Konica Minolta magicolor 8650 Service Manual page 149

22. Image processing
8. Temporarily stores the image data output from the frame memory.
9. Image data is expanded using the method opposite to that used in BTC compres-
sion.
10. The R, G, and B data are converted to the Y, M, C, and K density data. For PS
1
printing, multi-valued data of Y, M, C, and K are stored and there is no need of con-
verting or processing those data. Both PS and PCL printing perform masking pro-
cessing, which compensates for the deviation in the spectral reflection
characteristics of the toner, and UCR/BP processing.
11. Edge of letter and lineal drawing gets area discrimination and FEET processing is
conducted according to the discrimination result.
12. When FEET processing is conducted, interpolation is done so that no influence is
given to continuous gradation portion.
13. Makes the necessary corrections so that the printed gradations have linear charac-
teristics, since the image density of the input image data is not directly proportional
to that of the printed image because of the changing developing and PC drum char-
acteristics.
14. Creates the density distribution of a predetermined pattern to enable outstanding
gradation reproduction.
15. Image data of the file memory is developed to the frame memory and output delay
control for the interval of PC drums, Y, M, C, K is conducted.
16. Correct the shear in printing start position in the main scanning direction, which
occurs when each PH unit of Y, M, C, K is exposed on the PC drum. Adjust the pro-
cessing speed in the board (main scanning) to conform to the input processing
speed. The laser is emitted according to the laser intensity information.
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Theory of Operation Ver. 2.0 Nov. 2007