Adobe Photoshop CS2 CLASSROOM IN A BOOK [Electronic resources] نسخه متنی

1.

Make sure that the Egret channel is selected and that the RGB channels are all hidden, or hide them now, as appropriate.

(If you left all of the channels selected, the colored egret image would appear with a red overlay.)

Look for any black or gray flecks within the body of the egret. You'll erase them by painting with white to increase the selected area. Remember these guidelines on editing a channel with a painting or editing tool:

Painting with white erases the mask and increases the selected area.

Painting with black adds to the mask and decreases the selected area.

Painting with gray values adds to or subtracts from the mask in varying opacity, in proportion to the level of gray used to paint: The darker the gray, the greater the opacity of the mask and the fewer number of pixels included in the selection.

2.

Zoom in if necessary to see the white egret area clearly.

3.

In the toolbox, select the Brush tool (), and make sure that white appears in the Foreground Color swatch. If it doesn't, click the Switch Foreground and Background Colors icon ().

4.

In the Brushes palette, select a small brush size, such as 3 or 5 pixels, and use it to paint out any black or gray flecks in the white egret.

Selection in channel

Painting out black or gray

5.

If any white or gray specks appear in the black area of the channel, switch to black as the foreground color and paint those spots. Remember that when you paint with black, you increase the masked area, which will decrease the selection.

6.

Dock the Brushes palette by dragging the tab into the palette well.

7.

Choose File > Save.