Face tracking for controlling imaging parameters
First Claim
Patent Images
1. A face detection and recognition method, comprising:
- receiving a first preview image of a scene and a second preview image of nominally the same scene;
determining whether the first preview image comprises one or more face regions;
in response to determining that the first preview image comprises one or more face regions;
determining a first location of a first face region in the first preview image;
based at least in part on the first location of the first face region in the first preview image, predicting a second location in the second preview image of a second face region corresponding to the first face region in the first preview image;
based at least in part on pixel information of the second face region in the second preview image, determining one or more characteristics of the second face region in the second preview image;
based at least in part on the one or more characteristics of the second face region in the second preview image, determining one or more acquisition parameters for acquiring a main image of nominally the same scene; and
acquiring the main image of nominally the same scene using the one or more acquisition parameters;
wherein the method is performed using one or more computing devices.
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Abstract
A method of tracking faces in an image stream with a digital image acquisition device includes receiving images from an image stream including faces, calculating corresponding integral images, and applying different subsets of face detection rectangles to the integral images to provide sets of candidate regions. The different subsets include candidate face regions of different sizes and/or locations within the images. The different candidate face regions from different images of the image stream are each tracked.
90 Citations
20 Claims
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1. A face detection and recognition method, comprising:
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receiving a first preview image of a scene and a second preview image of nominally the same scene; determining whether the first preview image comprises one or more face regions; in response to determining that the first preview image comprises one or more face regions; determining a first location of a first face region in the first preview image; based at least in part on the first location of the first face region in the first preview image, predicting a second location in the second preview image of a second face region corresponding to the first face region in the first preview image; based at least in part on pixel information of the second face region in the second preview image, determining one or more characteristics of the second face region in the second preview image; based at least in part on the one or more characteristics of the second face region in the second preview image, determining one or more acquisition parameters for acquiring a main image of nominally the same scene; and acquiring the main image of nominally the same scene using the one or more acquisition parameters; wherein the method is performed using one or more computing devices. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A digital image acquisition device, comprising a lens, an image sensor, a processor, and one or more instructions which, when executed by the processor, cause the processor to perform:
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receiving a first preview image of a scene and a second preview image of nominally the same scene; determining whether the first preview image comprises one or more face regions; in response to determining that the first preview image comprises one or more face regions; determining a first location of a first face region in the first preview image; based at least in part on the first location of the first face region in the first preview image, predicting a second location in the second preview image of a second face region corresponding to the first face region in the first preview image; based at least in part on pixel information of the second face region in the second preview image, determining one or more characteristics of the second face region in the second preview image; based at least in part on the one or more characteristics of the second face region in the second preview image, determining one or more acquisition parameters for acquiring a main image of nominally the same scene; and acquiring the main image of nominally the same scene using the one or more acquisition parameters. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A non-transitory computer readable storage medium storing one or more instructions which, when executed by one or more processors, cause the processors to perform:
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receiving a first preview image of a scene and a second preview image of nominally the same scene; determining whether the first preview image comprises one or more face regions; in response to determining that the first preview image comprises one or more face regions; determining a first location of a first face region in the first preview image; based at least in part on the first location of the first face region in the first preview image, predicting a second location in the second preview image of a second face region corresponding to the first face region in the first preview image; based at least in part on pixel information of the second face region in the second preview image, determining one or more characteristics of the second face region in the second preview image; based at least in part on the one or more characteristics of the second face region in the second preview image, determining one or more acquisition parameters for acquiring a main image of nominally the same scene; and acquiring the main image of nominally the same scene using the one or more acquisition parameters. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification