指纹图象小波压缩中子图信息的研究

STUDIES ON SUB-IMAGE INFORMATION IN FINGER PRINT IMAGE COMPRESSION USING WAVELET DECOMPOSITION

图象小波分解后,各子图信息对图象恢复的质量有很大的影响。本文结合指纹图象的特点,明确了各个子图在图象恢复中的重要性,并提出了一种适用于纹理图象的压缩方法,在保证较好的图象恢复质量和较大压缩比的情况下,简化了算法,加快了处理速度。

Sub-image information of the wavelet decomposed finger print image is essential to the quality of reconstructed image. This paper describes the importance of the sub-images according to the features of ringer print images, and provides a new method that can be used to compress texture images. It can simplify and accelerate the algorithm with a better reconstructed image quality as well as a larger compress ratio.