Fixed display of images in codec.m and added results to Document folder

Author: iuya

Codec/codec.m

@@ -14,7 +14,7 @@
 sub23 = lena_haar(257:512,257:512);
 figure
 subplot(4,4,1)
-imshow(sub11)
+imshow(sub11,[0,255])
 subplot(4,4,2)
 imshow(sub12)
 subplot(4,4,5)
@@ -126,10 +126,10 @@
 dq_lena(257:512,257:512) = dequantize_matrix(q_lena(257:512,257:512),4,8);
 
 synth_lena = haar_reverse_multilevel(dq_lena,2);
-imshow(synth_lena)
+imshow(synth_lena,[0,255])
 
 %%%%%%%% PSNR calculation %%%%%%%%
-[PSNR,MSE,MAXERR,L2RAT] = measerr(lena_gray_512,synth_lena)
+[PSNR,MSE,MAXERR,L2RAT] = measerr(lena_gray_512,synth_lena);
 % measerr already provides the PSNR but we can calculate it again using the
 % formula: 10 * log10((255^2)/MSE)
 PSNR_2 = 10 * log10((255^2)/MSE);

Documents/TD3-entropy.txt

@@ -0,0 +1,12 @@
+	
+Sub-band	Entropy   Huffman
+LL2			11.2518   11.2827
+HL2 		3.2664    3.2960
+LH2 		2.6242    2.6762
+HH2 		1.6033    1.7831
+HL  		1.5156    1.7344
+LH  		1.2970    1.5712
+LL  		0.9978    1.4522
+Full Image  2.5659    2.6689
+
+PSNR= 28.1571 for lena_gray_512 vs synth_lena