Abstract: An image forming apparatus according to an embodiment of the invention reads an original by mechanically moving an axial light source in a subscanning direction perpendicular to the axis. The image forming apparatus includes: a sensor whose resolution in a main scanning direction parallel to the axis of the axial light source is higher than a designated resolution; a controller that controls the driving speed of the axial light source so that the resolution in the subscanning direction is higher than the designated resolution; an original-image-data generating unit that generates original image data with a resolution higher than the designated resolution in response to the output from the sensor; and an image reducing unit that generates reduced pixels fewer than a specified number of pixels in the original image data to generate a reduced image with a resolution equal to the designated resolution.

Abstract: An image forming apparatus applies a shading correction to an image read from a white reference board 18, and determines presence or absence of stripe-like noise in the image read therefrom after applying the shading correction. The apparatus exposes an area at which there is no noise in the white reference board 18 to create a white reference value for a shading correction for reading a document after that time.

Abstract: An image forming apparatus according to an embodiment of the invention reads an original by mechanically moving an axial light source in a subscanning direction perpendicular to the axis. The image forming apparatus includes: a sensor whose resolution in a main scanning direction parallel to the axis of the axial light source is higher than a designated resolution; a controller that controls the driving speed of the axial light source so that the resolution in the subscanning direction is higher than the designated resolution; an original-image-data generating unit that generates original image data with a resolution higher than the designated resolution in response to the output from the sensor; and an image reducing unit that generates reduced pixels fewer than a specified number of pixels in the original image data to generate a reduced image with a resolution equal to the designated resolution.

Abstract: An image forming apparatus according to an embodiment of the invention reads an original by mechanically moving an axial light source in a subscanning direction perpendicular to the axis. The image forming apparatus includes: a sensor whose resolution in a main scanning direction parallel to the axis of the axial light source is higher than a designated resolution; a controller that controls the driving speed of the axial light source so that the resolution in the subscanning direction is higher than the designated resolution; an original-image-data generating unit that generates original image data with a resolution higher than the designated resolution in response to the output from the sensor; and an image reducing unit that generates reduced pixels fewer than a specified number of pixels in the original image data to generate a reduced image with a resolution equal to the designated resolution.

Abstract: A method and apparatus of forming an image includes reading an original with a first resolution. An original is read with a second resolution which is different from said first resolution. The image information read with the first resolution and the second resolution is converted into image information of a third resolution for image forming. An image is formed with the third resolution based on the image information converted by the conversion.

Abstract: In an image reading apparatus for reading a color document as a monochrome image, an image forming apparatus of the invention includes a composite light source that irradiates the color document and includes plural light sources different in spectral distribution, a sensor to detect the intensity of a reflected light from the color document, a light emission ratio setting unit to changeably set light emission ratios different for the respective light sources, and a light source control unit to control effective light amounts of the plural light sources with the set light emission ratios. According to the image forming apparatus of the invention, when the color document is monochromatically read, the reading is performed with the brightness close to the human visual sensitivity, the user can changeably set color sensitivity, and uneven density can be reduced.

Abstract: An image forming apparatus according to an embodiment of the invention includes: a scanner that reads an original document; an image processor that processes a high-lightness region of the original document, the region is lighter than the base of the original document, so as to be viewed; and an output unit that outputs the data of the original document subjected to image processing.

Abstract: An image forming apparatus applies a shading correction to an image read from a white reference board 18, and determines presence or absence of stripe-like noise in the image read therefrom after applying the shading correction. The apparatus exposes an area at which there is no noise in the white reference board 18 to create a white reference value for a shading correction for reading a document after that time.

Abstract: In an image reading apparatus for reading a color document as a monochrome image, an image forming apparatus of the invention includes a composite light source that irradiates the color document and includes plural light sources different in spectral distribution, a sensor to detect the intensity of a reflected light from the color document, a light emission ratio setting unit to changeably set light emission ratios different for the respective light sources, and a light source control unit to control effective light amounts of the plural light sources with the set light emission ratios. According to the image forming apparatus of the invention, when the color document is monochromatically read, the reading is performed with the brightness close to the human visual sensitivity, the user can changeably set color sensitivity, and uneven density can be reduced.

Abstract: An image forming apparatus according to an embodiment of the invention includes: a scanner that reads an original document; an image processor that processes a high-lightness region of the original document, the region is lighter than the base of the original document, so as to be viewed; and an output unit that outputs the data of the original document subjected to image processing.

Abstract: An image forming apparatus according to an embodiment of the invention reads an original by mechanically moving an axial light source in a subscanning direction perpendicular to the axis. The image forming apparatus includes: a sensor whose resolution in a main scanning direction parallel to the axis of the axial light source is higher than a designated resolution; a controller that controls the driving speed of the axial light source so that the resolution in the subscanning direction is higher than the designated resolution; an original-image-data generating unit that generates original image data with a resolution higher than the designated resolution in response to the output from the sensor; and an image reducing unit that generates reduced pixels fewer than a specified number of pixels in the original image data to generate a reduced image with a resolution equal to the designated resolution.

Abstract: An image processing apparatus comprising a region recognition section for reading out the given image information and simultaneously creating the region recognition signal, a memory element for storing the image information in the page memory together with the created region recognition signal, a region recognition modifying processing section for reading out and modifying the region recognition signal, and a modifying section for reading out the image information and modifying the image information in compliance with the region recognition signal modified.

Abstract: An image processing apparatus comprising a region recognition section for reading out the given image information and simultaneously creating the region recognition signal, a memory element for storing the image information in the page memory together with the created region recognition signal, a region recognition modifying processing section for reading out and modifying the region recognition signal, and a modifying section for reading out the image information and modifying the image information in compliance with the region recognition signal modified.

Abstract: In an image processing device, image data is buffered by an image buffer section to output an interested pixel value and surrounding pixel values of a pixel surrounding an interested pixel. A shift condition determination section determines on the basis of the interested pixel value and the surrounding pixel values whether or not the interested pixel value should be shifted, and outputs a shift determination result. A pixel shifting amount computing section computes the pixel shifting amount of the interested pixel, and the shifted pixel position calculation section outputs a shift pixel position signal on the basis of setting parameters Tx and Ty, and clock signals XCLOCK and YCLOCK. A pixel value shifting section outputs the interested pixel value after the shifting on the basis of the interested pixel value, a shift determination result, the pixel shifting amount, and the shift pixel position signal.

Abstract: A coding and/or decoding system for an image including bit-sops of different levels, is provided in an image recoding system which recodes bit-map data including small-level bit-map data and multilevel bit-map data in an image memory and which read the bit-map data out of the image memory to recode an image. In this coding and/or decoding system, after small-level bit-map data and multilevel bit-map data are divided into blocks, each of which is composed of a plurality of picture elements, the divided small-level bit-map data and the divided multilevel bit-map data are inputted to small-level bit-map data coding section and multilevel bit-map data coding section, respectively. The small-level bit-map data are transformed into codes representative of the number of black or white and half-tone picture elements in the block, and the multilevel bit-map data are transformed into codes representative of the average value or the total in the block.

Abstract: An image recording system for deriving a recorded image from an image signal by producing a positional-deviation amount indicative signal representative of a positional deviation in a sub-scanning direction of a scanning line forming a recorded image. The system corrects the positional deviation of the scanning line on the basis of the positional-deviation amount indicative signal. The system also corrects a density deviation of a recorded image due to the correction of the positional deviation on the basis of a pixel pattern of the image signal. A method is also provided for detecting a relative positional deviation between images of different colors in a color image recording system.

Abstract: An image recording system superimposes, on an original image, an additional image which is same as at least any one of visible characters, symbols and numerals recorded on a recorded product and records the superimposed image on the recorded product as an image for certification. The additional image superimpose-recorded on the recorded product cannot visually be recognized and it is permitted to be visible when a universal optical filter is used.

Abstract: An ink amount correction system is provided in a color image printer system for printing a full color image by mixing yellow, magenta, cyanogen and India ink amount signals. The ink amount correction system includes: a plurality of color ink amount correction circuits which include a quantization section for quantizing a color ink amount indicative signal representative of the amount of an ink of a predetermined color corresponding to each of picture elements of a primary color image; an error calculating section for calculating a quantization error between the input and output of the quantization section, to output as a quantization error signal; and a feedback correction section for adding the quantization error signal derived by the error calculating section, to the corresponding color ink amount indicative signal of the surrounding picture element, for correcting the ink amount indicative signal.

Abstract: An image recording apparatus according to the present invention is characterized by comprising first signal conversion section for converting a pixel density value of an current pixel of an input image signal into a first recording control signal for defining a recording amount, second signal conversion section for referring to an adjacent-pixel recording control signal for defining a recording amount of at least one adjacent pixel connected to the current pixel to convert the first recording control signal into a second recording control signal, being closest to the first recording control signal, for defining a recording amount at which pixel formation for the current pixel is stabilized, recording section for recording an image based on the second recording control signal, and error diffusion section for diffusing an error between the pixel density value and a recording density value of the second recording control signal to a pixel density value of each of non-processed pixels located around the current p

Abstract: In the apparatus for processing a color image, a data signal representing another information differs from the color image is generated by a generating means. The another information is embedded into the color image by varying one of a color difference and a chroma of the color image in accordance with the data signal by an image processing means.