SAR (Synthetic Aperture Radar) image sea-land segmentation method based on wavelet transform and OTSU threshold
A technology of wavelet transform and sea-land segmentation, applied in image analysis, image data processing, 2D image generation, etc., can solve the problems of poor universality and cumbersome implementation process, and achieve the effect of improving applicability
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[0046] The present invention will be further described below in conjunction with the accompanying drawings and specific examples.
[0047] The basic process of the sea and land segmentation method based on wavelet transform and OTSU threshold proposed by the present invention is as follows: Figure 4 As shown, the specific implementation steps are as follows:
[0048] Step 1: If Figure 4 As shown in box 1, the "multiplicative" speckle noise is transformed into "additive" by logarithmic operations.
[0049] f(x,r)=log(I(x,r))=log(σ(x,r) n(x,r))=log(σ(x,r))+log(n(x, r)) (1)
[0050] In the formula, I(·) represents the amplitude or intensity SAR image data, x and r represent the azimuth and distance sampling respectively; σ(·) is the texture component, which represents the change of scattering characteristics in the observation area, which is clearly visible on a large scale; n is a speckle noise component, which corresponds to information on a small scale.
[0051] Step 2:...
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