Abstract: In the present invention, in a color copy machine, original modes of copy job units, and setting changes of sharpness adjustment, whose updates are permitted beforehand, are totaled, change of default is judged, when this accumulated result is larger than a threshold value, and the original mode whose accumulated result is larger than the threshold value, and the sharpness adjustment are set to change a default state of an image processing unit.

Abstract: In an image processing apparatus using a four-channel output CCD, a deviation in left-and-right CCD characteristics is detected and the deviation is corrected, thereby to reproduce uniform image density free from a density error between left and right portions of a screen with respect to a center of the screen. A gray-scale pattern image is read by a scanner in a gray-scale pattern read-out mode. Deviations in left and right CCD portions are detected for respective gray scales of the gray-scale pattern image. In accordance with the magnitude of the deviations, a correction amount is determined. The correction amount is set in a left-and-right correction circuit whereby image density correction is made for each gray scale.

Abstract: An image processing apparatus includes an discrimination unit to discriminate an image sort of provided image data and output discrimination information, a memory unit to store processing information including the discrimination information with image data, an image processing unit to read out the processing information and the image data and perform image processing indicated by the processing information for each domain of the image data in response to a sort of the processing information, and an image forming unit to perform image formation on an image recording medium on the basis of the image data provided with the image processing.

Abstract: An image processing apparatus for processing original image data, having a given density range, with a predetermined manner to provide processed image data, comprising means for correcting the density range of the image data to provide density-range-corrected image data corresponding to a distribution of the density of the image data, means for filtering the image data to generate filtered image data, means for synthesizing the density-range-corrected image data provided by the correcting means and the filtered image data provided by the filtering means so as to provide synthesized image data, and means for selecting either one of the density-range-corrected image data provided by the correcting means and the synthesized image data provided by the synthesizing means, in accordance with the density range of the density-range-corrected image data, so as to provide selected image data as the processed image data.

Abstract: An image forming apparatus includes a first scanning function for radiating light to a target area including an original image area, scanning the target area in a predetermined direction, and converting an optical image obtained by scanning to an electrical signal. A second scanning function is provided for radiating light to the target area including the original image area, scanning the target area in a direction perpendicular to the direction in which the first scanning function scans, and converting an optical image obtained by scanning to an electrical signal. A function means converts the electrical signals converted by the first and second scanning functions to digital signals.

Abstract: A copier when its automatic detecting function has determined that it is possible to combine multiple documents, combines the multiple documents into a composite image and copies the image on an output sheet in continuously copying documents of different sizes using an automatic document feeder. The copier detects based on the document size, the reduction rate of the document and the size of an image bearing member whether or not it is possible to combine the reduced images of the following and later documents and copy the resulting image, and contains an image memory for storing the composite image of the documents. In an image forming apparatus, documents of different sizes are checked one by one according to their document size and reduction rate and continuous copying is done in the form of a composite image.

Abstract: An image forming apparatus is provided which includes first and second copy-start keys. The first key remains continuously in the enabled state, while the second key is normally in the disabled state. The second key is enabled only when an inputted ID number is identical to a registered ID number previously stored in the apparatus.