Image forming apparatus

Abstract

In one embodiment, 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 an input multilevel image, includes a counting portion that counts, pixel by pixel, the input signal levels of an input multilevel image; a weighting coefficient table that stores weighting coefficients corresponding to the input signal levels; a weighting calculation portion that obtains weighting coefficients corresponding to the input signal levels from the weighting coefficient table 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 the weighting coefficient table; in which a process control is performed when the calculated toner consumption reaches a predetermined value.

Description

[0001] This application claims priority from Patent Application No. 2005-14481 filed in Japan on January 21, 2005, the entire contents of which are hereby incorporated by reference. technical field [0002] The present invention relates to an image forming apparatus such as a copying machine, a laser printer, a facsimile apparatus, etc., using an electrophotographic system in which imaging processing and correction processing of image information are performed digitally. Background technique [0003] Generally, with image processing in an electrophotographic device such as a digital copier, a digital image signal input from an image input device such as a scanner is subjected to processes such as input signal processing, region separation processing, color correction processing, etc. , black generation processing, zooming processing, and other digital signal processing, and then filtering processing using a spatial filter, and halftone correction processing are performed, and...

AI Technical Summary

Problems solved by technology

However, when toner characteristics vary from Figure 12 When the curve D indicated by the solid line in the center changes to the curve E shown by the dotted line, it is impossible to follow this change in the toner consumption simply by increasing the number of stages of the weighting coefficient, but the calculation will be different from the actual toner consumption. Inaccurate toner consumption with different consumption

When processing control is performed based on an inaccurate toner consumption amount, for example, when the calculated toner consumption amount is smaller than the actual toner consumption amount, there is a problem that the timing of the processing control becomes too late, making it impossible to keep the density of the output image constant

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