Avision BS-1708B User Manual

User’s ManualSensitivity of Dynamic ThresholdOccasionally your scanned image maycontain small dots or speckles. To removethese spots, increase the sensitivity valueby moving the bar to the right. The valueranges from 1 to 30. The default is 20.Fixed Processing: Used forblack-and-white and other high contrastdocuments. A single level is set todetermine the black-and-white transition.The threshold is programmable over theentire density range. Fixed Processingsets Contrast to 0. If Fixed Processing isselected, Contrast is not available.Halftone: In addition to the black andwhite display, Halftone can present asomehow gray shade of image by usingdifferent size of dots. Halftone image lookslike the picture we have seen in thenewspaper. Options include Halftone 1,Halftone 2, Halftone 3, Halftone 4,Halftone 5.Error Diffusion: Error Diffusion is a typeof Halftone. Error Diffusion gives goodimage texture and makes text in imagesmore readable than Halftone.3-13