cvLabMATLAB/cutColorImageMargin.m at main · ComputerVisionLaboratory/cvLabMATLAB · GitHub

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function cutRect = cutColorImageMargin(img)
    height = size(img, 1);
    width = size(img, 2);
    margin = img(:, :, 1) == 255 & img(:, :, 2) == 255 & img(:, :, 3) == 255;

    tmp = margin(:, :);
    flag1 = true;
    flag2 = true;
    breakFlag = false;
    for i = 1:width
        for j = 1:height
            if flag1 == true
                if tmp(j, i) ~= 1
                    startPoint{1} = j;
                    startPoint{2} = i;
                    flag1 = false;
                end
            end
            if flag2 == true
                if tmp(height - j + 1, width - i + 1) ~= 1
                    endPoint{1} = height - j + 1;
                    endPoint{2} = width - i + 1;
                    flag2 = false;
                end
            end
            if flag1 == false && flag2 ==false
                breakFlag = true;
            end

        end
        if breakFlag == true
            break;
        end
    end
    cutRect = img(startPoint{1}:endPoint{1}, startPoint{2}:endPoint{2}, :);
end