Toshiba e-studio 202L, Service Manual, Page: 190 / 354

e-STUDIO200L/202L/230/232/280/282 IMAGE PROCESSING June 2004 © TOSHIBA TEC
7 - 6
2) Image memory editing
This function performs editing such as enlargement/reduction, mirror imaging, etc., by using a line
memory. Pixel data for one line in the primary scanning direction is stored in the line memory and
the memory is renewed at each line.
- Enlargement/Reduction
Enlargement/Reduction is accomplished by using the line memory control function in the process
of the image processing operation.
<Example> Enlargement
<Example> Reduction
Fig. 7-7
- Mirror imaging
This is accomplished by reading and outputting data from its end.
3) Editing processing
This function performs trimming and masking.
- Trimming
Using rectangular area signals, the image signals inside the rectangular area are left and the
other image signals are eliminated.
- Masking
Using rectangular area signals, the image data inside the rectangular area are erased.
- Negative/positive reversing
This function reverses the entire date from negative to positive or vice versa.
4) 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.
5) Gradation processing
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 gradation reproducibility such as for
photographic images.
1 100%
200%
2 3 4 5 6 7 8 9 10
1 1 2 2 3 3 4 4 5 5
1 100%
50%
2 3 4 5 6 7 8 9 10
1 3 5 7 9