Canon CS-S 4.3 manual Enhancing Color Images, About Image Color and Color Channels

CONTENTS

GLOSSARY

INDEX

Chapter 5	63
Scanning Techniques

5.Click the Eyedropper tool on the point of the image you want to sample. That value is entered in the corresponding text box, and the image adjusts according to that value.

6.If the area of the image surrounding the sampled area changes tone as you expected, make a note of the settings. If the selected image area does not change tone as you expected, repeat this process until you get the results you want.

Enhancing Color Images

This is a brief discussion about color basics. There are many good books about working with graphic images. If you are using color imaging software such as Adobe Photoshop LE, your software documentation can provide you with more information to help you adjust your images when they have been scanned and acquired by the imaging software.

About Image Color and Color Channels

All printable colors can be created using a combination of the colors cyan, magenta, and yellow (CMY). (Black is often used in printing, so you may hear that colors are printed using the “colors” CMYK, the K stands for “Key color.”)

All colors displayed on monitors can be created using a combination of the colors red, green, and blue (RGB). Red, green, and blue can be thought of as complementary colors to cyan, magenta, and yellow-that is, the colors cancel each other out when combined in equal amounts. Similarly, adding a small amount of one color reduces its complement by that amount.

This complementary relationship between the colors cyan, magenta, and yellow and the colors red, green, and blue can be represented using a color wheel that indicates the possible colors and their opposites.

Green Yellow

Cyan Red

Blue Magenta

63