颜色查找矩阵LUT代码实现 MATLAB

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于 2022-11-03 11:47:24 发布 · 617 阅读

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#matlab #矩阵

生成lut图

lut = zeros(512, 512, 3);

for by = 1 : 8
    for bx = 1 : 8
        b = 4 * ((by-1) * 8 + bx);
        for gi = 1 : 64
            for ri = 1 : 64
                r = ri * 4;
                g = gi * 4;
                x = (bx - 1) * 64 + ri;
                y = (by - 1) * 64 + gi;
                lut(y, x, 1) = r;
                lut(y, x, 2) = g;
                lut(y, x, 3) = b;
            end
        end
    end
end

figure,imshow(uint8(lut));
imwrite(uint8(lut), 'lut.bmp');

导入原始图片以及lut图进行转换

img = double(imread('caicai.jpeg'));
lut = double(imread('lut.bmp'));

[m, n, ~] = size(img);
dst_img = zeros(m, n, 3);


for i = 1 : m
    for j = 1 : n
        r = img(i, j, 1);
        g = img(i, j, 2);
        b = img(i, j, 3);
        
        block_num = floor(