Chapter 44-214.5.6 Controlling the Image Memory(iR105)0006-9800iR105The binary image data is controlled in image memory as follows:Compression/Expansion, Rotation, and Enlargement/ReductionBinary images are processed for compression/expansion (for electronic sorting), rotation, or resolution conversion.SDRAMThe image data is temporarily stored as part of image memory control.4.5.7 Reader Unit Input Image Processing0008-2267iR105i/iR105+ / iR9070 / iR8070The image data colleted by the contact image sensor is processed by the main controller PCB.F-4-214.5.8 Output Image Processing(iR105)0006-9804iR105The output image data sent to the printer unit is processed as follows:Smoothinga. Read Image OutputIn the case of text/print photo mode, the 600 x 600-dpi input images are subjected to smoothing for conversion into 1200-equivalent x 600dpi images.In smoothing, the image data is compared to several hundred templates of 7 x 7-pixel matrices for replacing of pixels in question.Notch processing is also performed in this block, as a pattern unique to read images.b. Printer (PDL) Image OutputSmoothing most suited to PDL is performed, converting 300 x 300-dpi or 600 x 600-dpi data into 2400-equivalent x 600-dpi data.Thickening (PDL output only)If selected using a printer driver, thickening is performed to thicken fine lines for better reproduction.PDL output images are thickened by adding 1/2 pixels (1200 dpi) to the top of a horizontal line or 1/2 pixels (1200 dpi) to the right of a vertical line.Binary-Binary Conversion (read image output only)Binary-binary density conversion is used as an auxiliary means to correct density during copying operation.Film photo modeBinary processing (screen processing)Binary processing (error diffusion)To compression/expansion/editing blockEdge emphasisEnlargement/reductionText modeText/photo/film photo mode-intensify-to-density conversion-density adjustment (F adjustment)-gamma correctionMain controller PCBReader unit
