关键词: 台风云图, 伪彩色, 增强, Berkeley小波

Abstract: An efficient pseudo-color enhancement method for typhoon cloud image was proposed based on Berkeley Wavelet Transform (BWT) and linear assigning pseudo-color enhancement method. Details of the cloud were enhanced in the Berkeley wavelet domain. Then the enhanced cloud image was enhanced in color by classical linear assigning method and improved version respectively. The proposed method was compared with the classical linear assigning method and classical discrete wavelet transform with improved linear assigning method. The experimental results show that the proposed method is simple, of low computation burden and feasible. The proposed method provides a new technique to enhance the contrast of the low contrast typhoon cloud image. Using the proposed method, the eye and screwy cloud bands can be greatly extruded, which will provide a reference to locate the center and predict the intensity of the typhoon.

Key words: typhoon cloud image, pseudo color, enhancement, Berkeley wavelet