How to truncate the image values so they stay in the [0 255] range

This is my current code:

function newImg = adjust_img(current_img)
  for current_img>255
      new=255;
      newImg=new;
  end
  for current_img<0
    new=0
    newImg=new
end

Answer 1

[Walter Roberson]

newImg = max(0, min(255, current_img));

after which you will probably want to uint8() the result which would probably otherwise be class double()

On the other hand if you are going to uint8() the result of the above, you could replace the whole thing with

newImg = uint8(current_img);

as uint8() will make any negative values into 0 and make anything over 255 into 255.