Kodak INNOVATION A-61506 User Manual download pdf (Page 25)

24 A-61506 September 2006

Appendix A Color Concepts

What is a color

image?

A digital color image contains information about a scanned document

subdivided into many small regions called pixels (picture elements).

Each pixel is represented as a 24-bit value. These 24 bits are used to

indicate the amount of red, green and blue for each pixel. Pixels are

arranged in a matrix to collectively represent the image. Each pixel

represents a single color, present at that location in the image.

What is a color table? The color cameras in a scanner typically deliver three channels of data

to the image processing system, representing the Red, Green, and

Blue content of the image.

This raw data can then be fine-tuned to more closely represent the

original document by mapping raw input colors to the desired output

colors. This is usually done with a color table. The color table is simply

a list of input values matched to the desired output colors.

What is the

Brightness and

Contrast Control?

The purpose of the Brightness and Contrast Control is to provide a tool

whereby a user can adapt or develop a custom color table for a Kodak

Innovation Series Scanner, to suit the needs of a particular application.

The Brightness and Contrast Control provides a graphical user

interface which allows the user to preview the effect a color table will

have on a representative customer image. It can acquire a

representative image from the Kodak Innovation Series Scanner or

load it from a file. The utility provides tools which permit creating,

modifying and saving custom color tables.

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Kodak INNOVATION A-61506 User Manual Page 25