摘要:
In forming a multi-colored image by superimposing a plurality of plane images, positional offsets of the plane images are prevented, thereby obtaining high quality color images. The timing at which image data corresponding to each plane image is generated is controlled in accordance with the phase difference between the sub-scanning start signal indicating the rotational timing of an image carrier and the main-scanning start signal representing the rotational timing of a rotating polygonal mirror. Various controls are further performed.
摘要:
An image processor includes a first reader which obtains a first signal corresponding to visible information read on an original, and a second reader which obtains a second signal corresponding to invisible information on the original. A comparator compares the first and second signals to discriminate a predetermined pattern on the original.
摘要:
An image processing apparatus and method includes a device for judging the degree of color or lack of color of an input color image signal, judging dot areas in input color image signal and controlling a spacial filter or a density conversion device for processing the input image signal according to a judgment by the first and second judging results, the spacial filter or the density conversion device being controlled according to the judgment by the first and second judging results, wherein the image processing also includes the ability to independently set sharpness of each of a plurality of color component signals.
摘要:
An image signal that enters line by line is subjected to italicization processing in a zoom unit. When an input image signal is stored in memory, a controller performs control in such a manner that the write starting address is changed, line by line, in dependence upon angle of italicization (amount of image inclination) and zoom rate.
摘要:
It is an object to identify a failed portion in a circuit for image processing and notify a service center of the failed portion, thereby enabling the failed circuit to be promptly replaced. Circuit portions of image processing units are constructed on separate substrates. As processing routes of an image signal which is inputted from an A/D converting unit, a route in which the image signal passes through a given circuit portion and a route in which the image signal doesn't pass therethrough are set. Data of a predetermined pattern is processed by those processing routes. The presence or absence of a failure of each circuit portion is discriminated from the processing results. The discrimination result is transmitted to an external apparatus installed in a service center.
摘要:
To properly cut light except for visible light and improve read precision, there is provided an image reading apparatus having a plurality of photoelectric conversion elements. The image reading apparatus includes an image information detecting unit in which the photoelectric conversion elements are arranged on a single chip, a first light-shielding unit, arranged near the photoelectric conversion elements, for transmitting specific visible light, and a second light-shielding unit, arranged near the photoelectric conversion elements at a position different from that of the first light-shielding unit, for partially shielding light except for the visible light.
摘要:
A color image processing apparatus for sequentially inputting image data which corresponds to each of a plurality of color components in units of pixels of a predetermined quantity, delaying, with respect to a reference phase, at least the first color component or the last color component and sequentially forming image in the units of pixels of a predetermined quantity in accordance with the delay.
摘要:
An image processing apparatus includes a first judgment circuit for judging whether an input image is a monochrome image or a color image on the basis of an input image signal, and a second judgment circuit for judging whether a pixel represented by the input image signal is part of a character which is black. In an image processing method, a judgment is made as to whether an input image is a monochrome image or a color image on the basis of an input image signal, and a judgment is made as to whether a pixel represented by the input image signal is part of a character which is black.
摘要:
An image reader comprises a platen on which an original is to be placed, a read unit for reading an image of the original placed on the platen, a first standard member having even density, a second standard member having even density and provided at a position different from the first standard member, a correction unit for correcting unevenness of a video signal resulted from reading the image of the original by the read unit on the basis of a first standard signal resulted from reading the first standard member by the read unit, and a compensation unit for compensating correction operation made by the correction unit on the basis of a second standard signal resulted from reading the second standard member by the read unit. The reader may also comprise an authorization unit for authorizing the compensation operation by the compensation unit. With the reader, unevenness of the video signal is always automatically corrected with satisfactory results.
摘要:
An image processing apparatus includes an input unit for inputting an image signal, a conversion unit for converting the image signal input from the input unit and outputting the converted image signal, and an output unit for outputting a pulse-width modulation signal based on the converted image signal output from the conversion unit. The output unit is operated in a fixed period processing mode regardless of an output characteristic of the pulse-width modulation signal, and outputs the pulse-width modulation signal. The conversion unit switches a conversion mode of the input image signal in association with the output characteristic of the pulse-width modulation signal.