Face detecting system and method using symmetric axis
First Claim
1. A face detecting system using a symmetric axis, the system comprising:
- an image inputting unit for inputting a still image thereto;
an image converting unit for reducing the inputted image to a first certain size of image for a real-time process by using a pyramidal resolution reduction way;
a scanning unit for scanning the reduced image by applying a second certain size of symmetric mask;
a region dividing unit for dividing a region of the scanned mask into a left region and a right region with respect to the symmetric axis;
a symmetric-similarity computing unit for computing a symmetric similarity of a local region (Symmetric_measure_local) at the two divided regions and then computing a symmetric similarity of a global region (Symmetric_measure_global) to compute a symmetric similarity of a face region; and
a face region extracting unit for extracting a region having a symmetric axis at which the computed symmetric similarity is above a predetermined value, as the face region.
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Accused Products
Abstract
A face detecting system using a symmetric axis includes: an image inputting unit for inputting a still image thereto; an image converting unit for reducing the inputted image to a first certain size of image for a real-time process by using a pyramidal resolution reduction way; a scanning unit for scanning the reduced image by applying a second certain size of symmetric mask; a region dividing unit for dividing a region of the scanned mask into a left region and a right region with respect to the symmetric axis; a symmetric-similarity computing unit for computing a symmetric similarity of a local region at the two divided regions and then computing a symmetric similarity of a global region to compute a symmetric similarity of a face region; and a face region extracting unit for extracting a region having a symmetric axis at which the computed symmetric similarity is above a predetermined value, as the face region.
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Citations
23 Claims
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1. A face detecting system using a symmetric axis, the system comprising:
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an image inputting unit for inputting a still image thereto; an image converting unit for reducing the inputted image to a first certain size of image for a real-time process by using a pyramidal resolution reduction way; a scanning unit for scanning the reduced image by applying a second certain size of symmetric mask; a region dividing unit for dividing a region of the scanned mask into a left region and a right region with respect to the symmetric axis; a symmetric-similarity computing unit for computing a symmetric similarity of a local region (Symmetric_measure_local) at the two divided regions and then computing a symmetric similarity of a global region (Symmetric_measure_global) to compute a symmetric similarity of a face region; and a face region extracting unit for extracting a region having a symmetric axis at which the computed symmetric similarity is above a predetermined value, as the face region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A face detecting method using a symmetric axis, the method comprising the steps of:
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(a) inputting a still image thereto; (b) reducing the inputted image to a first certain size of image for a real-time process by using a pyramidal resolution reduction way; (c) scanning the reduced image by applying a second certain size of symmetric mask; (d) dividing the scanned mask into a left region and a right region with respect to the symmetric axis; (e) computing a symmetric similarity of a local region (Symmetric_measure_local) at the two divided regions and then computing a symmetric similarity of a global region (Symmetric_measure_global) to compute a symmetric similarity of a face region; and (f) extracting a region having a symmetric axis at which the computed symmetric similarity is above a predetermined value, as the face region. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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22. A face detecting method using a symmetric axis, the method comprising the steps of:
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reducing an inputted image to a reduced image of a first certain size for real-time processing by using pyramidal resolution reduction; scanning regions the reduced image by applying a symmetric mask of a second certain size; dividing each scanned region of the reduced image into a first region and a second region which are located symmetrically with respect to a symmetric axis of the symmetric mask; calculating a local symmetric similarity at the divided first and second regions to determine whether the scanned region corresponds to a face region or not; upon a determination that the scanned region corresponds to a face region, computing a global symmetric similarity of the scanned region by accumulating differences between pixels of the first region and corresponding pixels of the second region, wherein each of the pixels of the first region and the corresponding pixel of the second region are located symmetrically with respect to the symmetric axis; computing a symmetric similarity of the scanned region based on the local symmetric similarity and global symmetric similarity; and when the computed symmetric similarity is above a predetermined value, extracting the scanned region as a face region. - View Dependent Claims (23)
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Specification