Face tracking for controlling imaging parameters
First Claim
Patent Images
1. A face detection and recognition method, comprising:
- acquiring an image received from an image stream including one or more face regions;
calculating an integral image for at least a portion of the image or a sub-sampled version of at least a portion of the image, or both;
applying face detection to at least a portion of the integral image to provide a set of one or more candidate face regions;
using a database, including applying face recognition to one or more candidate face regions and providing an identifier for a recognized face;
storing the identifier for the recognized face in association with at least one image or portion thereof that include the recognized face from the image stream; and
adjusting white balance, color balance, focus, or exposure, or combinations thereof, for the recognized face.
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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.
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Citations
30 Claims
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1. A face detection and recognition method, comprising:
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acquiring an image received from an image stream including one or more face regions; calculating an integral image for at least a portion of the image or a sub-sampled version of at least a portion of the image, or both; applying face detection to at least a portion of the integral image to provide a set of one or more candidate face regions; using a database, including applying face recognition to one or more candidate face regions and providing an identifier for a recognized face; storing the identifier for the recognized face in association with at least one image or portion thereof that include the recognized face from the image stream; and adjusting white balance, color balance, focus, or exposure, or combinations thereof, for the recognized face. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A digital image acquisition device, comprising a lens, an image sensor, a processor, and a processor-readable memory having digital code embedded therein for programming the processor to perform a method of detecting and recognizing faces in digital images acquired by the device, wherein the method comprises:
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determining acquiring an image received from an image stream including one or more face regions; calculating an integral image for at least a portion of the image or a sub-sampled version of at least a portion of the image, or both; applying face detection to at least a portion of the integral image to provide a set of one or more candidate face regions; using a database, including applying face recognition to one or more candidate face regions and providing an identifier for a recognized face; storing the identifier for the recognized face in association with at least one image or portion thereof that include the recognized face from the image stream; and adjusting white balance, color balance, focus, or exposure, or combinations thereof, for the recognized face. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. One or more non-transitory processor-readable storage media having code embedded therein for programming a processor to perform a method of detecting and recognizing faces in digital images, wherein the method comprises:
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determining acquiring an image received from an image stream including one or more face regions; calculating an integral image for at least a portion of the image or a sub-sampled version of at least a portion of the image, or both; applying face detection to at least a portion of the integral image to provide a set of one or more candidate face regions; using a database, including applying face recognition to one or more candidate face regions and providing an identifier for a recognized face; storing the identifier for the recognized face in association with at least one image or portion thereof that include the recognized face from the image stream; and adjusting white balance, color balance, focus, or exposure, or combinations thereof, for the recognized face. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification