A method of enhancing remote sensing lithology information based on color difference
A technology of information enhancement and lithology, applied in image enhancement, image data processing, instruments, etc., can solve the problems of insufficient lithology differences in enhanced images, unfavorable remote sensing geological interpretation work, lack of pertinence in enhanced processing, etc.
Active Publication Date: 2017-01-18
BEIJING RES INST OF URANIUM GEOLOGY
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However, for the lithology of a certain area, which enhancement method is more effective, in most cases, can only be known through continuous test and comparison, and there is a certain degree of blindness
[0003] In the practical application of remote sensing lithology information enhancement methods, when faced with multi-band multispectral remote sensing data (such as WorldView-2) or hyperspectral remote sensing data (such as CASI / SASI), there are various methods based on spectral features , the enhancement processing is not pertinent, and the influence of method selection and human factors may lead to insufficient lithological differences on the enhanced image, which is not conducive to further remote sensing geological interpretation.
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[0022] The method for enhancing remote sensing lithology information based on chromatic aberration provided by the present invention will be described in detail below with reference to embodiments.
[0023] The first step is to obtain remote sensing images and preprocess the remote sensing images to obtain the preprocessed remote sensing images; the preprocessing includes radiation correction, atmospheric correction and geometric correction in turn; the number of bands of the preprocessed remote sensing image is n;
[0024] In the second step, for the two different lithologies of X and Y, obtain the image spectral curves of the two lithologies on the image. The value corresponding to each band position on the curve is the brightness value of the band, that is: the lithology X is in The brightness value of each band is X 1 , X 2 , X 3 ,...X n , The brightness value of lithology Y in each band is Y 1 , Y 2 , Y 3 ,...Y n ;
[0025] The third step is to use 3 bands in the n bands of remo...
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The invention belongs to the field of remote sensing geological surveys, and particularly relates to a remote sensing lithological information enhancement method based on chromatic aberration. The method aims to highlight lithological differences in a targeted mode. The method includes the steps that remote sensing images are obtained; aiming at a lithological character X and a lithological character Y which are different, image spectral curves of the two lithological characters are obtained, and brightness values of all bands are obtained; in the bands, three bands are selected at will to be combined, and various band combination images are formed; the chromatic value H of the lithological character X and the chromatic value H' of the lithological character Y in each band combination image are calculated; the chromatic aberration delta H of the two lithological characters in each band combination image is worked out; values of the chromatic aberration delta H of all the band combination images are compared, the combination image with the maximum chromatic aberration is found out, and saturability enhancement processing is carried out on the combination image with the maximum chromatic aberration. According to the method, all possible color differences of the two lithological characters on the band combination images can be figured out, color composite images of certain three bands are selected, and the maximum color difference of the two lithological characters can be achieved.
Description
Technical field [0001] The invention belongs to the field of remote sensing geological survey, and specifically relates to a method for enhancing remote sensing lithology information based on chromatic aberration. Background technique [0002] In the application of remote sensing geology, image enhancement processing methods can be divided into spectral feature enhancement and spatial feature enhancement, among which lithology information enhancement is mainly based on spectral feature enhancement, including: band combination transformation, ratio enhancement, principal component transformation, HLS transformation, and contrast Enhancement methods, they usually achieve a certain degree of lithological information enhancement effect. However, for the lithology of a certain area, which enhancement method is more effective, in most cases can only be known through constant experimentation and comparison, and there is a certain degree of blindness. [0003] In the actual application of...
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IPC IPC(8): G06T5/00
Inventor 周家晶秦凯孙雨
Owner BEIJING RES INST OF URANIUM GEOLOGY