write an example of matlab codes to design and apply a 2-D LUT

% Example MATLAB code to design and apply a 2-D LUT

% Define the input image input_image = imread('input_image.jpg');

% Define the size of the LUT lut_size = 256;

% Define the input and output ranges input_range = [0 255]; output_range = [0 255];

% Generate the LUT lut = zeros(lut_size, lut_size); for i = 1 : lut_size for j = 1 : lut_size % Calculate the output value for the current input value input_value = (i - 1) * (input_range(2) - input_range(1)) / (lut_size - 1) + input_range(1); output_value = (j - 1) * (output_range(2) - output_range(1)) / (lut_size - 1) + output_range(1); lut(i, j) = min(max(round(output_value), output_range(1)), output_range(2)); end end

% Apply the LUT to the input image output_image = zeros(size(input_image)); for i = 1 : size(input_image, 1) for j = 1 : size(input_image, 2) input_index = round((double(input_image(i, j)) - input_range(1)) / (input_range(2) - input_range(1)) * (lut_size - 1)) + 1; output_index = lut(input_index, input_index); output_image(i, j) = output_index; end end

% Display the input and output images figure(1); subplot(1, 2, 1); imshow(input_image); title('Input Image'); subplot(1, 2, 2); imshow(output_image); title('Output Image')