Speedup of face detection in digital images
First Claim
Patent Images
1. A method for use in face detection, the method comprising:
- establishing a plurality of initial candidate windows within a digital image, said digital image having a plurality of pixels represented by color space information;
for each initial candidate window, examining said color space information for each of at least a portion of said pixels within said initial candidate window and classifying each of said examined pixels as being either a skin color pixel or a non-skin color pixel; and
establishing a plurality of subsequent candidate windows that includes at least a portion of said initial candidate windows based on said classified pixels within each of said initial candidate windows.
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Abstract
Improved methods and apparatuses are provided for use in face detection. The methods and apparatuses significantly reduce the number of candidate windows within a digital image that need to be processed using more complex and/or time consuming face detection algorithms. The improved methods and apparatuses include a skin color filter and an adaptive non-face skipping scheme.
80 Citations
86 Claims
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1. A method for use in face detection, the method comprising:
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establishing a plurality of initial candidate windows within a digital image, said digital image having a plurality of pixels represented by color space information;
for each initial candidate window, examining said color space information for each of at least a portion of said pixels within said initial candidate window and classifying each of said examined pixels as being either a skin color pixel or a non-skin color pixel; and
establishing a plurality of subsequent candidate windows that includes at least a portion of said initial candidate windows based on said classified pixels within each of said initial candidate windows. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A computer-readable medium having computer-implementable instructions for causing one or more processing units to perform acts comprising:
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establishing a plurality of initial candidate windows within a digital image, said digital image having a plurality of pixels represented by color space information;
for each initial candidate window, examining said color space information for each of at least a portion of said pixels within said initial candidate window;
classifying each of said examined pixels as being either a skin color pixel or a non-skin color pixel; and
establishing a plurality of subsequent candidate windows that includes at least a portion of said initial candidate windows based on said classified pixels within each of said initial candidate windows. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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49. An apparatus for use in face detection, the apparatus comprising:
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memory suitable for storing a digital image having a plurality of image pixels represented by color space information; and
logic operatively coupled to said memory and configured to;
establish a plurality of initial candidate windows using said digital image, wherein each initial candidate window including pixels associated with at least a portion of said image pixels, for each initial candidate window, examine said color space information for each of at least a portion of said pixels within said initial candidate window and classifying each of said examined pixels as being either a skin color pixel or a non-skin color pixel, and establish a plurality of subsequent candidate windows that includes at least a portion of said initial candidate windows based on said classified pixels within each of said initial candidate windows. - View Dependent Claims (50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65)
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66. A method for use in face detection, the method comprising:
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establishing a plurality of candidate windows within a digital image;
classifying at least one of said candidate windows as a non-face window;
determining a confidence score for said classified candidate window; and
based on said confidence score, selectively skipping further classification of at least one spatially neighboring candidate window. - View Dependent Claims (67, 68, 69, 70, 71, 72)
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73. A computer-readable medium having computer-implementable instructions for causing at least on processing unit to perform acts comprising:
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establishing a plurality of candidate windows within a digital image;
classifying at least one of said candidate windows as a non-face window;
determining a confidence score for said classified candidate window; and
based on said confidence score, selectively skipping further classification of at least one spatially neighboring candidate window. - View Dependent Claims (74, 75, 76, 77, 78, 79)
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80. An apparatus for use in face detection, the apparatus comprising:
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memory suitable for storing a digital image; and
logic operatively coupled to said memory and configured to establish a plurality of candidate windows within said digital image, classify at least one of said candidate windows as a non-face window, determine a confidence score for said classified candidate window, and based on said confidence score selectively skip further classification of at least one spatially neighboring candidate window. - View Dependent Claims (81, 82, 83, 84, 85, 86)
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Specification