Method and apparatus for robustly collecting facial, ocular, and iris images using a single sensor
First Claim
1. A system for acquiring an enhanced resolution image from a plurality of received telescopic low resolution images of a facial feature of a subject in a field of view, the system comprising:
- a memory comprising instructions that when executed by a hardware processor of the system implement a subject tracker, the subject tracker configured to track the subject;
a single sensor coupled to the subject tracker and configured to acquire a burst of the plurality of received telescopic low resolution images of a depth of field in the field of view and containing the subject in response to determining, by the subject tracker, that the subject tracker has entered the field of view; and
a post processor coupled to the single sensor, the post processor configured to track the facial feature through the plurality of received telescopic images and to create the enhanced resolution image of the facial feature from the plurality of received telescopic low resolution images by enhancing at least the depth of field and the field of view by selecting a range of sequential low-resolution images of the plurality of received telescopic low resolution images based on the subject being within a threshold of focal quality and fusing the selected range of images.
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Abstract
The present invention relates to a method and apparatus for standoff facial and ocular acquisition. Embodiments of the invention address the problems of atmospheric turbulence, defocus, and field of view in a way that minimizes the need for additional hardware. One embodiment of a system for acquiring an image of a facial feature of a subject includes a single wide field of view sensor configured to acquire a plurality of images over a large depth of field containing the subject and a post processor coupled to the single sensor and configured to synthesize the image of the facial feature from the plurality of images.
33 Citations
20 Claims
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1. A system for acquiring an enhanced resolution image from a plurality of received telescopic low resolution images of a facial feature of a subject in a field of view, the system comprising:
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a memory comprising instructions that when executed by a hardware processor of the system implement a subject tracker, the subject tracker configured to track the subject; a single sensor coupled to the subject tracker and configured to acquire a burst of the plurality of received telescopic low resolution images of a depth of field in the field of view and containing the subject in response to determining, by the subject tracker, that the subject tracker has entered the field of view; and a post processor coupled to the single sensor, the post processor configured to track the facial feature through the plurality of received telescopic images and to create the enhanced resolution image of the facial feature from the plurality of received telescopic low resolution images by enhancing at least the depth of field and the field of view by selecting a range of sequential low-resolution images of the plurality of received telescopic low resolution images based on the subject being within a threshold of focal quality and fusing the selected range of images. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for acquiring an image of a facial feature of a subject in a telescopic field of view, the method comprising:
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acquiring a plurality of telescopic low resolution images of a depth of field containing the subject by at least tracking the facial feature through the plurality of images; selecting a range of sequential low-resolution images of the plurality of images based on the subject being within a threshold of focal quality; and synthesizing the image of the facial feature from the selected range of images by enhancing at least the depth of field and the field of view. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A non-transitory computer readable storage medium containing an executable program for acquiring an image of a facial feature of a subject in a telescopic field of view, where the program performs steps comprising:
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acquiring a plurality of telescopic low resolution images of a depth of field containing the subject; selecting a range of sequential low-resolution images of the plurality of images based on the subject being within a threshold of focal quality; and synthesizing the tracked image of the facial feature from the selected range of images by enhancing at least the depth of field and the field of view. - View Dependent Claims (20)
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Specification