue to lie on a common circle with radius d, with the center of the circle lying on the axis of rotation A. For the sake of clarity, one of the sensor arrays 20-1, 20-2, 20-3, 20-4 is shown in solid lines in each of FIGS. 5a to 5d, while the others are shown in dashed lines.
    With this type of structure, a quadratic end image consisting of four partial images can be generated. As in the previously discussed examples, the final image can be obtained by rotating the sub-images to a common orientation with a subsequent stitching process. It should be noted that, for this type of arrangement, the resulting final image is always square regardless of the aspect ratio of the image sensor 22 and the individual partial images.
    For reasons of clarity only, the axis of rotation A crosses the sensor field plane at a point located on a longer edge of the rectangular sensor array. This arrangement results in the sensor fields 20-1, 20-2, 20-3, 20-4 being partially "edge to edge" without overlapping. In practical application, the distance d is chosen to be slightly smaller, which causes the axis of rotation to cross the sensor field within the sensor field rather than on its edge. Although the "virtual" sensor field is somewhat reduced, the overlap resulting from this measure is favorable for subsequent stitching and reduces the requirements for mechanical precision and alignment.
    FIGS. 6a to 6d generally correspond to FIGS. 5a to 5d. In Figs. 6a to 6d, however, the distance d is slightly smaller and the axis of rotation A correspondingly crosses the image sensor plane within the image field of the image sensor 22 rather than on its edge, resulting in an overlap, as previously explained.
    权利要求:
    Claims (14)
    [1]
    A photographic stitching device (1), wherein the photographic stitching device (1) comprises:a recording unit interface (13) for operative coupling witha recording unit (2),the recording unit interface (13) defining an offset axis (A),wherein the recording unit interface (13) rotation axis (A) is arranged, preferably substantially free of play,wherein the offset axis (A) is arranged parallel to and radially offset from the axis of rotation (A).
    [2]
    The photographic stitching apparatus (1) according to claim 1, wherein the recording unit interface (13) is adapted to detachably mount the recording unit (2), whereby a releasable operative coupling is established.
    [3]
    The photographic stitching device (1) of any preceding claim, wherein the photographic stitching device (1) further comprises a locking structure, the locking structure locking the recording unit interface (13) relative to the rotation axis (A) in a predefined locking position , preferably with a step angle of 90 ° or 180 ° between adjacent locking positions.
    [4]
    The photographic stitching device (1) according to any one of the preceding claims, wherein the photographic stitching device (1) comprises:- A base body (10), wherein the base body (10) has a base body cutout (11) having a circular cross-section, wherein an axial axis of symmetry of the base body section (11) defines the axis of rotation (A) and coincides with it, and- A rotary body (12), wherein the rotary body (12) has a cylindrical side surface and is rotatable about the rotation axis (A) in the base body cutout preferably arranged substantially free of play, wherein the rotary body (12) comprises the recording unit interface (13) or carries.
    [5]
    5. A photographic stitching device (1) according to claim 4, wherein the base body (10) and the rotary body (12) are substantially disc-shaped.
    [6]
    6. The photographic stitching device (1) according to one of the preceding claims, wherein the rotation axis (A) a sensor field (20-1, 20-2) of an image sensor (22) at a point on an axis of symmetry of the sensor field (20-1, 20-2) when the recording unit (2) is operatively coupled to the stitching device (1).
    [7]
    7. A photographic stitching device (1) according to any one of claim 1 to claim 5, wherein the rotation axis (A) a sensor array (20-1, 20-2, 20-3, 20-4) of an image sensor (22) in one Point that does not lie on an axis of symmetry of the sensor array (20-1, 20-2, 20-3, 20-4) when the recording unit is operatively coupled to the stitching device.
    [8]
    8. A photographic recording apparatus, wherein the photographic recording apparatus comprises:- A photographic stitching device (1) according to any one of the preceding claims, andA recording unit (2) having an image sensor (22), the recording unit (2) being designed for operative coupling to the recording unit interface (13),wherein an optical image sensor axis coincides with the offset axis if the recording unit (2) is operatively coupled to the stitching device (1).
    [9]
    9. A photographic device, the photographic device comprising:A photographic stitching apparatus (1) according to any one of claims 1 to 7 or a photographic recording apparatus according to claim 8,- A lens and / or a lens interface (3) for releasably and Favor essentially play-free operative coupling of the photographic device (1) with a lens (4).
    [10]
    A photographic apparatus according to claim 9, wherein said photographic apparatus comprises an intermediate structure (5), said intermediate structure (5) being disposed in an assembled state between said objective or said objective interface (3) and said photographic stitching apparatus (1). wherein the intermediate structure (5) comprises a photographic stitching device interface for releasably and preferably substantially free of play operative coupling of the intermediate structure with the photographic stitching device (1) and the objective or the objective interface (3).
    [11]
    11. A photographic apparatus according to claim 9 or claim 10, wherein in an assembled state, a sensor array (20-1, 20-2, 20-3, 20-4) of the image sensor (22) of the recording unit (2) is within a range which is bounded by an image circle (40) of the objective (4) for at least two different rotational positions of the recording unit interface (13) relative to the axis of rotation (A).
    [12]
    12. A method of producing a photographic image, the method comprising the steps of:a) providing an objective (4) and an image sensor (22) in an initial configuration, wherein an optical image sensor axis parallel to and radially offset from a rotation axis (A);b) recording a first field in the initial configuration;c) rotating the image sensor (22) relative to the lens (4) by a given step angle about the axis of rotation (A) from the initial configuration to a first rotated configuration;d) recording a second field in the first rotated configuration.
    [13]
    13. The method for producing a photographic image according to claim 12, wherein the method further comprises the following steps:e) rotating the image sensor (22) relative to the lens (4) by the step angle about the axis of rotation (A) from the first rotated configuration to a second rotated configuration;f) recording a third field in the second rotated configuration;g) rotating the image sensor (22) relative to the lens (4) by the step angle about the axis of rotation (A) from the second rotated configuration to a third rotated configuration;h) recording a fourth field in the third rotated configuration.
    [14]
    A method for producing a photographic image according to claim 12 or claim 13, wherein the step or steps of rotating the image sensor (22) relative to the lens (4) via a photographic stitching device (1) according to one of claims 1 to 7 is executed.
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    同族专利:
    公开号 | 公开日
    CH710286B1|2019-06-28|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2017-09-29| PCAR| Change of the address of the representative|Free format text: NEW ADDRESS: BELLERIVESTRASSE 203 POSTFACH, 8034 ZUERICH (CH) |
    2017-12-15| NV| New agent|Representative=s name: IPRIME RENTSCH KAELIN AG, CH |
    优先权:
    申请号 | 申请日 | 专利标题
    CH01645/14A|CH710286B1|2014-10-27|2014-10-27|Photographic stitching device.|CH01645/14A| CH710286B1|2014-10-27|2014-10-27|Photographic stitching device.|
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