文档介绍：242 Alternative Digital Photography
Figure The mand selection in Photoshop. Figure The resulting inverted image.
Figure shows how to call the Levels function. It is best to do it as an adjustment
layer so that you can modify it until you get it exactly right. Select Layer > New
Adjustment Layer > Levels. The Levels dialog box pops up (see Figure ). Move the
right triangle (the white triangle) to the edge of the main black curve (as seen in
Figure ). Then do the same for the left triangle (the black triangle). In this case,
the black triangle does not need to be moved.
Now adjust the middle gray triangle until the colors are deep, as seen in Figure .
This usually happens when the gray triangle is placed in the middle of the large black
mass at a kind of balance point. This balance point means that the total mass of the
figure is balanced on the gray triangle. This is a good starting point. The final figure is
shown in Figure .
Color Negative 243
Figure Calling up the Levels function. Figure The Levels dialog box pops up. The right triangle
(white triangle) is being adjusted to the edge of the main black curve.
Figure Adjust the center gray triangle until the colors Figure This is the final resulting image after the adjustments have been
are deep. made.
244 Alternative Digital Photography
Lesson —Color Negative with a Digital
Camera
As mentioned at the beginning of this chapter, some digital cameras such as many in
the Sony Mavica line have a color negative function. You simply set a control, and you
can photograph and generate the images without having to use the Photoshop tech-
nique shown in Lesson . The reason that this is useful is not that the Photoshop
technique is so difficult, but rather that not all subjects are as suitable for this tech-
nique. With a Mavica (shown in Figure ) or similar camera, especially those with
electronic viewfinders, you