ActionScript 2.0 :: Flash To Recognize Color Data In An Image?

I have created a game that randomly loads in an image from an XML file. The image size is roughly 400x300 and loads up in the center of the stage. In the top corner of the game, there is a 50x50px box that loads the exact same image as the 400x300 one but it only shows a 50x50 part of that image. You need to click on the part of the image shown in the 50x50 box in the larger image to advance in the game.

What I've found after playtesting is certain parts of the image are extremely dark and make advancing near impossible without wildly clicking on the larger image in all the dark places.

Is there some way that flash can determine the color data of the image? Say, flash recognizes that there's too much black in the image so it skips it and goes to the next image.