How to detect brightness of the image and adjust automatically?

I have a folder of images which contains different brightness images. From this folder, I want to identify those that are too bright or dull and automatically make adjustment to them. As for the rest of the images that meet the criteria will be left alone.

Thanks in advance.

Answer 1

[Sai Bhargav Avula]

If the files are sequentially named, then you can read them using the following code.

   path_directory='folder_name'; % 'Folder name' 

   original_files=dir(['path_directory '/*.jpg']); % for this case jpg 

   for k=1:length(original_files) 

      filename=fullfile('path_directory', original_files(k).name); 

      image_orginal=imread(filename);       % Image read is done 

    %%Image Operation as per your work 

  end 

The brightness of the image can be calculated by your definition of brightness. For example it can be calculated by the V color of the HSV color space

This goes below “%%Image Operation as per your work” in the code given above.

hsvImage = rgb2hsv(filnename);  % HSV color map convertion
brightness = hsvImage(:, 3); % calculating the 

Other way would be to find the mean of the image

brightness = mean2(filename); 

Using the brightness values the adjustments can be made for each image.