Abstract: A method and apparatus for imaging are provided. An imaging device photographs a subject and outputs an image signal. Each of a plurality of view finders displays an image based on the image signal.

Abstract: A method and apparatus for imaging are provided. An imaging device photographs a subject and outputs an image signal. Each of a plurality of view finders displays an image based on the image signal.

Abstract: In a digital copying machine according to an image forming apparatus of the invention, when a “thick paper” mode is set through an operation panel, a main CPU sets a gradient of ? for “thick paper” in a ? correction unit of an image processing unit. Thus, a toner attachment amount is controlled and changed from 1.6 mg/cm2 to 1.0 mg/cm2, thereby widening a fixation temperature range for good fixation.

Abstract: An image forming apparatus of the invention includes: an input unit configured to input color image data of multiple colors; a specified color converting unit configured to convert the input color image data of multiple colors to at least two specified colors with a color conversion table; a parameter setting unit configured to create the color conversion table and to set a parameter used for creation to be changeable; and an operation unit configured to change the parameter. According to the image forming apparatus of the invention, in an image forming apparatus capable of printing a color document in two colors, the criteria for converting multiple colors to two colors can be adjusted flexibly as the user desires or prefers.

Abstract: An image forming apparatus includes: a recording unit configured to record plural calibration data, an image forming unit configured to read out the plural calibration data and forming plural calibration patterns as images on a recording medium according to the plural calibration data read out, an ADF reading unit configured to automatically convey and read the recording medium having the plural calibration patterns formed thereon and output image data, an error judging unit configured to compare the image data with reference data prepared in advance to judge whether there is an error in reading of the plural calibration patterns, a calculating unit configured to receive plural image data corresponding to the plural calibration patterns read and compare the plural image data with plural reference image data prepared in advance, respectively, to calculate plural image correction amounts, an image processing unit configured to apply, according to the plural image correction amounts, image correction to image da

Abstract: In a digital copying machine according to an image forming apparatus of the invention, when a “thick paper” mode is set through an operation panel, a main CPU sets a gradient of ? for “thick paper” in a ? correction unit of an image processing unit. Thus, a toner attachment amount is controlled and changed from 1.6 mg/cm2 to 1.0 mg/cm2, thereby widening a fixation temperature range for good fixation.

Abstract: In a digital copying machine according to an image forming apparatus of the invention, when a “thick paper” mode is set through an operation panel, a main CPU sets a gradient of ? for “thick paper” in a ? correction unit of an image processing unit. Thus, a toner attachment amount is controlled and changed from 1.6 mg/cm2 to 1.0 mg/cm2, thereby widening a fixation temperature range for good fixation.

Abstract: A color conversion section converts R-, G- and B-image signals input by the reading of a color image on an original to C-, M- and Y-color signals. A histogram producing means of an image processing section produces density histograms of the respective color signals on the basis of the converted C-, M- and Y-color signals. An original type determination means determines a type of the original on the basis of the histogram data signals. A colored background determination means determines a colored background on the basis of the histogram data signals. A background process presence/absence determination means determines whether a background process is to be executed or not, on the basis of an original type determination result signal and a colored background determination result signal. A CPU produces, when it is determined that the background process is to be executed, a background process table using the density histogram values of the respective color signals.

Abstract: A method and apparatus of printing a document in a twin color copy mode of an image forming apparatus. A first color and a second color are selected in the twin color copy mode of the image forming apparatus. The document to be printed is scanned, and an automatic color selection (ACS) unit determines whether or not the scanned document is a color document or a B/W document. Based on the determination by the ACS unit, the document is printed as either a B/W document using black processing or as a color document using color processing.

Abstract: An image processing apparatus having a read unit which reads an image of a document to output an image signal, an identification unit which performs image area identification of a character area and a background area based on the image signal read by the read unit, a non-character filter unit which performs a non-character filter process to the image signal read by the read unit, the non-character filter unit outputting the image signal to which the non-character filter process is performed, a character filter unit which performs a character filter process to the image signal read by the read unit, the character filter unit outputting the image signal to which the character filter process is performed, a comparison unit which compares the image signal from the read unit and the character-filter-processed image signal from the character filter unit, and a control unit which outputs the non-character-filter-processed image signal from the non-character filter unit when the identification unit determines that th

Abstract: A main CPU re-calculates, when the degree of sharpness has been adjusted, a coefficient in accordance with the value of adjustment. The main CPU finds a maximum bit number from the calculated filter coefficients, effects a bit shift of the filter coefficients in accordance with the size (bit width) of a filter coefficient register, and stores the bit-shifted filter coefficients in the filter coefficients register, thus carrying out a filtering process.

Abstract: An image forming apparatus comprising a recording unit which records a plurality of calibration data, an image forming unit which reads said plurality of calibration data and forms images of a plurality of calibration patterns on a recording medium according to said plurality of calibration data, a reading unit which reads the images of said plurality of calibration patterns to output image data, a computing unit which receives said plurality of image data, and computes a plurality of image correction amounts by comparing the plurality of image data to a plurality of reference image data previously prepared, and an image processing unit which performs image correction to document image data newly read by the reading unit according to said plurality of image correction amounts.

Abstract: An image forming apparatus comprising a control unit which controls a reading unit, a memory unit, a computing unit, an image processing unit, and an image forming unit such that the reading unit reads image information of a document only once, the computing unit receives the image information to compute a density histogram during an interval in which the image information is stored in the memory unit, the memory unit reads the image information to supply the image information to the image processing unit, the image processing unit performs density adjustment to the read image information according to the density histogram and outputs the image information, and the image forming unit forms an image to which the density adjustment has been performed according to the density histogram of the document image by one-time image reading of the reading unit.

Abstract: A main CPU calculates filter coefficient values corresponding to area discrimination signals on the basis of an input sharpness adjustment value and original mode and a base filter coefficient set and a difference filter coefficient set stored in a ROM, and performs a filtering process by selecting a filter coefficient value in accordance with an area discrimination signal of a pixel of interest in input image data.

Abstract: A main CPU reads out CMY values as ? correction patch data from an NVRAM, and outputs a ? correction patch from a color printer section via a ? correction patch output section. The output ? correction patch (sheet) is read by a color scanner section 1 as RGB image data. The RGB image data is converted to CMY color signals by a color conversion section 131 and input to the main CPU via a buffer memory. The main CPU calculates patch read data from the CMY color signals and compares it with the ? correction patch data stored in the NVRAM. The main CPU then calculates an inverse function of a curve of the patch read data and forms ? correction tables of four colors, C, M, Y and K. The ? correction tables are used for full-color ? correction. On the other hand, the main CPU performs an arithmetic operation (error correction) of an error correction table h(x), with an output of black (K) at screen angle ?63° being f(x) and an output of mono-color black (K) at screen angle 90° being g(x).

Abstract: A color conversion section converts R-, G- and B-image signals input by the reading of a color image on an original to C-, M- and Y-color signals. A histogram producing means of an image processing section produces density histograms of the respective color signals on the basis of the converted C-, M- and Y-color signals. An original type determination means determines a type of the original on the basis of the histogram data signals. A colored background determination means determines a colored background on the basis of the histogram data signals. A background process presence/absence determination means determines whether a background process is to be executed or not, on the basis of an original type determination result signal and a colored background determination result signal. A CPU produces, when it is determined that the background process is to be executed, a background process table using the density histogram values of the respective color signals.

Abstract: In a digital copying machine according to an image forming apparatus of the invention, when a “thick paper” mode is set through an operation panel, a main CPU sets a gradient of ? for “thick paper” in a ? correction unit of an image processing unit. Thus, a toner attachment amount is controlled and changed from 1.6 mg/cm2 to 1.0 mg/cm2, thereby widening a fixation temperature range for good fixation.

Abstract: A color conversion section converts R-, G- and B-image signals input by the reading of a color image on an original to C-, M- and Y-color signals. A histogram producing means of an image processing section produces density histograms of the respective color signals on the basis of the converted C-, M- and Y-color signals. An original type determination means determines a type of the original on the basis of the histogram data signals. A colored background determination means determines a colored background on the basis of the histogram data signals. A background process presence/absence determination means determines whether a background process is to be executed or not, on the basis of an original type determination result signal and a colored background determination result signal. A CPU produces, when it is determined that the background process is to be executed, a background process table using the density histogram values of the respective color signals.

Abstract: A main CPU re-calculates, when the degree of sharpness has been adjusted, a coefficient in accordance with the value of adjustment. The main CPU finds a maximum bit number from the calculated filter coefficients, effects a bit shift of the filter coefficients in accordance with the size (bit width) of a filter coefficient register, and stores the bit-shifted filter coefficients in the filter coefficients register, thus carrying out a filtering process.

Abstract: A main CPU calculates filter coefficient values corresponding to area discrimination signals on the basis of an input sharpness adjustment value and original mode and a base filter coefficient set and a difference filter coefficient set stored in a ROM, and performs a filtering process by selecting a filter coefficient value in accordance with an area discrimination signal of a pixel of interest in input image data.