Sobel算子：是一种空域微分算子，可以通过它锐化图象。 将图象分块(8*8),作DCT变换,并作IDCT：DCT是一种可分离图象变换，用来图象压缩编码。-Sobel Operator : airspace is a differential operator, through its image sharpening. Image will block (8 * 8), for the DCT and IDCT for : DCT is a separable Image Transfor

利用DCT变换和哈德曼编码实现对彩色位图的压缩，并可求得图像压缩前后的差值。-Use DCT transform and Hardman Coding compression of color bitmap, and the difference obtained before and after image compression.

2D-DCT 压缩图像后，通过QPSK,AWGN信道编码传输后，IDCT解压缩回原始图像，适用于任何图像-Using DCT to compress the orginal image, I use zigzag program, quantization, dct compression, then change the vector to bineary bit to pass through the QPSK channel. And from the binary array, I us