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US Patent 7227996 - Image processing method and apparatus for comparing edges between images
US Patent Issued on June 5, 2007
Estimated Patent Expiration Date:
January 25, 2022Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
Estimated Patent Expiration Date:
January 25, 2022Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.AbstractAn image processing method for detecting an object from an input image using a template image, including inputting a specified image with respect to both a template image and an input image, calculating an edge normal direction vector of said specified image, generating an evaluation vector from said edge normal direction vector, subjecting the evaluation vector to orthogonal transformation, a step of performing a product sum calculation of corresponding spectral data with respect to each evaluation vector that has been subjected to orthogonal transformation and has been obtained for each of said template image and said input image, and a step of subjecting it to inverse orthogonal transformation and generating a similarity value map. The formula of the similarity value, the orthogonal transformation, and the inverse orthogonal transformation each have linearity. The pattern recognition is one in which the component of the similarity value is not subjected to positive/negative reversal through variations in brightness of the background.Other References
| InventorsAssigneeApplicationNo. 10057756 filed on 01/25/2002US Classes:382/199, Pattern boundary and edge measurements382/181, PATTERN RECOGNITION382/190, Feature extraction382/191, Multispectral features (e.g., frequency, phase)382/209, Template matching (e.g., specific devices that determine the best match)382/280, Fourier transform382/232, IMAGE COMPRESSION OR CODING382/218, Comparator358/518, Color correction382/236, Interframe coding (e.g., difference or motion detection)382/118, Using a facial characteristic382/124, Using a fingerprint345/581, Attributes (surface detail or characteristic, display attributes)382/219, Determining both similarities and differences382/100, APPLICATIONS382/103, Target tracking or detecting382/282, Selecting a portion of an image348/14.12Transmission control (e.g., resolution or quality)Field of Search382/181, PATTERN RECOGNITION382/190, Feature extraction382/191, Multispectral features (e.g., frequency, phase)382/199, Pattern boundary and edge measurements382/209, Template matching (e.g., specific devices that determine the best match)382/288, Determining center of gravity or moment382/232, IMAGE COMPRESSION OR CODING382/218ComparatorExaminersPrimary: Mehta, Bhavesh M.Assistant: Strege, John Attorney, Agent or FirmUS Patent References5296945, Video ID photo printing apparatus and complexion converting apparatusIssued on: 03/22/1994 Inventor: Nishikawa, et al.5535288, System and method for cross correlation with application to video motion vector estimator Issued on: 07/09/1996 Inventor: Chen, et al.5751856, System for processing a quantized vector using spatial frequency correlations Issued on: 05/12/1998 Inventor: Hirabayashi5781650, Automatic feature detection and age classification of human faces in digital images Issued on: 07/14/1998 Inventor: Lobo, et al.5905807, Apparatus for extracting feature points from a facial image Issued on: 05/18/1999 Inventor: Kado, et al.5909501, Systems and methods with identity verification by comparison and interpretation of skin patterns such as fingerprints Issued on: 06/01/1999 Inventor: Thebaud5990901, Model based image editing and correction Issued on: 11/23/1999 Inventor: Lawton, et al.6075898, Reflective array compressor Issued on: 06/13/2000 Inventor: Chase6154566, Method and apparatus for determining image similarity and position Issued on: 11/28/2000 Inventor: Mine, et al. 6195460, 6278791, Lossless recovery of an original image containing embedded data Issued on: 08/21/2001 Inventor: Honsinger, et al.6507660, Method for enhancing air-to-ground target detection, acquisition and terminal guidance and an image correlation system Issued on: 01/14/2003 Inventor: Wirtz, et al.6529630Method and device for extracting principal image subjects Issued on: 03/04/2003 Inventor: Kinjo Foreign Patent References
International ClassesG06K 9/00G06K 9/46 G06K 9/62 G06K 9/66 |
