Medical Image Compression Based on Vector Quantization with Variable Block Sizes in Wavelet Domain

Table 1

Evaluation index value of our proposed algorithm and some contrast algorithms with compression ratio of 25.

	PSNR (dB)	Time (s)	MSE	NCC
DCT	27.24	13.22	37.12	0.9945
JPEG	28.11	14.65	35.65	0.9950
JPEG2000	34.16	12.20	24.94	0.9988
Fisher’s method	31.54	10.50	33.66	0.9968
The proposed method	37.5	2.34	11.70	0.9996