Method for generating underwater non-shadow sonar remote sensing orthographic digital image by computer

Abstract

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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Problems solved by technology

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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