Toshiba 3511, 4511 manual Paper

7

(8)Gamma correction

This function corrects the input/output characteristics of the scanner/printer and adjusts the image signals so that the input/output characteristics would match with the copy mode.

(9)Gradation processing

In case of color copying, this function switches the type of gradation processing depending on the copy mode: A type which selects the printer characteristics giving the priority to resolution such as for text data, and another which selects the printer characteristics giving the priority to reproducibility of gradation such as for photographic images.

In case of black copying, this function selects the gradation processing which reproduces the halftone image such as photograph more precisely. Also the gradation processing which makes text data clearer is selected in black copying mode.

(10)Compression/expansion

To lessen the data amount of the color image signals, this function effects the compression/expansion on the data.

(11)Scanner high quality image processing

This function corrects the image signals scanned by the scanner and reproduces them in a higher image quality.

(12)Printer high quality image processing

This function reproduces the image signals output from the printer controller in a higher image quality.

(13)Black over print (Post Script)

When black data of text or graphic object are formed on a certain background with no written data underneath them, the color of the paper comes out around the black data when “out-of-color registration” is occurring. To prevent this phenomenon, this process enables to keep the background color around the black data formed as a part of the text or the graphic object on the printer data.

	Ideal image	Out of color registration		Black over print
Black data		Black data	Black data

Paper	Paper	Background	Paper
Background		Background

Fig. 7-305

e-STUDIO3511/4511 IMAGE PROCESSING 7 - 8 November 2003 © TOSHIBA TEC