Riso 9630R User Manual page 115

• The line smoothing function's image processing
is inversely proportional to processing speed
(print speed). The higher the image quality, the
lower the print speed.
Screening
Specify the halftone processing method.
Halftone is a processing method that varies the density
and size of ink dots printed on paper to give the
appearance of continuous color gradation when only
using a limited number of inks.
[Error Diffusion]
This function expresses gradation by changing the
density of dots. The higher the density, the darker the
gradation. The lower the density, the lighter the
gradation.
[Dot Process (140 lpi)], [Dot Process (200 lpi)]
(When [Color Mode] is set to [Black])
[Dot Process (70 lpi)], [Dot Process (100 lpi)]
(When [Color Mode] is set to other than [Black])
This function expresses gradation by changing the size
of the dots. The larger the dots, the darker the gradation.
The smaller the dots, the lighter the gradation. A dot
process of 100 or 200 lines per inch provides more
detailed images.
(Image)
70 lines per inch
Gamma Correction
Use this function to adjust the lightness, chroma,
contrast, and gamma value of red, green, and blue.
• [Gamma Correction] and [Blank Page
Detection] cannot be used together. (p. 3-30
"Blank Page Detection")
Select the [Gamma Correction] check box and click
[Details] to display the [Gamma Correction] dialog box.
Enter a value between -25 and +25 for each item.
[Lightness]
The larger the value, the brighter (whitish) the color.
[Chroma]
The smaller the value, the more washed-out the color.
The larger the value, the more vivid the color.
[Contrast]
Adjusts the ratio of brightness to darkness.
The smaller the value, the lower the contrast. The larger
the value, the higher the contrast.
[Red], [Green], [Blue]
Corrects the gamma value of each color.
The smaller the value, the weaker the color. The larger
the value, the stronger the color.
Printer Driver Settings
100 lines per inch
(Enlarged image)
ComColor GD Series User's Guide
3
3-25