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Image forming apparatus

An image and image information technology, applied in image communication, electrical recording process applying charge pattern, equipment for electrical recording process applying charge pattern, etc. Issues such as calculating toner consumption

Inactive Publication Date: 2006-01-11
SHARP KK
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Problems solved by technology

However, when the toner consumption characteristic changes from mechanical error and life etc. Figure 10 When the curve D shown by the solid line changes to the curve E shown by the dotted line, when only the color tone of the weighting coefficient table is increased, the change of the toner consumption characteristic cannot be followed, and the actual toner consumption characteristic The difference from the toner consumption calculated by the pixel count does not decrease, and there is a problem that the toner consumption cannot be calculated correctly

Method used

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Embodiment Construction

[0044] Hereinafter, embodiments of the present invention will be described with reference to the drawings for understanding of the present invention. In addition, the following embodiment is an example which actualized this invention, and does not limit the technical scope of this invention.

[0045] FIG. 1 is a control block diagram showing image processing in an image forming apparatus (digital electrophotographic apparatus) according to an embodiment of the present invention. As shown in FIG. 1 , in a digital electrophotographic device, it includes: an input signal processing unit 10; a region separation processing unit 20; a color correction and black generation processing unit 30; a zoom factor processing unit 40; a spatial filter processing unit 50; Correction processing section 60 ; pixel counting section 70 ; toner consumption calculation section (toner consumption calculation unit) 80 . Furthermore, in a digital electrophotographic apparatus, a digital input image si...

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Abstract

One embodiment is an image forming apparatus that digitally performs image processing and correction processing of image information, and calculates toner consumption by performing a pixel count of the input multi-level image includes a counting portion that counts, pixel by pixel, the input signal levels of an input multi-level image; a weighting coefficient table that stores weighting coefficients corresponding to the input signal levels; a weighting calculation portion that obtains from the weighting coefficient table weighting coefficients corresponding to the input signal levels and performs weighting of each pixel when counting the input signal levels with the counting portion; and a rewriting portion that rewrites the weighting coefficients stored in a weighting coefficient table.

Description

technical field [0001] The present invention relates to an image forming apparatus such as an electrophotographic transfer machine, a laser printer, and a facsimile apparatus that digitally performs image processing and correction processing on image information. Background technique [0002] Generally, in image processing in an electrophotographic device such as a digital copying machine, digital image signals input from an image input device such as a scanner are subjected to input signal processing, area separation processing, color correction processing, and black generation. After digital signal processing such as digital signal processing and zoom magnification processing, filtering processing by spatial filtering is performed, and halftone correction processing is performed, and output as an output image signal. [0003] FIG. 5 is a control block diagram of image processing in a conventional digital copier. That is, the input signal processing unit 110, the area sepa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/08
CPCG03G15/556H04N2201/0082G03G15/553H04N1/00015H04N1/4078H04N1/0005H04N1/00068H04N1/00002H04N1/40006
Inventor 今川真司河野浩史
Owner SHARP KK
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