A Novel Psychovisual Threshold on Large DCT for Image Compression

Table 5

The average image reconstruction error using 8 × 8 JPEG compression and 256 × 256 JPEG compression using psychovisual threshold for 40 real images and 40 graphical images.

Image measurement	8 × 8 JPEG; compression		256 × 256 JPEG compression
	40 real images	40 graphic images	40 real images	40 graphic images
ARE	5.535	5.648	5.074	5.050
MSE	70.964	92.711	51.841	59.625
PSNR	31.190	31.636	32.363	33.421
SSIM	0.956	0.957	0.961	0.960