摘要:
In an image forming apparatus according to the present invention, characteristics correcting data for correcting input gray level-output gray level characteristics for each of a plurality of steps into which input gray levels are divided are inputted by inputting means. At the time of image formation processing, input gray level-output gray level characteristic data are corrected on the basis of each of the characteristics correcting data (Sft) inputted by the inputting means.
摘要:
The memory area of an image memory 3 is divided into a plurality of areas (PL0 - PL3) for separetely storing yellow, magenta, cyan and block data constituting a full color image, and the stored color data are read out to form a full color image 3a on a sheet of paper. In forming a mono color image, mono color data are stored in the entire memory area. An image forming apparatus is thus realized which is capable of arbitrarily composing images with a small memory capacity.
摘要:
A color correcting device for applying a color correction to an image data made up of color components of three primary colors and read by a color image reader means, the device includes: an image data extractor for extracting an image data of a predetermined color to be corrected based on a density balance of the respective color components of three primary colors, and a corrector for correcting a density level of a specified color component set in advance in correspondence with the color to be corrected, out of the color components of the extracted image data, to a predetermined density level.
摘要:
Disclosed is an apparatus for detecting pixels in a dotted image area (dotted area pixels). Image data corresponding to each of pixels is coded into one of a predetermined number of discrete values. The distance between change points at which the value of the pixel after the coding is changed from a first value to a second value is detected. Further, it is examined whether or not periodicity is recognized in the distance between the change points in the vicinity of a target pixel. If periodicity is recognized in the distance between the change points, it is judged that the target pixel may constitute a dotted image area.
摘要:
The present invention relates to a color correcting device and a color correcting method in an image forming apparatus such as a color copying machine. In the present invention, a correction factor in a masking equation is previously found for each predetermined hue range. It is judged which of a plurality of predetermined hue ranges corresponds to a hue corresponding to input data composed of color data in a plurality of colors. The input data is subjected to color correction using a masking equation using a correction factor corresponding to the judged hue range.
摘要:
The memory area of an image memory 3 is divided into a plurality of areas (PL0 - PL3) for separetely storing yellow, magenta, cyan and block data constituting a full color image, and the stored color data are read out to form a full color image 3a on a sheet of paper. In forming a mono color image, mono color data are stored in the entire memory area. An image forming apparatus is thus realized which is capable of arbitrarily composing images with a small memory capacity.
摘要:
Disclosed is an apparatus for detecting pixels in a dotted image area (dotted area pixels). Image data corresponding to each of pixels is coded into one of a predetermined number of discrete values. The distance between change points at which the value of the pixel after the coding is changed from a first value to a second value is detected. Further, it is examined whether or not periodicity is recognized in the distance between the change points in the vicinity of a target pixel. If periodicity is recognized in the distance between the change points, it is judged that the target pixel may constitute a dotted image area.
摘要:
An apparatus for and a method of judging a dotted image area using a small-capacity memory. Image data corresponding to one line out of image data representing an original image are stored in a line memory (61). On the line corresponding to the image data stored in the line memory (61), a target pixel is successively set along the main scanning direction. Image data corresponding to the target pixel is compared with image data corresponding to pixels around the target pixel. It is judged whether or not the target pixel is a peculiar point pixel on the basis of the result of the comparison. Further, the distance between peculiar point pixels is operated. The operated distance between the peculiar point pixels is referred to a predetermined judgment basis, to judge whether or not a judging area including the finite number of pixels is a dotted image area.
摘要:
A copying apparatus includes a copying machine unit (9), an operation portion having a central processing unit and an image processing unit (IPU) having a central processing unit. A workstation (WS) is connected to the operation portion through the image processing unit (IPU). Data communication is performed between the workstation (WS) and the image processing unit (IPU) and between the image processing unit (IPU) and the operation portion. The image formation processing performed by the copying machine unit (9) is controlled based on a command generated by operating the workstation (WS).