function grayscale_image = lab1_ex1(input_file_path, output_file_path)
% Basic Image Processing and Analysis, 2016.
% solution function for lab1 / exercise1
    
    color_image = imread(input_file_path);
    figure;
    subplot(1, 2, 1);
    imshow(color_image);
    if size(color_image, 3)>1
        grayscale_image = rgb2gray(color_image);
    else
        grayscale_image = color_image;
    end
    subplot(1, 2, 2);
    imshow(grayscale_image);
    imwrite(grayscale_image, output_file_path);
    
end