Matlab影像程式設計

image processing

image processing matlab

RGB和HSV有何不同

CMYK COLOR

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clc;
close all;
clear;
m=256;
n=256;
% R = zeros(m,n);
% G = zeros(m,n);
% B = zeros(m,n);

R = 255*ones(m,n);
G = 255*ones(m,n);
B = 255*ones(m,n);


figure, imshow(R), title('gary');
figure, imshow(G), title('gary');
figure, imshow(B), title('gary');

RGBI(:,:,1)=R;
RGBI(:,:,2)=G;
RGBI(:,:,3)=B;
figure, imshow(RGBI), title('RGBI');

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clc;
close all;
clear;
m=256;
n=256;
% R = zeros(m,n);
% G = zeros(m,n);
% B = zeros(m,n);

R = 155*uint8(ones(m,n));
G = 55*uint8(ones(m,n));
B = 255*uint8(ones(m,n));


figure, imshow(R), title('gary');
figure, imshow(G), title('gary');
figure, imshow(B), title('gary');

RGBI(:,:,1)=R;
RGBI(:,:,2)=G;
RGBI(:,:,3)=B;

figure, imshow(RGBI), title('RGBI');

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clc;
close all;
clear;

%Step 1: Read Image
RGBI = imread('palmcontour.jpg');
figure, imshow(RGBI), title('original image');

R=RGBI(:,:,1);
G=RGBI(:,:,2);
B=RGBI(:,:,3);

figure, imshow(R), title('gary');
figure, imshow(G), title('gary');
figure, imshow(B), title('gary');


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clc;
close all;
clear;

%Step 1: Read Image
RGBI = imread('palmcontour.jpg');
figure, imshow(RGBI), title('original image');

R=RGBI(:,:,1);
G=RGBI(:,:,2);
B=RGBI(:,:,3);

% figure, imshow(R), title('gary');
% figure, imshow(G), title('gary');
% figure, imshow(B), title('gary');


hsv_image = rgb2hsv(RGBI);
figure, imshow(hsv_image), title('HSV');

H=hsv_image(:,:,1);
S=hsv_image(:,:,2);
V=hsv_image(:,:,3);

figure, imshow(H), title('H gary');
figure, imshow(S), title('S gary');
figure, imshow(V), title('V gary');

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===============================================

clc;
close all;
clear;

%Step 1: Read Image
RGBI = imread('palmcontour.jpg');
figure, imshow(RGBI), title('original image');

R=RGBI(:,:,1);
G=RGBI(:,:,2);
B=RGBI(:,:,3);

% figure, imshow(R), title('gary');
% figure, imshow(G), title('gary');
% figure, imshow(B), title('gary');


hsv_image = rgb2hsv(RGBI);
figure, imshow(hsv_image), title('HSV');

H=hsv_image(:,:,1);
S=hsv_image(:,:,2);
V=hsv_image(:,:,3);

% figure, imshow(H), title('H gary');
% figure, imshow(S), title('S gary');
% figure, imshow(V), title('V gary');


rgb = RGBI;

cform = makecform('srgb2lab');
lab = applycform(rgb,cform);
figure, imshow(lab), title('lab');

L=lab(:,:,1);
A=lab(:,:,2);
B=lab(:,:,3);

figure, imshow(L), title('l gary');
figure, imshow(A), title('a gary');
figure, imshow(B), title('b gary');

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================================================


clc;
close all;
clear;

%Step 1: Read Image
RGBI = imread('palmcontour.jpg');
figure, imshow(RGBI), title('original image');

R=RGBI(:,:,1);
G=RGBI(:,:,2);
B=RGBI(:,:,3);

% figure, imshow(R), title('gary');
% figure, imshow(G), title('gary');
% figure, imshow(B), title('gary');


hsv_image = rgb2hsv(RGBI);
figure, imshow(hsv_image), title('HSV');

H=uint8(hsv_image(:,:,1)*255);
S=uint8(hsv_image(:,:,2)*255);
V=uint8(hsv_image(:,:,3)*255);

BH=H<90;
figure, imshow(BH), title('BINARY H');

% figure, imshow(H), title('H gary');
% figure, imshow(S), title('S gary');
% figure, imshow(V), title('V gary');


rgb = RGBI;

cform = makecform('srgb2lab');
lab = applycform(rgb,cform);
figure, imshow(lab), title('lab');

L=lab(:,:,1);
A=lab(:,:,2);
B=lab(:,:,3);

figure, imshow(L), title('l gary');
figure, imshow(A), title('a gary');
figure, imshow(B), title('b gary');
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clc;
close all;
clear;

%Step 1: Read Image
RGBI = imread('palmcontour1.jpg');
figure, imshow(RGBI), title('original image');

R=RGBI(:,:,1);
G=RGBI(:,:,2);
B=RGBI(:,:,3);

% figure, imshow(R), title('gary');
% figure, imshow(G), title('gary');
% figure, imshow(B), title('gary');


hsv_image = rgb2hsv(RGBI);
figure, imshow(hsv_image), title('HSV');

H=uint8(hsv_image(:,:,1)*255);
S=uint8(hsv_image(:,:,2)*255);
V=uint8(hsv_image(:,:,3)*255);

BHh=H>230;
figure, imshow(BHh), title('BINARY Hh');

BHl=H<30;
figure, imshow(BHl), title('BINARY Hl');

BHt=or(BHh, BHl);
figure, imshow(BHt), title('BINARY Ht');

figure, imshow(H), title('H gary');
figure, imshow(S), title('S gary');
figure, imshow(V), title('V gary');


rgb = RGBI;

cform = makecform('srgb2lab');
lab = applycform(rgb,cform);
%figure, imshow(lab), title('lab');

L=lab(:,:,1);
A=lab(:,:,2);
B=lab(:,:,3);

% figure, imshow(L), title('l gary');
% figure, imshow(A), title('a gary');
% figure, imshow(B), title('b gary');
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close all;

originalRGB = imread('peppers.png');
imshow(originalRGB);

h = fspecial('motion', 50, 45);

filteredRGB = imfilter(originalRGB, h);
figure, imshow(filteredRGB);

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1. 滑鼠選取影像中的區塊
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close all;
clear;
clc;
load mandrill
% [X,map] = imread('eight.tif');
figure('color','k')
image(X)
colormap(map)
axis off          % Remove axis ticks and numbers
axis image        % Set aspect ratio to obtain square pixels

k = waitforbuttonpress;
point1 = get(gca,'CurrentPoint');    % button down detected
finalRect = rbbox;                   % return figure units
point2 = get(gca,'CurrentPoint');    % button up detected
point1 = point1(1,1:2);              % extract x and y
point2 = point2(1,1:2);
p1 = min(point1,point2);             % calculate locations
offset = abs(point1-point2);         % and dimensions
x = [p1(1) p1(1)+offset(1) p1(1)+offset(1) p1(1) p1(1)];
y = [p1(2) p1(2) p1(2)+offset(2) p1(2)+offset(2) p1(2)];
hold on
axis manual
plot(x,y)        

I=X(p1(1):p1(1)+offset(1),p1(2):p1(2)+offset(2),:);

figure('color','k')
image(I)
colormap(map)
axis off          % Remove axis ticks and numbers
axis image        % Set aspect ratio to obtain square pixels
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