Face tracking in a camera processor
First Claim
1. A method operable in a digital image acquisition system having no photographic film, comprising:
- using a processor in performing the following;
a) receiving a relatively low resolution image of a scene from an image stream, said scene including one or more faces;
b) applying at least one relatively long face classifier to said image to identify any relatively large sized face regions;
c) applying at least one relatively short face classifier to said image to identify one or more relatively small sized face regions;
d) receiving a relatively high resolution image of approximately the same scene; and
e) applying at least one relatively long face classifier to at least one of said one or more identified small sized face regions in said relatively high resolution image.
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Accused Products
Abstract
A method operable in a digital image acquisition system having no photographic film is provided. The method comprises receiving a relatively low resolution image of a scene from an image stream, wherein the scene potentially includes one or more faces. At least one high quality face classifier is applied to the image to identify relatively large and medium sized face regions and at least one relaxed face classifier is applied to the image to identify relatively small sized face regions. A relatively high resolution image of nominally the same scene is received and at least one high quality face classifier is applied to the identified small sized face regions in the higher resolution version of said image.
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Citations
25 Claims
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1. A method operable in a digital image acquisition system having no photographic film, comprising:
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using a processor in performing the following; a) receiving a relatively low resolution image of a scene from an image stream, said scene including one or more faces; b) applying at least one relatively long face classifier to said image to identify any relatively large sized face regions; c) applying at least one relatively short face classifier to said image to identify one or more relatively small sized face regions; d) receiving a relatively high resolution image of approximately the same scene; and e) applying at least one relatively long face classifier to at least one of said one or more identified small sized face regions in said relatively high resolution image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A digital image acquisition apparatus, comprising a first processor coupled to an imaging sensor, and a second processor coupled to said first processor, wherein said first processor is arranged to provide an acquired image to said second processor and said second processor is arranged to store said image, and
wherein said first processor is arranged to apply at least one relatively long face classifier to a relatively low resolution image of a scene from an image stream, said scene including one or more faces, to identify any relatively large sized face regions, and to apply at least one relatively short face classifier to said image to identify one or more relatively small sized face regions; - and
wherein said second processor is arranged to receive a relatively high resolution image of approximately the same scene and to apply at least one relatively long face classifier to at least one of said one or more identified small sized face regions in said relatively high resolution image.
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14. One or more non-transitory processor-readable storage devices having program code embodied therein for programming one or more processors to perform a method operable in a digital image acquisition system having no photographic film, wherein the method comprises:
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a) receiving a relatively low resolution image of a scene from an image stream, said scene including one or more faces; b) applying at least one relatively long face classifier to said image to identify any relatively large sized face regions; c) applying at least one relatively short face classifier to said image to identify one or more relatively small sized face regions; d) receiving a relatively high resolution image of approximately the same scene; and e) applying at least one relatively long face classifier to at least one of said one or more identified small sized face regions in said relatively high resolution image. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification