To see what is not there

Looking at two figures, one a representative of a white 12 sided figure and the other a black filled outline of the same sitting by it, my eyes saw lined in the outline though none existed.  I am familiar with such 12 sided figures being dice so perhaps it was that familiarity that led me to see lines where there was none, even though I knew otherwise.  It may also have been because of the proximity of the shape that had those lines, or a combination of the two.  I find it interesting that you can see what is not there.  Another example of this is when you take a picture of a white object outside on a sunlit day and do not adjust the camera to take that into account.  The camera sees the object as bluish while your eye sees it as white.  Your mind adjusts the color of the image to account for sunlight just like an adjustment on the camera even though the item actually is bluish looking because of the effects of sunlight.