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US 10,592,729 B2Granted
Face detection method and apparatus
AssigneeSamsung Electronics Co., Ltd.
InventorsHao Feng, Chao Zhang, Wonjun Hwang, Biao Wang, Bing Yu, Chang Kyu Choi, Jaejoon Han
Life of this patent
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Abstract
Disclosed is a face detection method and apparatus, the method including detecting a candidate area from a target image using a first sliding window moving at an interval of a first step length and detecting a face area in the candidate area using a second sliding window moving at an interval of a second step length less than the first step length.
Claims18
A method of detecting a face, the method comprising:
- acquiring a target image to detect a face;
- scanning the target image using a first sliding window moving at an interval of a first step length;
- detecting a candidate area of the face in the target image based on first scan images scanned using the first sliding window;
- scanning the candidate area using a second sliding window moving at an interval of a second step length that is less than the first step length;
- and
- detecting a face area in the candidate area based on second scan images scanned using the second sliding window,
- wherein the detecting of the candidate area includes,
- extracting a first feature from a first image, the first image being one of the first scan images;
- inputting the first feature to weak classifiers each configured to identify the first image;
- generating a first cumulative score by accumulating scores acquired from the weak classifiers that are configured to identify the first image;
- verifying whether the first image corresponds to the face or a background based on whether the first cumulative score is included in a first range;
- and
- detecting the candidate area based on a verification result,
- wherein the first range is generated based on a first threshold and a second threshold, and
- wherein the weak classifiers are each configured to,
- determine that the first image corresponds to the face when a score greater than or equal to the first threshold is generated;
- and
- determine that the first image corresponds to the background when a score less than the second threshold is generated.
15 more elements
A method of detecting a face, the method comprising:
- acquiring a target image to detect the face;
- generating an image pyramid including first images of a first scale interval and second images of a second scale interval based on the target image;
- detecting a first face area based on the first images using a first face detector trained to perform face detection with respect to a first size;
- detecting a second face area based on the second images using a second face detector trained to perform face detection with respect to a second size;
- and
- detecting a third face area in the target image based on the first face area and the second face area.
3 more elements
An apparatus for detecting a face, the apparatus comprising:
- memory storing computer-executable instructions;
- and
- one or more processors configured to execute the computer-executable instructions such that the one or more processors are configured to,
- acquire a target image to detect the face and generate an image pyramid including first images of a first scale interval and second images of a second scale interval based on the target image,
- detect a first face area based on the first images using a first face detector trained to perform face detection with respect to a first size,
- detect a second face area based on the second images using a second face detector trained to perform face detection with respect to a second size, and
- detect a third face area in the target image based on the first face area and the second face area.
4 more elements
Dependencies are inferred from the claim text.