Color image forming apparatus and method

Abstract

The invention provides an image forming device and an image forming method. It is determined whether the pixel of interest in image data to be processed belongs to area 1 not close to a scan line changing point where a scan line changing process is done (S101). If the pixel of interest belongs to area 1, an error diffusion process is performed using an error diffusion matrix for area 1 (S102). Ifthe pixel of interest belongs to area 2 close to the scan line changing point, the error diffusion process is performing using an error diffusion matrix for downward scan line changing for area 2 when the scan line changing process is changing to a lower line, or an error diffusion matrix for upward scan line changing for area 2 when the scan line changing process is changing to an upper line.

Description

Technical field [0001] The present invention involves image formation devices and image formation methods. More specifically, it involves a color image formation device and color image formation method.) Digital copy or multifunctional printer (MFP) used by electronic camera processing. Background technique [0002] As a color image forming device (such as a printer or a copy), it is known that a inline color image formation device includes an electronic camera formation unit with a number of color components.The color regulator of each color component is transferred to the printing medium.The formation unit of various color images includes a visual unit and a sensitivity drum.It is known that the position error between images that cause various color components (referred to as registry error) with various color components. [0003] These factors include: the unevenness and attachment position error of the lens group of the optical system of multi -angle mirrors, Fθ lens, etc., ...

AI Technical Summary

Problems solved by technology

However, this scan line switching process is completed in units of one pixel, so an offset of less than one pixel remains in the sub-scanning direction

However, depending on the image forming method of the image data for performing registration error correction, if the correction of more than one pixel and the correction of less than one pixel are directly performed on the image data, the image deteriorates

Therefore, a correction of more than one pixel at a scan line changing point does not match the error distribution, and the mismatch manifests itself as density unevenness or texture, degrading image quality

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