for displaying photographs on a computer display it is recommended to adjust brightness and contrast in a way, so that as many as possible different levels of brightness can be differentiated between black and white. the image on the right shows many equally wide small stripes going from white to black. now try to modify the settings for brightness and contrast, so that you can distiniguish as many as possible of those stripes. while doing this, keep in mind that at the end black should still be black and white still be white and none of them only some shade of gray. maybe you can improve the quality in which images are displayed on your computer somewhat this way.
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