Collaborative sighting
First Claim
1. A method of collaborative sighting using plural optical sighting apparatuses that each comprise:
- a camera unit arranged to capture an image of a portion of a scene within a field of view of the camera unit; and
a display device arranged to display images captured by the camera unit, the method comprising;
detecting features within images captured by the camera units of the optical sighting apparatuses;
generating descriptors in respect of each image from respective patches of the image at a position of each detected feature by the optical sighting apparatuses whose camera units capture the images;
detecting corresponding descriptors generated from different images;
deriving geometric calibration of the camera units with respect to the scene from positions in respective images of the features corresponding to the detected corresponding descriptors, wherein the geometric calibration is derived in real time as the corresponding descriptors are detected;
in respect of at least one target location in the image captured by the camera unit of a first optical sighting apparatus, identifying, from the derived geometric calibration of the camera units, a corresponding location relative to the image captured by the camera unit of a second optical sighting apparatus that corresponds to a target location in the scene that itself corresponds to the target location in the image captured by the camera unit of the first optical sighting apparatus; and
indicating on the display device of the second optical sighting apparatus where the corresponding location lies relative to the displayed image, whereindetecting the features and generating the descriptors are performed in respect of each image by the optical sighting apparatus whose camera unit captures that image.
2 Assignments
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Accused Products
Abstract
Collaborative sighting is performed using plural optical sighting apparatuses that each comprise: a camera unit and a display device. Geometric calibration of the camera units with respect to the imaged scene is performed by detecting features within captured images, generating descriptors from respective patches of the image at the features; detecting corresponding descriptors from different images, and deriving the geometric calibration from the positions in the respective images of the corresponding descriptors. A target location in the image captured by a first optical sighting apparatus is designated and a corresponding location relative to the image captured by the second one optical sighting apparatus is identified from the geometric calibration. The display device of the second optical sighting apparatus indicates where the corresponding location lies relative to the displayed image.
5 Citations
20 Claims
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1. A method of collaborative sighting using plural optical sighting apparatuses that each comprise:
- a camera unit arranged to capture an image of a portion of a scene within a field of view of the camera unit; and
a display device arranged to display images captured by the camera unit, the method comprising;detecting features within images captured by the camera units of the optical sighting apparatuses; generating descriptors in respect of each image from respective patches of the image at a position of each detected feature by the optical sighting apparatuses whose camera units capture the images; detecting corresponding descriptors generated from different images; deriving geometric calibration of the camera units with respect to the scene from positions in respective images of the features corresponding to the detected corresponding descriptors, wherein the geometric calibration is derived in real time as the corresponding descriptors are detected; in respect of at least one target location in the image captured by the camera unit of a first optical sighting apparatus, identifying, from the derived geometric calibration of the camera units, a corresponding location relative to the image captured by the camera unit of a second optical sighting apparatus that corresponds to a target location in the scene that itself corresponds to the target location in the image captured by the camera unit of the first optical sighting apparatus; and indicating on the display device of the second optical sighting apparatus where the corresponding location lies relative to the displayed image, wherein detecting the features and generating the descriptors are performed in respect of each image by the optical sighting apparatus whose camera unit captures that image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
- a camera unit arranged to capture an image of a portion of a scene within a field of view of the camera unit; and
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18. A system comprising a plurality of optical sighting apparatuses for performing collaborative sighting, each optical sighting apparatus comprising a camera unit arranged to capture an image of a portion of a scene within a field of view of the camera unit;
- a display device arranged to display the image captured by the camera unit, and a processing unit, wherein the processing unit is arranged to;
detect features within an image captured by a first camera unit; generate descriptors from respective patches of the image at a position of each detected feature; detect corresponding descriptors generated from the image captured by the camera unit of the said optical sighting apparatus and the image captured by a camera unit of at least one other optical sighting apparatus; derive geometric calibration of the camera unit of the said optical sighting apparatus and the camera unit of the at least one other optical sighting apparatus with respect to the scene from positions in respective images of the features corresponding to the detected corresponding descriptors, wherein the geometric calibration is derived in real time as the corresponding descriptors are detected; in respect of at least one target location in the image captured by the camera unit of another optical sighting apparatus, identifying, from the derived geometric calibration of the camera units, a corresponding location relative to the image captured by the camera unit of the said optical sighting apparatus that corresponds to a target location in the scene that itself corresponds to the target location in the image captured by the camera unit of the at least one other optical sighting apparatus; and control the display device of the said optical sighting apparatus to indicate where the corresponding location lies relative to the displayed image. - View Dependent Claims (19, 20)
- a display device arranged to display the image captured by the camera unit, and a processing unit, wherein the processing unit is arranged to;
Specification