rgb1 = imread('test.png');
v = rgb1(60,60:120:360,1:3)
imshow(rgb1);
v(:,:,1) =
200 0 0
v(:,:,2) =
0 200 0
v(:,:,3) =
0 0 200
rgb2 = imread('gray.png');
v = rgb2(60,60:120:360)
imshow(rgb2);
v =
33 105 9
v = [ 101 173 53 ]
v =
101 173 53
rgb3 = imread('test2.png');
v3 = rgb3(60,15:30:360)
imshow(rgb3);
v3 =
0 21 42 63 85 106 127 148 170 191 212 233
rgb4 = imread('gray2.png');
v4 = rgb4(60,15:30:360)
imshow(rgb4);
v4 =
0 2 6 13 23 37 54 75 103 133 168 208
plot(v3,v4);
xlabel('color png');
ylabel('Java converted grayscale');
v = [0.2989 0.5870 0.1140];
sum(v)
nv = round(v*1024)
sum(nv)
ans =
0.9999
nv =
306 601 117
ans =
1024