Image Compression
摘要
Image compression is as essential as its processing, since images require large amounts of memory and, in their original form, it is difficult to transmit and store them. There are two types of image compression: (i) lossless and (ii) lossy. In lossless compression, the original image can be reconstructed exactly from its compressed version. Lossy compression is based on the fact that the magnitude of the frequency components of typical images decrease with increasing frequency. Emphasis is given to using the DWT, since it is a part of the current image compression standard.