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Service Manual

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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of RICOH IS450 Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

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Text excerpt from page 34 (click to view)

22 December 1998

Gamma (γ) Correction γ The gamma curve corrects the response of the CCD to grayscales in the original. Grayscale Processing This process generates up to 256 image density levels for each pixel. Dithering Dither processing produces good quality grayscale images of photo originals. Error Diffusion The error diffusion process reduces the difference in contrast between light and dark areas of a halftone image. Each pixel is corrected using the difference between it and the surrounding pixels. The corrected pixels are then compared with a matrix table. Binary Picture Processing Each video signal level is converted from 8-bit to 1-bit (black and white image data) in accordance with a threshold value. White/Black Conversion
Inverts the image (converts from white to black and vice versa).

After video processing, the data goes to the host computer through the memory and SCSI controllers.


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