发明名称 |
KEYPOINT DESCRIPTOR GENERATION BY COMPLEX WAVELET ANALYSIS |
摘要 |
The present application relates to a method of generating a keypoint descriptor for identifying an object in an image or a sequence of images, the keypoint descriptor being substantially invariant to a transformation of the object in the image. The method includes receiving object data representing an object for identification in an image; processing the object data to generate at least one basis function representing a feature having undergone at least one transformation or a transformation sequence across several consecutive frames, optionally using transformations that are out of a plane of the image to recognize objects from multiple views; modifying a prototype wavelet function based on the at least one basis function to generate a plurality of modified wavelet functions; comparing the plurality of modified wavelet functions with the at least one basis function; selecting a modified wavelet function of the plurality of modified wavelet functions based on the comparison of the plurality of modified wavelet functions with the at least one basis function; and processing an input image or input orientation field according to the selected modified wavelet function to generate the keypoint descriptor. The present application further relates to a method of identifying an object in an image using a keypoint descriptor; and processing apparatus and computer program products for implementing a method of the present application. |
申请公布号 |
US2014219567(A1) |
申请公布日期 |
2014.08.07 |
申请号 |
US201414249295 |
申请日期 |
2014.04.09 |
申请人 |
Cortexica Vision Systems Limited |
发明人 |
BHARATH Anil Anthony;NG SING KWONG Jeffrey |
分类号 |
G06K9/46 |
主分类号 |
G06K9/46 |
代理机构 |
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代理人 |
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主权项 |
1. A method of generating a keypoint descriptor for identifying an object in an image, wherein the keypoint descriptor is substantially invariant to a transformation of the object in the image, the method comprising:
receiving object data indicative of an object for identification in an image, the image having an image plane associated therewith; generating, by processing the received object data, at least one basis function representing a feature having undergone at least one transformation, using transformations that are out of the image plane to recognize objects from multiple views; modifying a prototype wavelet function based on the at least one basis function to generate a plurality of modified wavelet functions; comparing the plurality of modified wavelet functions with the at least one basis function; selecting a modified wavelet function of the plurality of modified wavelet functions based on the comparison of the plurality of modified wavelet functions with the at least one basis function; and generating the keypoint descriptor by processing at least one of an input image or an input orientation field according to the selected modified wavelet function to. |
地址 |
London GB |