gusucode.com > BP神经网络实现图像压缩 > BP神经网络实现图像压缩/bp_imageRecon.m
% bp_imageRecon.m %% 清理 clear,clc close all %% 载入数据 col=256; row=256; I=imread('d:\lena.bmp'); load comp com.lw=double(com.lw)/63; com.b=double(com.b)/63; com.d=double(com.d)/63; com.lw=com.lw*(maxlw-minlw)+minlw; com.b=com.b*(maxb-minb)+minb; com.d=com.d*(maxd-mind)+mind; %% 重建 for i=1:4096 Y(:,i)=com.lw*(com.d(:,i)) +com.b; end %% 反归一化 Y=uint8(Y*255); %% 图像块恢复 I1=re_divide(Y,col,4); %% 计算性能 fprintf('PSNR :\n '); psnr=10*log10(255^2*row*col/sum(sum((I-I1).^2))); disp(psnr) a=dir(); for i=1:length(a) if (strcmp(a(i).name,'comp.mat')==1) si=a(i).bytes; break; end end fprintf('rate: \n '); rate=double(si)/(256*256); disp(rate) figure(1) imshow(I) title('原始图像'); figure(2) imshow(I1) title('重建图像');