Classifications

• • G—PHYSICS
  • G06—COMPUTING; CALCULATING OR COUNTING
  • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
  • G06T3/00—Geometric image transformations in the plane of the image
  • G06T3/04—Context-preserving transformations, e.g. by using an importance map
  • G06T3/047—Fisheye or wide-angle transformations
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
  • H04N23/60—Control of cameras or camera modules

Definitions

• one solution is to assemble together several digital photos, as is also the case in the field of low-angle digital cameras.
• the solutions implementing this principle therefore require the transfer of the digital photos taken to a remote computer equipped with software capable of performing these operations, such as a key point positioning software (for example example of type "auto pano sift c"), a processing software (for example of the "hugin” type) or a fusion software (for example of the "enblend” type).
• a key point positioning software for example example of type "auto pano sift c”
• a processing software for example of the "hugin” type
• fusion software for example of the "enblend” type
• Another solution may be to try to optimize the digital photos as soon as they are taken into view, by means of a tripod adapted to such an operation, in order to optimize beforehand the assembly of these photos with each other and thus to obtain a good quality panoramic image.
• the object of the present invention is to remedy the aforementioned drawbacks of the existing solutions and to propose a method for producing panoramic images from cameras equipped with a wide-angle lens, which is both accessible to users and does not require not to access a remote processing unit.
• the present invention proposes a method of assisting the shooting of a digital photograph from an initial digital photograph obtained by means of a wide-angle lens associated with a digital camera device.
• method comprising obtaining a first intermediate image from the initial digital image by means of a projection mathematical function, obtaining a second intermediate image from the first intermediate image, by applying the function mathematical inverse of the projection mathematical function on at least a part of the first intermediate image and the simultaneous display, on a screen of the digital device, of the second intermediate image and an image visualized by the digital camera device to facilitate the shooting of the digital photo.
• the initial digital photograph has a substantially spherical shape and the mathematical projection function is an equidistant cylindrical projection function transforming the initial digital photograph into a first intermediate image of rectangular shape.
• the present invention also provides a method for obtaining a panoramic picture from the assembly of a series of digital photos obtained by means of a wide angle lens associated with a digital device, each of the digital photos of the series, with the exception of the first digital picture in this series, being obtained by using the above-mentioned shooting assisting method applied to the previous digital picture in this series.
• the panoramic photo covers an angle of view of at least 360 ° and the number of digital photos in the series is a function of the angle of view of the wide angle lens associated with the digital device. , in order to minimize the number of shots necessary to obtain such a completely panoramic photo (ie covering 360 °) according to the type of lens used.
• the panoramic photograph is obtained from the assembly of a series of two digital photos and the wide angle lens associated with the digital device has a shooting angle strictly greater than 180 °, This allows you to take a picture completely panoramic with a minimum of shots.
• the panoramic image is obtained from the assembly of a series of three digital photos and the wide angle lens associated with the device.
• digital camera has a shooting angle strictly greater than 120 °.
• the panoramic image is obtained from the assembly of a series of four digital photos and the wide angle lens associated with the digital device has a shooting angle strictly greater than 90. °, which makes it possible to obtain a completely panoramic photo by means of intuitive shots.
• a second additional intermediate image is displayed together with the second intermediate image (obtained from the penultimate digital photograph of the series of digital photos, this second additional intermediate image being obtained by application of the inverse mathematical function of the mathematical projection function on a part of a first additional intermediate image obtained by means of a mathematical projection function applied to the first digital photo of the digital photo series. Shooting the latest digital photo from a series of digital photos, to obtain a completely panoramic photo with a fitting fit between the last and the first photo in the series.
• the method comprises, after obtaining a series comprising at least three digital photos successively taken by means of the method of assisting the shooting above, an additional step of display simultaneous of the second intermediate image obtained from the digital photo preceding a digital photo to be corrected in said series on one side of the screen of the digital device and the second intermediate image obtained from the digital photo following the digital photo to be corrected in said series on the opposite side of the screen of the digital device, in order to facilitate the shooting of a new digital picture intended to replace the digital picture to be corrected.
• the present invention further provides a method for obtaining a three-dimensional panoramic digital picture, comprising obtaining a first panoramic digital picture from the assembly of a first series of digital photos obtained by means of a wide angle lens associated with a first digital device by implementing the steps of the method for obtaining a panoramic picture above, obtaining a second panoramic digital picture from the assembly of a second series of digital photos obtained by means of a wide-angle lens associated with a second digital device, arranged at a predefined distance from the first digital device, by implementing the steps of the method for obtaining a panoramic photograph and before, and the combination of the first panoramic digital photo and the second panoramic digital photo in order to obtain the panoramic digital photo in three dim ensions.
• the association step comprises obtaining a first homologous image by means of the extraction of a first color component of the image. 'a of the two panoramic digital photos, obtaining a second homologous image by extracting a second color component, different from the first component, from the other of the two digital panoramic photos and superimposing the two images counterparts to obtain the anaglyph image corresponding to the three-dimensional digital photo.
• the present invention also proposes a computer program comprising code instructions for the implementation of one of the above methods, when this program is executed by the processing unit of a digital device capable of being associated. to a wide angle lens.
• a program must be considered as a product within the framework of the protection sought by the present patent application.
• the present invention also proposes a digital device capable of facilitating the shooting of a new digital photograph from an initial digital photograph, the digital device comprising a photographic sensor capable of being associated with a wide-angle lens in order to capture the initial digital photograph and the new digital photograph, a screen adapted to display an image displayed by the digital sensor and a processing unit arranged to obtain a first intermediate image from an initial digital photograph captured by the photographic sensor associated with a wide-angle lens by means of a digital projection function and to obtain a second intermediate image from the first intermediate image by applying the inverse mathematical function to the projection function on at least a part of the first intermediate image, screen being arranged in addition to display the second intermediate image simultaneously with the image viewed by the digital sensor to facilitate capture of the new digital photo.
• a digital device capable of facilitating the shooting of a new digital photograph from an initial digital photograph
• the digital device comprising a photographic sensor capable of being associated with a wide-angle lens in order to capture the initial digital photograph and the new digital photograph, a screen adapted to display an image displayed by the
• the processing unit is further arranged to assemble said digital photos to obtain a panoramic image.
• the device includes a wide angle lens physically associated with the digital sensor.
• FIG. 1 illustrates the steps of a method of assisting the shooting of a new digital photograph from an initial digital photograph, by means of a wide-angle lens associated with a digital recording device. view, according to the present invention, as well as a method for obtaining a digital photograph using such a method of assisting shooting;
• FIG. 2 illustrates the steps of a method of shooting a three-dimensional panoramic digital photograph according to the present invention
• FIG. 3A illustrates the various intermediate images obtained from an initial digital photograph P; when applying the steps of the method of assisting shooting according to an embodiment of the present invention
• FIG. 3B illustrates the various intermediate images obtained from an initial digital photograph P; when applying the steps of the method of assisting shooting according to another embodiment of the present invention
• FIG. 4 schematically describes a digital device capable of facilitating the shooting of a new digital photograph from an initial digital photograph according to the present invention.
• FIG. 1 in which are illustrated the steps of a method of assisting the shooting of a new digital photograph from an initial digital photograph, by means of a lens wide angle associated with a digital shooting device, according to the present invention.
• wide-angle lens is used here to mean a lens having a short focal length to allow a wide framing of close-up objects that can not be moved away from one another, allowing a landscape to be photographed as a whole in the form of a panorama or a room inside a building.
• a wide-angle lens can be interpreted as a lens with a wider viewing angle than the natural perception of the human eye.
• a focal length of less than 35 mm will be considered as a wide-angle lens. The more this focal length decreases, and the more the lens responds to this definition of wide-angle lens.
• the method for assisting shooting includes a first step 11 of capturing an initial digital photograph P; by means of the associated wide angle lens, or even integrated, with the digital camera device.
• the method comprises a step 13 of obtaining a first intermediate image Im ; from this initial digital photo P; by means of a mathematical projection function.
• a mathematical projection function is used, which thus makes it possible to correct the deformation induced on the whole of the digital photograph P; by the use of a wide angle lens.
• Such a mathematical function of projection is a mathematical function taking as input data that can typically match the coordinates of a pixel in the captured digital photo P, and outputting data that can typically match the coordinates of a pixel in an output image where the induced distortion on the entire digital picture P is corrected.
• this mathematical projection function is an equidistant cylindrical projection function which transforms the digital photo P; in a first intermediate image Im ; rectangular shape.
• Equidistant cylindrical projection otherwise known as equirectangular projection or geographic projection, is usually used in cartography and consists of considering the polar latitude and longitude coordinates of a sphere as Cartesian coordinates on a projection plane.
• a first intermediate image of equirectangular type Im is then obtained ; from a digital photo P; of substantially spherical shape.
• a second intermediate image ⁇ 3 ⁇ 4 'can then be obtained from the first intermediate image Im ; in a second transformation step, by application, on at least a part of the first image intermediate Im i; the inverse mathematical function of the mathematical projection function used to obtain the first intermediate image Im ; .
• this second intermediate image Im; ' is obtained by means of a mathematical function inverse to that used to obtain the first intermediate image Im ; from the digital photo P i, the second intermediate image Im i ' will present a spherical shape similar to the digital photo P ;, and can therefore be used in superposition with an image displayed on the camera to facilitate the capture of the digital photo P; + i next by the user of the digital device.
• this inverse mathematical function consists of transforming the first intermediate image of equirectangular type Im ; in a second intermediate image Im; ' spherical type.
• the inverse mathematical function is applied to at least a part of the first intermediate image Im.
• at least a part is meant here as well a part of the first intermediate image Im (for example a vertical segment situated on one of the edges of this image) that the first intermediate image Im as a whole, the part used can be quite an empty part of visual information (that is, black pixels).
• this second intermediate image Im; ' is then displayed (display step 17) on the screen of the digital camera device, simultaneously with an Im image displayed by the camera, in order to be used for capturing a new digital photograph P; + i.
• these images can be displayed next to each other, or advantageously in a superimposed manner (for example the right edge of the second intermediate image Im 'being superimposed with the left edge of the Im image displayed by the camera, or vice versa) to guide the user in shooting.
• the user of the camera can then move the camera to overlay the second intermediate image Im; with the image Im in order to capture a new digital photo P; + i which is substantially aligned with the initial digital photograph P ;.
• This facilitates the capture of digital photos properly aligned with each other by means of a wide-angle lens, and thus improves their alignment upstream of the shooting, without necessarily having to resort to complex digital processing after this shooting.
• FIG. 1 furthermore describes the steps of a method for obtaining a panoramic photograph from the assembly of a series of digital photos ⁇ Pi ⁇ i ⁇ i ⁇ N, obtained by means of a lens at wide angle associated with a digital shooting device.
• This method of obtaining a panoramic picture P is remarkable in that, for each of the digital photos P; from the series of digital photos ⁇ Pi ⁇ i ⁇ i ⁇ N, with the exception of the first digital picture Pi of the series, the digital picture P; is obtained by using the above-mentioned shooting assisting method applied to the previous digital picture P i in this series.
• each of the digital photos P; (for i ranging from 2 to N) is captured using a second intermediate digital image ⁇ 3 ⁇ 4_ ⁇ ', itself obtained using a first intermediate digital image ⁇ 3 ⁇ 4_ ⁇ , obtained itself from the previous digital photo Pu.
• Such an assembly step 23 may consist of adding the digital photos with each other, in the direction corresponding to the order of shooting, possibly removing the common part of two successive photos P; and P i + i at the junction of these two photos.
• the final assembly corresponds to the assembly of equirectangular images obtained between each shot.
• the panoramic image P is thus obtained here by assembling a plurality of N digital photos ⁇ ,. ,., ⁇ ;, ..., P N taken successively by means of a digital camera using a wide-angle lens, where N is an integer at least greater than or equal to two.
• a progressive assembly of the digital photos taken successively can also be performed at each shot (ie for example after each step 1 1 of capture), in order to obtain an intermediate panoramic picture P '; corresponding to the assembly of digital photos Pi to P ; .
• a series of intermediate panoramic photo ⁇ ,,. ,., ⁇ '; P ' N each corresponding to the assembly of the last digital picture P; captured with the previous intermediate panoramic photo P '; _i can then be displayed to the user so that he can view the progress of his shooting of the panoramic photo and eventually stop the process if he considers that digital photos are not good enough taken to enable a sufficiently good quality panoramic picture to be obtained, or if it is content with pictures Pi to P ; already taken to create a panoramic photo with a coverage angle of less than 360 °.
• a 360 ° panoramic photograph P is constructed from N photos Pi to P N taken successively according to the method described above, a second additional intermediate image Imi "is displayed together with the second intermediate image.
• This second additional intermediate image Imi is obtained by applying the inverse mathematical function of the projection mathematical function to a part of a first additional intermediate image obtained by means of a mathematical projection function applied to the first digital image Pi of the series of digital photos or any other digital photo P already made, covering the current shooting space
• the user uses both P penultimate picture taken as the first picture taken to capture the last picture, which ensures the alignment of the last picture taken with the first photo taken using the above method, and therefore the panoramic photo P 360 ° is perfectly aligned at the joint between the first and last photo.
• the method comprises an additional step of simultaneous display, in addition to the image I m displayed by the digital recording device, of the second intermediate image ⁇ 3 ⁇ 4_ ⁇ "obtained from the digital photo Pu preceding the digital photo P to be corrected in this series on one side of the screen of the digital shooting device and the second intermediate image Im i + i "obtained from the digital photograph P; + i according to the digital photo P; to be corrected in this series on the opposite side of the digital camera screen.
• FIG. 2 illustrates the steps of a method of shooting a panoramic digital photograph in three dimensions according to the present invention.
• this method of shooting a three-dimensional digital photograph uses the method of assisting the shooting described above, but applied to two different digital devices DISP A and DISP B , separated by a distance d predefined and both associated respectively with a wide angle lens OBJ A and OBJ B.
• This method comprises, on the one hand, a step 110 of obtaining a first panoramic digital photograph P A from the assembly of a first series of N digital photos ⁇ ⁇ , ⁇ to P A , N (where N> 2), this first panoramic digital photo P A being obtained by means of a wide-angle lens OBJ A associated with a first digital device DISP A , by implementing the steps of the method of obtaining a panoramic photo described above.
• the first panoramic digital photo P A is obtained by assembling N digital photos ⁇ ⁇ , ⁇ to P A. , N j or:
• This method comprises, on the other hand, a step 120 of obtaining a second panoramic digital photograph P B from the assembly of a second series of N digital photos ⁇ ⁇ , ⁇ to P B , N (always where N> 2), this second panoramic digital photo P B being obtained, by means of a wide-angle lens OBJ B associated with a second digital device DISP B , by implementing the steps of the method of obtaining a panoramic photo described above.
• the second panoramic digital picture P B is obtained by assembling N digital pictures P B , i to P BN , where:
• the distance d between the two devices DISP A and DISP B is predefined so that the combination of the panoramic photos can give rise to a stereoscopic effect resulting in a three-dimensional photo.
• These two steps 110 and 120 are advantageously performed simultaneously, the first photo ⁇ ⁇ , ⁇ of the first series being taken simultaneously with the first photo P B , i of the second series, and so on, in order to optimize as much as possible. 3D effect obtained between the two series of digital photos.
• the process then continues with a step 130 of associating the first panoramic digital photograph P A with the second panoramic digital photograph P B in order to obtain a digital photograph in three P3D dimensions.
• Such an association step 130 can be performed remotely, on a remote processing unit.
• the three-dimensional digital picture P3D corresponds to an anaglyph image constituted from the superposition of two homologous images IH R and IH B v respectively extracted from the two panoramic digital photos P A and
• the association step 130 then comprises a first step of extracting, from one of the two panoramic digital photos P A and P B , a first color component in order to obtain a first homologous image IH R including only this first color component of this digital photo.
• this color component may be red, in which case the first homologous image IH R consists solely of pixels belonging to this red component.
• the association step 130 further comprises a second step of extracting, from the other of the two panoramic digital photos P A and P B , a second color component different from the first color component in order to obtain a second homologous image IH BV comprising only this second color component of this other digital photo.
• this color component may correspond to the blue and green colors, in which case the second homologous image IH BV consists solely of pixels belonging to these green and blue components.
• the two homologous images IH R and IH BV are then recombined, for example by superposition, in order to obtain an anaglyph image in which the three components are present, the first component of a point being, however, shifted by the second component of this same point because of the distance between the two cameras used to capture the two panoramic digital photos P A and P B.
• This anaglyph image then corresponds to the three-dimensional P3D digital photo.
• the shift between the red component, on the one hand, and the green and blue components, on the other hand, of the same point can also be designated under the terms parallax or disparity and generates a depth effect proportional to the distance between these respective components.
• the relief is then obtained by placing a filter of one of these two complementary colors on one eye and a filter of the other color on the other eye.
• each eye only perceives the elements of the image visible through the filter of the same color (if the background of the image is black) or the complementary color (if the background of the image is white), which allows you to recreate a relief effect using the stereoscopic capabilities of the brain.
• FIG. 3A illustrates the various intermediate images obtained from an initial digital photograph P; during the application of the steps of the method of assisting shooting according to an embodiment of the present invention.
• the digital picture P taken with a wide-angle lens associated with or integrated with the digital device for shooting.
• This digital photo P is here illustrated as having a substantially spherical shape and having a vertical axis.
• a straight line distorted by the wide-angle shooting mode is shown on the left side of this digital picture P; while three parallel straight lines distorted by the wide-angle shooting mode are shown on the right-hand side. from this digital photo P ;.
• a first intermediate image Im is obtained by applying a mathematical projection function to the digital photo P ;.
• a mathematical projection function is applied, which results in an intermediate image Im ; of equirectangular type in which all the equidistant points of the center of the digital photo P; spherical type are found on the same vertical line.
• This first intermediate image Im is then used to obtain a second intermediate image Im; ", by applying the inverse mathematical function to a part of this first intermediate image Im ; during a reverse transformation step 15.
• the part of the first intermediate image Im ; used during the reverse transformation step 15 is the right part of the first intermediate image Im ; which corresponds to the part of the digital picture P; located to the right of the axis of this one.
• this part of the first intermediate image ini is then shifted, during a shift step 14, to the left, which corresponds to creating a third intermediate image Im; "in which the part at the left end corresponds to the right part of the first intermediate image Im ; then complemented by black pixels.
• this third intermediate image Im "obtained, the inverse function at the equidistant cylindrical projection may be applied to the third intermediate image Im;", which results in a second intermediate image Im; ' of spherical shape in which the portion to the left of the axis corresponds to the right portion of the first intermediate image Im ; and therefore to the part located to the right of the axis on the digital photo P;
• This second intermediate image Im; ' can then be displayed on the screen of the digital device to facilitate shooting of the digital photo P; + i following, by superposition of the image displayed during this shooting with this second intermediate image Im; '.
• Figure 3A is illustrated a case where the right half of the first intermediate image Im ; is used, after shifting to the left, to obtain the second intermediate image Im; ' used for the next shot.
• FIG. 3B illustrates the various intermediate images obtained from an initial digital photograph P; during the application of the steps of the method according to another embodiment of the present invention.
• the second intermediate image Im; ' then comprises a portion corresponding to the inverse projection of this band, shifted to the left in a third intermediate image Im 1 ", and supplemented by black pixels.
• the portion undergoing projection and projection inversion is narrower in width than in the case of Figure 3A, the second intermediate image Im; may nevertheless be sufficient for the user to correctly overlay the viewed image of the digital photo P; + i next on the screen of his digital device.
• this vertical band may advantageously correspond to a cutoff band between two successive digital photos.
• the panoramic image that one wishes to obtain is a panoramic image of 360 °, that is to say covering entirely the horizon of the user, as well as the zenith and the nadir, as if he was spinning around himself.
• panoramic images are particularly sought after, for example in the field of photography by agents Real estate, because they allow the visualization of the whole of a room of an apartment by means of a single photo.
• the number N of digital photos depends on the angle of view of the wide-angle lens used to take the digital photos. The larger this angle, the smaller the number N of digital photos needed to cover a 360 ° field.
• the 360 ° panoramic image is obtained from the assembly of only two digital photos Pi and P 2 taken by means of a present wide-angle lens. a shooting angle strictly higher 180 °.
• the 360 ° panoramic image is obtained from three successive digital photos Pi, P 2 and P 3 taken by means of a wide-angle lens having a strictly greater angle of view. °.
• the 360 ° panoramic image is obtained from four successive digital photos Pi, P 2 , P 3 and P 4 taken by means of a wide angle lens has a shooting angle. strictly superior 90 °.
• This latter embodiment is advantageous in that it is particularly intuitive.
• the user can easily obtain a 360 ° panoramic photo from only four photos taken substantially in four directions oriented at 90 ° relative to each other, such as positions according to the cardinal points, turning successively in different directions.
• right angle positions which is easy in places having a square or rectangular shape as is usually the case for rooms located inside buildings.
• Figure 4 schematically discloses a digital device DISP adapted to facilitate the shooting of a new digital photograph from an initial digital photograph according to the present invention.
• this digital device DISP comprises a CAPT photographic sensor which is able to be associated with a wide-angle OBJ objective in order to capture digital photos at a wide angle.
• a photographic sensor thus captures the initial digital photograph P; discussed above, which will be used during the method according to the present invention to facilitate the shooting of a new digital photo Pj + i.
• This digital device DISP further comprises an SCN screen adapted to display an Im image displayed by the digital sensor.
• This screen SCN can be an LCD type screen, for example.
• This digital device DISP also comprises a processing unit PROC, which may take the form of a processor or a microprocessor, arranged to implement the steps of the method of assisting shooting described above.
• a processing unit PROC which may take the form of a processor or a microprocessor, arranged to implement the steps of the method of assisting shooting described above.
• this processing unit PROC is arranged to, firstly, obtain a first intermediate image Im ; from an initial digital photograph P;, captured by the photographic sensor when associated with a wide-angle lens OBJ, by means of a digital projection function, which may advantageously be the equidistant cylindrical projection function previously discussed. .
• This processing unit PROC is arranged, moreover, to obtain a second intermediate image Im; ' from the first intermediate image Im ; by applying the inverse mathematical function to the projection function on a part of the first intermediate image.
• the screen SCN is then arranged, in addition, to display the second intermediate image Im; ' obtained by the processing unit PROC simultaneously with the Im image displayed by the digital sensor, in order to facilitate the capture of the new digital photograph.
• the processing is further arranged to assemble said digital photos to obtain this panoramic image.
• the digital device DISP does not itself include the wide-angle lens OBJ for taking wide-angle digital photos. This may be the case for example if the digital device DISP is a mobile phone without a goal.
• the objective lens OBJ may be temporarily associated with the device Digital DISP, for example by screwing the objective on a thread of the digital device aligned with the CAPT sensor or by using magnetic means such as a magnet to attach the lens to the digital device.
• the digital device DISP comprises a wide angle objective OBJ physically associated with the digital sensor, that is to say permanently.
• this digital device DISP can then be a digital camera.
• the present invention furthermore aims at a computer program comprising code instructions for implementing the method of assisting the shooting above and / or the method of obtaining a panoramic image above.
• this program is executed by the processing unit of a digital device capable of being associated with a wide-angle lens, for example the processing unit of the digital device DISP when it is temporarily associated with, or even includes, it -even, a wide-angle objective OBJ.
• Such programs can use any programming language, and be in the form of source code, object code, or intermediate code between source code and object code, such as in a partially compiled form, or in n ' any other desirable form.
• the present invention also provides a data carrier readable by a data processor, and including code instructions of one of the programs mentioned above.
• This information carrier can be any entity or device capable of storing the program.
• the medium may comprise storage means, such as a ROM, for example a CD-ROM or a microelectronic circuit ROM, or a magnetic recording means, for example a diskette or a hard disk.
• This information carrier may also include FLASH type memory, for storing the program and recording information received by a client module, and RAM type memory for the backup of temporary data such as server lists and themes. associates.
• this information medium may be a transmissible medium such as an electrical or optical signal, which may be conveyed via an electrical or optical cable, by radio or by other means.
• the programs according to the invention may in particular be downloaded on an Internet-type network.
• the present invention is advantageously an application for indoor photo shooting, for example for use by real estate agents wishing to upload such photos to attract potential customers.
• the present invention can also serve as a perfect complement to a 3D mapping system similar to those currently proposed by Google, MAppy and other companies.
• the present invention may also advantageously find an application, in a non-exhaustive manner, in the field of tourism (guides, stays, hotels, restaurants, ...), insurance, expertise in real estate diagnosis, or any other activity requiring taking pictures to maintain a situation or precise configuration of a place at a time t.

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• Stereoscopic And Panoramic Photography (AREA)

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• 2011
  • 2011-01-07 FR FR1150128A patent/FR2970346B1/fr not_active Expired - Fee Related
  • 2011-09-27 EP EP11773792.4A patent/EP2661731A1/de not_active Withdrawn
  • 2011-09-27 WO PCT/FR2011/052250 patent/WO2012093209A1/fr active Application Filing

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