Microtek ScanMaker 5 User's Guide download pdf (Page 121)

Reference: The Settings Window 6-43

• Customized 256 color option lets you select the attributes of indexed color.

If this option is selected, the following dialog box displayed.

Palette

Lets you choose the method of creating color palette table. “Uniform” uses 6-6-6

levels fixed color palette table, independent of the contents of the 24-bit RGB

image. By default, the “Adaptive” is selected, this option creates color palette

table from commonly used areas of the color spectrum that appears in the

image. Since colors in most images are concentrated in particular areas of the

spectrum, this option is generally used.

Dither

Lets you choose the dithering method. Dithering can further improves the 256-

index color image quality by mixing the available colors to simulate the missing

colors. “None” disables dithering; “Pattern” uses a structured pattern to simulate

the missing colors, this option is grayed out for Adaptive palette; and

“Diffusion”, which is the default, produces the best quality of 256-indexed color

image with lowering a little bit the scanning speed due to intensive algorithm

computation is required.

• Default attribute of 256-color is the last customized 256-color setting.

• B&W Diffusion image type is 1-bit B&W image dithered with error diffu-

sion effect.

Save As 256 color

You may save the palette and Dither selections as the defaulted 256 colors, to be

selected from the Type menu.

1 2 ... 116 117 118 119 120 121 122 123 124 125 126 ... 221 222

No comments

Microtek ScanMaker 5 User's Guide Page 121