clear
clc
close all
Image = imread('LenaLAB512.tif');
[M,N,O] = size(Image);
[h,s,v] = rgb2hsv(Image);
H = h; S = s; V = v;
h = h*360;
%将hsv空间非等间隔量化：
% h量化成16级；
% s量化成4级；
% v量化成4级；
for i = 1:M
for j = 1:N
if h(i,j)<=15||h(i,j)>345
H(i,j) = 0;
end
if h(i,j)<=25&&h(i,j)>15
H(i,j) = 1;
end
if h(i,j)<=45&&h(i,j)>25
H(i,j) = 2;
end
if h(i,j)<=55&&h(i,j)>45
H(i,j) = 3;
end
if h(i,j)<=80&&h(i,j)>55
H(i,j) = 4;
end
if h(i,j)<=108&&h(i,j)>80
H(i,j) = 5;
end
if h(i,j)<=140&&h(i,j)>108
H(i,j) = 6;
end
if h(i,j)<=165&&h(i,j)>140
H(i,j) = 7;
end
if h(i,j)<=190&&h(i,j)>165
H(i,j) = 8;
end
if h(i,j)<=220&&h(i,j)>190
H(i,j) = 9;
end
if h(i,j)<=255&&h(i,j)>220
H(i,j) = 10;
end
if h(i,j)<=275&&h(i,j)>255
H(i,j) = 11;
end
if h(i,j)<=290&&h(i,j)>275
H(i,j) = 12;
end
if h(i,j)<=316&&h(i,j)>290
H(i,j) = 13;
end
if h(i,j)<=330&&h(i,j)>316
H(i,j) = 14;
end
if h(i,j)<=345&&h(i,j)>330
H(i,j) = 15;
end
end
end
for i = 1:M
for j = 1:N
if s(i,j)<=0.15&&s(i,j)>0
S(i,j) = 1;
end
if s(i,j)<=0.4&&s(i,j)>0.15
S(i,j) = 2;
end
if s(i,j)<=0.75&&s(i,j)>0.4
S(i,j) = 3;
end
if s(i,j)<=1&&s(i,j)>0.75
S(i,j) = 4;
end
end
end
for i = 1:M
for j = 1:N
if v(i,j)<=0.15&&v(i,j)>0
V(i,j) = 1;
end
if v(i,j)<=0.4&&v(i,j)>0.15
V(i,j) = 2;
end
if v(i,j)<=0.75&&v(i,j)>0.4
V(i,j) = 3;
end
if v(i,j)<=1&&v(i,j)>0.75
V(i,j) = 4;
end
end
end
% 构建4*16二维数组存放H-S数据
Hist = zeros(16,4);
for i = 1:M
for j = 1:N
for k = 1:16
for l = 1:4
if l==S(i,j)&& k==H(i,j)+1
Hist(k,l) = Hist(k,l)+1;
end
end
end
end
end
for k = 1:16
for l =1:4
His((k-1)*4+l) = Hist(k,l);%转化为一维数组
end
end
His = His/sum(His)*1000;
% 手工绘制彩色图像直方图
% hist_h
m=0;
for j = 1:300
if rem(j,16)==1 && m<16
for k = 0:15
for i = 1:200
hist_h(i,j+k) = m;
end
end
m = m+1;
end
end
% hist_s
m=0;
for j = 1:300
if rem(j,4) == 1 && m<64
n = rem(m,4);
for k = 0:3
for i =1:200
hist_s(i,j+k) = n+1;
end
end
m = m+1;
end
end
% hist_v
for j = 1:256
for i = 1:200
hist_v(i,j) = 0.98;
end
end
% 把His赋值给hist_v
for k = 1:64
for j = 1:256
if floor((j-1)/4) == k
for i = 1:200
if i<200-His(k+1)%i>His(k+1)%
hist_v(i,j) = 0;
end
end
end
end
end
%将h、s、v分量图合并转化为RGB模式
I_H = hsv2rgb(hist_h/16,hist_s/4,hist_v);
% 画图显示
figure;
subplot(2,2,1),imshow(Image),title('原图');
subplot(2,2,2),imshow(H,[]),title('H分量图');
subplot(2,2,3),imshow(S,[]),title('S分量图');
subplot(2,2,4),imshow(V,[]),title('V分量图');
figure;
imshow(I_H,[]);title('H-S直方图');
xlabel('颜色等级');ylabel('颜色值出现的频率');
% imwrite(I_H,'宿主图Peppers_H-S直方图.tif','tif');
