Matlab 實現感知雜湊法
阿新 • • 發佈:2019-02-16
BinToHex.m
function str=BinToHex(A)
str='';
for i=1:8
for j=1:4:8
temp = dec2hex(bin2dec(num2str(A(i,j:j+3))));
str=strcat(str,num2str(temp));
end
end
end
Perceptual_hash_algorithm
function A=Perceptual_hash_algorithm(str) img=imread(str); %轉換為灰度圖 temp=rgb2gray(img); %縮小到8*8 img2=imresize(temp,[8 8]); %劃分灰度等級為64 img2=uint8(double(img2)/4); %求均值 average=mean(mean(img2)); %生成二進位制矩陣 img2(img2<average) = 0; img2(img2>=average) = 1; A=img2; %將二進位制轉換為16進位制,指紋 Str=BinToHex(A) end
hash.m
clear all;
clc;
E=Perceptual_hash_algorithm('G:\\桌布\\高達UC\\gundam_uc-026.jpg');
F=Perceptual_hash_algorithm('G:\\桌布\\高達UC\\26_A.jpg');
G=xor(E,F);
a=sum(G(:)==1)