RESULTS OF RUNNING THE JPEG.M PROGRAM WITH DIFFERENT VALUES ON LENNA.MAT

blcksz	quant_mult.	PSNR (dB)	results

8	.1		43.88	apparently perfect
8	.5		35.63
8	1		32.92	very few artifacts
8	2		30.59	blockiness apparent at edges
8	3		29.36
8	4		28.41	smooth areas begin to get blocky
8	10		24.98	squares everywhere
8	20		21.88	picture mostly gray squares, few shades

4	1		37.59	apparently perfect
4	2		33.45	appears a little grainy
4	3		31.15	very blocky (grainy)

2	1		37.65	graininess added
2	3		29.63	few shades left in picture (maybe 12 grays)