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Error diffusion
The purpose of this technique is to minimize the average error between read and printed densities. Density data for adjacent pixels is modified by diffusing errors on the objective pixel into several pixels, which are then binarized. This maintains high grayscale levels and resolution during reading, while suppressing more patterns by dotted halftone images such as newspaper photographs.
FB
In this manual, FB means flat bed.
Filtering
A correction method that improves the read quality of handwritten documents. The read quality of images written in pencil or
Front-side reading = Front-side scanning
Refers to reading the front side of the document, specifically in Duplex reading mode.
Halftone processing
Any method used to reproduce a photograph which includes a shade as an image composed of dots, namely, a binary image. Dithering and error diffusion processing are examples of halftone processing.
Hexadecimal
A
Image emphasis
Density is decreased for lighter but not completely white areas adjacent to black areas. Weakening this emphasis eliminates spot noise or produces softened images.