CHAPTER 4 IMAGE PROCESSING SYSTEM4-12 COPYRIGHT © 2000 CANON INC. CANON imageRUNNER 600 REV.1 JAN. 2000 PRINTED IN U.S.A.F. Density Processing1. OutlineThe digital image processing block performs the following density processing:[1] LOG conversion Part 2>Chapter 3>2.4.1[2] Density correction Part 2>Chapter 3>2.4.4[3] AE processing Part 2>Chapter 3>2.5.2[4] Density adjustment Part 2>Chapter 3>2.4.3[5] Density adjustment during printingOf the foregoing functions, 1. through 4. are performed when scanner input image data is beingread, and 5. is performed when printing scanner input image data/PDL input image data.Figure 4-304 Flow of Density ProcessingEdge emphasisLOG conversion (LOG table)Density adjustment (F value table)AE processing (AE table)Binary processingMultiple-value dataBinary dataDensity adjustment ( table)Density adjustmentwhen reading dataDensity adjustment (laser power/developing bias)Density adjustmentwhen printing dataSelects a table to suit the text, text/photo,or photo mode setting.Converts image signals possessing intensitydata representing reflected light into imagesignals possessing data representing tonerdensity.Identifies the type of original bypre-scanning, and selects the best AEtable. (AE with priority on image quality)Selects an F value table to suit the CopyDensity key setting on the control panel.
