Toshiba E-STUDIO900 Copier User Manual


 
PTM 2-18 B070/B071
2.3.3 IMAGE PROCESSING FLOW
Image processing is done by the IPU (Image Processing Unit), following the steps
shown below.
Overall image processing for this machine is designed to:
Target edges with filters to improve the angles of text characters and reduce the
occurrence of moiré filled areas.
Improve the evenness of granular areas in images
Shading Correction
Corrects the dispersion of the scanning
lens and CCD.
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Gamma Correction Background erase
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Pre-Filter Reduces the occurrence of moiré.
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Main Scan Magnification
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Auto Select
Determines if an image is text or raster
image data and processes the data
accordingly.
Selects the best methods for Filtering,
Density Control, and Grayscale
Processing.
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Filtering
MTF and smoothing (MTF filter of
previous machines)
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Either of two filters is selected by Auto
Select above.
Independent Dot Erase Removes isolated pixels.
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Line Width Correction
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Density Control
Employs one of two gamma tables,
selected by Auto Select above
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Grayscale Processing
Error diffusion, dithering, or binary picture
processing
Black-and-white digitization or dithering is
selected by “Auto Select above.
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Video Path
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Application (printer)
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LD Unit