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A kind of algorithm to segment typhoon cloud image is proposed. First, fractal feature of typhoon cloud image is used to recognize center dense cloud region so that an initial segmentation region (ISR) including typhoon cloud series can be determined. Morphological operator and median filter are used to reduce latitude lines and amplitude lines in the ISR so as to obtain the pre-processed ISR (PISR)...
A single-threshold algorithm to segment typhoon cloud image is proposed based on contourlet transform and Bezier histogram. In order to enhance the contrast and reduce noise of the original typhoon cloud image, discrete contourlet transform is done to the original typhoon cloud image. The contrast is enhanced in the low frequency components based on non-linear transform in the contourlet domain. GA...
In order to reduce the noise in the infrared image, gray-level histogram was smoothed by Bezier curve and Bezier histogram was obtained. One dimension stationary wavelet transform was implemented to the curvature curve of Bezier histogram. Position of peak values of curvature curve in wavelet domain were adjusted from "fine-to-coarse" at all scales. The gray level values, which were located...
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