Two stage detection for photographic eye artifacts
First Claim
Patent Images
1. A digital image acquisition device, comprising:
- an imaging optic and detector for acquiring digital images including one or more preview images and a main image;
a processor;
a face detector to analyze the one or more preview images to ascertain information relating to candidate face regions therein, the face detector including a search module for detecting candidate face regions;
a face tracking module for predicting and confirming candidate face regions;
an image acquisition chain for image processing to generate a sub-sample resolution version of the main image, including a reduced resolution version of an approximately same scene as the main image;
a first speed-optimized face defect filter to produce a first set of candidate face defect regions in the sub-sample resolution version of the main image based on the candidate face region information provided by the face detector;
a display to show a first speed-optimized face defect filtered acquired image thereon; and
a second analysis-optimized face defect filter configured to be activated after display of said first speed-optimized corrected acquired image on said display, said second filter being activated after a predetermined idle time, said second analysis-optimized face defect filter being configured to produce, with enhanced accuracy of face defect detection and/or higher quality of image correction than the first filter, a second set of candidate face defect regions for viewing at a higher resolution than the first speed-optimized face defect filtered acquired image shown on said display.
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Abstract
A digital image acquisition device is for acquiring digital images including one or more preview images. A face detector analyzes the one or more preview images to ascertain information relating to candidate face regions therein. A speed-optimized filter produces a first set of candidate red-eye regions based on the candidate face region information provided by the face detector.
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Citations
19 Claims
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1. A digital image acquisition device, comprising:
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an imaging optic and detector for acquiring digital images including one or more preview images and a main image; a processor; a face detector to analyze the one or more preview images to ascertain information relating to candidate face regions therein, the face detector including a search module for detecting candidate face regions; a face tracking module for predicting and confirming candidate face regions; an image acquisition chain for image processing to generate a sub-sample resolution version of the main image, including a reduced resolution version of an approximately same scene as the main image; a first speed-optimized face defect filter to produce a first set of candidate face defect regions in the sub-sample resolution version of the main image based on the candidate face region information provided by the face detector; a display to show a first speed-optimized face defect filtered acquired image thereon; and a second analysis-optimized face defect filter configured to be activated after display of said first speed-optimized corrected acquired image on said display, said second filter being activated after a predetermined idle time, said second analysis-optimized face defect filter being configured to produce, with enhanced accuracy of face defect detection and/or higher quality of image correction than the first filter, a second set of candidate face defect regions for viewing at a higher resolution than the first speed-optimized face defect filtered acquired image shown on said display. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for filtering a face defect artifact from an acquired digital image, the method comprising:
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using a processor; detecting candidate face regions; predicting and confirming candidate face regions; acquiring one or more preview images; analyzing the one or more preview images to ascertain information relating to candidate face regions therein; acquiring a main image using a lens and image sensor; generating and analyzing a sub-sample resolution version of the main image, including a reduced resolution version of an approximately same scene as the main image; producing a first set of candidate face defect regions in the main image based on the candidate face region information in the one or more preview images provided by the face detector and on the analysis of the sub-sample resolution version of the main image; displaying a first speed-optimized face defect filtered acquired image thereon; and activating a second analysis-optimized filter after displaying said first speed-optimized corrected acquired image, said activating being performed after a predetermined idle time, said second analysis-optimized face defect filter being configured for enhanced accuracy of face defect detection and/or higher quality of image correction than the first speed-optimized face defect filtered acquired image, and thereby producing a second set of candidate face defect regions for viewing at a higher resolution than the displaying of said first speed-optimized face defect filtered acquired image. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification