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A kind of hyperspectral image corner detection method and system

A hyperspectral image and corner point detection technology, which is applied in image analysis, image data processing, instruments, etc., can solve the problems that hyperspectral images cannot be used

Active Publication Date: 2018-04-24
SHENZHEN UNIV
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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a hyperspectral image corner detection method and system, aiming to solve the problem that the current Harris corner detection method can only be used for grayscale images or video images but not for hyperspectral images , improving the effect of hyperspectral image pattern recognition

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  • A kind of hyperspectral image corner detection method and system
  • A kind of hyperspectral image corner detection method and system
  • A kind of hyperspectral image corner detection method and system

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[0110] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0111] When performing hyperspectral Harris corner point detection, it is possible to detect whether a point is a Harris corner point by judging the correlation between a point in the hyperspectral image and its neighborhood; specifically, if the correlation between a point and its neighborhood is small, That is, within its neighborhood, if the gray level of the image changes greatly, then the point is a Harris corner point; otherwise, it is not a corner point. However, in fact, the degree of correlation between a certain point and its neighbors cannot be well measured. Therefore, the present inven...

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Abstract

A hyperspectral image corner detection method and system. The method comprises the following steps: step A, constructing a weighted correlation function about a certain point p 0 in a hyperspectral image f(x, y, z) and a point p 1 on a neighbourhood thereof (A); step B, constructing a corner response function according to the weighted correlation function (B); step C, calculating a Harris corner response value of the certain point p 0 in the hyperspectral image f(x, y, z) and Harris corner response values of all points on the neighbourhood thereof according to the corner response function (C); and step D, if the Harris corner response value of the certain point p 0 in the hyperspectral image f(x, y, z) is greater than the Harris corner response values of all the points on the neighbourhood thereof, determining the point p 0 to be a Harris corner of the hyperspectral image f(x, y, z) (D). The detection method can acquire key information about a hyperspectral image, thereby being capable of better analyzing the hyperspectral image and improving the pattern recognition effect of the hyperspectral image.

Description

technical field [0001] The invention belongs to the field of corner point detection, and in particular relates to a hyperspectral image corner point detection method and system. Background technique [0002] In recent years, hyperspectral images have been widely used in many fields, including remote sensing, machine vision, artificial intelligence, medicine, astronomy, etc. Different from gray-scale images and color images, hyperspectral images are superimposed by images of multiple bands such as visible light, near-infrared, short-wave infrared, mid-wave infrared, and thermal infrared. Therefore, hyperspectral images can provide more information than grayscale and color images. Feature extraction is a common method of image analysis. However, the existing hyperspectral image feature extraction method is not yet mature. Feature extraction cannot solve more complex target recognition and segmentation problems. [0003] The local feature of the image is an important feature...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/60
CPCG06T7/00
Inventor 李岩山石伟谢维信张勇
Owner SHENZHEN UNIV
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