Edge Defection Prediction by Using Wavelet Compression | Science Publications

Journal of Computer Science

Yas A.K. Alsultanny¹ 

关键词: Image Compression;    Wavelet;    Edge Detection;    Image Processing;   

DOI  :  10.3844/jcssp.2005.310.315

学科分类：计算机科学（综合）

来源: Science Publications

【 摘 要 】

Digital image have been expanding in usage. The importance of image compressionalgorithms have been increased, to produce smaller file size with a lower computational requirement. Thewavelet transform offers a natural decomposition of images at multiple resolutions, since the wavelettransform can decompose images into various multiresolution subbands, where the correlation exists. Anovel technique for image compression by taking advantage of correlation is addressed. It is based onpredictive edge detection from the LL band of the lowest resolution level to predict the edge in the LH,HL and HH bands in the higher resolution level. If the coefficient is predictive as an edge it is preserved,otherwise it is discarded. In the decoder, the location of the preserved coefficients can also be found as inthe encoder. Results showed that photo images give a higher degree of compression compared with thesatellite images, due to the information in the satellite images is higher than in the photo images.

【 授权许可】

Unknown