Method for generating underwater non-shadow sonar remote sensing orthographic digital image by computer
A digital image and remote sensing image technology, applied in computing, image enhancement, image data processing, etc.
Inactive Publication Date: 2007-09-12
SHANGHAI UNIV
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The existing sonar remote sensing digital image processing and application technology and orthophoto image processing technology have not fundamentally solved these important problems
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[0078] A preferred embodiment of the present invention is described in detail with reference to the accompanying drawings as follows:
[0079] This example is a sonar remote sensing image of Qingdao Bohai Bay 2004.10.10. The shadowless sonar remote sensing orthophoto digital image is generated by a computer.
[0080] Referring to Figure 1, the computer-generated method of this underwater shadowless sonar orthographic digital image is as follows: First, establish a mathematical model of the quantitative relationship between sonar remote sensing information and underwater terrain, sonar direct sound waves and water scattered sound waves; Analysis of sonar remote sensing digital image: generate sonar direct acoustic remote sensing image and water scattered acoustic remote sensing image, calculate pixel sonar direct acoustic wave transformation coefficient, water scattered acoustic wave transformation coefficient and pixel ground radiation parameter, that is, the scattering / direct rad...
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This invention relates to a computer production method of underwater non-shadow sonar remote sensing perpendicular incidence digital picture. This method is: First, establishes the quotarelations digital principle model between sonar remote sensing information with the underwater terrain, the sonar perpendicular incidence sound wave and the water body diffused sound wave; Continues analysis sonar remote sensing digital picture: Produces the sonar perpendicular incidence sound wave remote sensing picture and the sky diffused sound wave remote sensing picture, computes the pixel sonar perpendicular incidence sound wave transformation ratio, the water body diffused light sound wave transformation ratio and pixel terrestrial surface radiation parameter, named scattering / perpendicular incidence ratio, scattering / radiation ratio; Establishes underwater horizontal terrain transformation model of the sonar perpendicular incidence sound wave and the water body diffused light sound wave remote sensing digital picture, separately carries on underwater horizontal terrain transformation, eliminates the radiation difference in the underwater accidented relief and this kind of difference influence on the sonar remote sensing digital picture; Then judges and eliminates the underwater mountain body and the water body background shadow of remote sensing digital picture; Finally completes the computer production of the underwater sonar remote sensing digital picture no-shadow perpendicular incidence video in this foundation. This invention theory, method is advanced, scientific, reasonable compare to the traditional remote sensing digital processing, widely applies to the quantitative investigation and the application of the remote sensing technology. This invention theory, method has originality, developing; widely apply to the quantitative investigation and application of the sonar remote sensing technology.
Description
Technical field: [0001] The invention relates to a sonar remote sensing digital image processing method, in particular to a principle method for removing shadows on sonar remote sensing digital images and restoring remote sensing values of pixels in shadows. Background technique: [0002] The influence and correction of underwater terrain on sonar remote sensing information (including the elimination of underwater mountain shadows and water background shadows) has always been a difficult problem in sonar remote sensing digital image processing and application. The existing sonar remote sensing digital image processing and application technology and orthophoto processing technology have not fundamentally solved these important problems. After searching for novelties, there are no relevant documents and patent reports at home and abroad. This invention solves this problem theoretically and practically. Summary of the invention: [0003] The purpose of the present invention is to...
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IPC IPC(8): G06T5/00G01S15/00
Inventor 师彪李先华张凌峰唐振军魏为民
Owner SHANGHAI UNIV
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