Canon CS-S 4.3 manual To set scanning mode

CONTENTS	Chapter 3	26
	Scanning
GLOSSARY

INDEX

To set scanning mode:

1.Click the Main tab.

2.Select an option from the Scan Mode list. You have the following choices:

•Color (36 bit): 36 bit color images contain 12 bits per pixel for each primary color (red, green, blue). Use this option to attain a scanned color image of the highest quality. However, the file will be approximately twice the size of a Color (24 bit) file.

•Color (24 bit): 24 bit color images contain 8 bits per pixel for each primary color. Use this option to attain a scanned color image of average quality.

•Grayscale (12 bit): 12 bit grayscale images contain 12 bits per pixel. Use this option to attain a scanned grayscale image of the highest quality. However, the file will be approximately twice the size of a Grayscale (8 bit) file.

•Grayscale (8 bit): 8 bit grayscale images contain 8 bits per pixel. Use this option to attain a grayscale image of average quality.

•Black and White: Images are expressed in two colors only; black or white. A pixel is set to black or white depending on its brightness value in relation to a particular threshold value. The threshold value can be freely set. Select this option to print photographs on monochrome printers.

•Text Enhanced: Text Enhanced images are Grayscale images (8 bits per pixel) converted to Black and White (1 bit per pixel) using Canon ImageTrust technology. You can select Text Enhanced in the Scan Mode list. If the application operates in windowless (UI-less) mode, you can select “Text Enhanced” in the Preferences tab, and request the application to perform a Black and White scan. In this case, the conversion to Black and White takes place automatically.

The acquiring application may determine your Scan Mode choice. For example, if a fax application is acquiring the image, you may not be able to choose a color mode; you may have to choose Black and White or Grayscale.

The 24 bit and 36 bit options express colors with conversions of each primary RGB color (Red, Green, Blue). The 24 bit options can express each color with up to 256 gradations, and 36 bit color with up to 4,096 gradations. If you need extremely high-quality color gradation in the scanned image, use 36 bit color. Otherwise, use 24 bit for normal color scanning jobs.

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