Graphics Programs Reference
In-Depth Information
In the previous image, there are three small triangles under the histogram. If we move the
one on the left toward the center to the inflection point (where the curve abruptly changes
direction) in the histogram, we are effectively discarding the image data to the left of the
triangle.
If you hold down the
Alt
key while you move the left triangle, the image will turn to a
white screen and you will see some image details as you move the triangle toward the cen-
ter. The detail that you see is the image data that you will discard as a result of moving the
slider. This doesn't mean that you won't see that specific detail in your image — just some
of the tones and color variations will disappear.
