MATLAB从RGB到HSI

以下是将RGB转换为HSI的MATLAB代码：

% 输入RGB图像
rgbImage = imread('image.jpg');

% 将RGB图像转换为double类型
rgbImage = im2double(rgbImage);

% 分离RGB通道
redChannel = rgbImage(:, :, 1);
greenChannel = rgbImage(:, :, 2);
blueChannel = rgbImage(:, :, 3);

% 计算亮度分量
intensity = (redChannel + greenChannel + blueChannel) / 3;

% 计算饱和度分量
minChannel = min(min(redChannel, greenChannel), blueChannel);
saturation = 1 - (3 ./ (redChannel + greenChannel + blueChannel)) .* minChannel;

% 计算色调分量
numerator = 0.5 .* ((redChannel - greenChannel) + (redChannel - blueChannel));
denominator = sqrt((redChannel - greenChannel).^2 + (redChannel - blueChannel) .* (greenChannel - blueChannel));
hue = acos(numerator ./ (denominator + eps));

% 对Hue进行调整
if blueChannel > greenChannel
    hue = 2 * pi - hue;
end

% 将Hue、Saturation和Intensity合并为HSI图像
hsiImage = cat(3, hue, saturation, intensity);

% 显示HSI图像
imshow(hsiImage);