Patent application number | Description | Published |
20090074289 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - An image processing apparatus comprises: an edge extraction section for extracting an edge of an object of a character or a line drawing included in an image; a judgment section for judging, based on the image, a possibility that the object is an image including a plurality of colors and the object is a black object having a pixel value of an image of each color being not less than a certain value; and an edge processing section for adjusting the pixel value of the extracted edge of the object according to a result obtained by the judging by the judgment section. | 03-19-2009 |
20110019209 | THRESHOLD MATRIX GENERATING DEVICE AND THRESHOLD MATRIX GENERATING METHOD - Disclosed is a threshold matrix generating device including a basic dot pattern generating unit for obtaining a basic dot pattern by carrying out a filter process by a convolution filter to an initial dot pattern in which dots are arbitrarily arranged, by obtaining a dot density of the dots included in the initial dot pattern and by repeating a process of moving dots to a pixel in which the dot density is smallest from a pixel in which the dot density is greatest and a threshold setting unit for generating a threshold matrix of a FM screen by increasing or decreasing dots from the basic dot pattern and by repeating a process of setting a threshold to a pixel in which the dots are increased or decreased, and the threshold matrix has a shape which is to be arranged in an oblique direction by having an angle. | 01-27-2011 |
20110216381 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - Disclosed is an image forming apparatus including a color converter for converting cyan, magenta and yellow components of a first image signal to equivalent neutral density, calculating a first gray component from cyan, magenta and yellow components of equivalent neutral density, subtracting the first gray component from each of the cyan, magenta and yellow components of equivalent neutral density, subjecting each of the cyan, magenta and yellow components of equivalent neutral density from which the first gray component is subtracted to an inverse conversion of the equivalent neutral density conversion, and outputting a second image signal comprising cyan, magenta and yellow components which are obtained by carrying out the inverse conversion to the cyan, magenta and yellow components of equivalent neutral density from which the first gray component is subtracted, the first black component and the first gray component; an image forming section for forming an image on a paper based on the second image signal by using cyan, magenta, yellow, black and gray toners; and a controller for controlling the color converter and the image forming section. | 09-08-2011 |
20120099802 | IMAGE PROCESSING METHOD AND IMAGE PROCESSING APPARATUS - Disclosed is an image processing method for processing image data having pixels consecutively arranged in two directions orthogonal to each other including setting a first pixel area configured by a first and a second predetermined numbers of pixels, summing up the individual pixel values of the first predetermined number of pixels in a column-wise manner with respect to first pixel columns arranged in one direction summing up the individual pixel values of the second predetermined number of pixels in a column-wise manner with respect to second pixel columns arranged in the other direction, identifying a count of stairs given by differences among the pixel values of the individual pixels in the first pixel area, respectively for one direction and for the other direction, and determining a pixel value of a predetermined pixel contained in the first pixel area. | 04-26-2012 |
20120163730 | IMAGE PROCESSING APPARATUS WHICH PERFORMS ANTI-ALIASING ON INPUT IMAGE DATA AND IMAGE PROCESSING METHOD THEREOF - Disclosed in an image processing apparatus for performing anti-aliasing on input image data including a viewing window setting section which sets a viewing window of a predetermined size which includes a focused pixel, a difference determination section which extracts a plurality of combinations of two predetermined adjacent pixels in the viewing window and determines a difference between input pixel values of the two extracted pixels for each combination, a determination information obtaining section which obtains combination determination information based on a combination of determination results, and a pixel value calculation section which obtains an output pixel value of the focused pixel by carrying out a weighted addition of an input pixel value of the focused pixel and an input pixel value of a predetermined neighboring pixel which is adjacent to the focused pixel based on the combination determination information. | 06-28-2012 |
20130004098 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - An image processing apparatus includes a thinning processing unit which performs thinning processing on image data and a smoothing processing unit which performs smoothing processing on the image data. The image processing apparatus further includes an edge direction determination unit which determines an edge direction with respect to each pixel of the image data, a blending processing unit which decides a pixel value of a target pixel of when the smoothing processing and the thinning processing are realized at the same time, and a thinning adjustment unit which determines whether a thinned pixel becomes isolated, and the thinning adjustment unit resets the change amount in pixel value due to the thinning processing of the thinned pixel to a value of zero, if the thinned pixel is determined to be isolated. | 01-03-2013 |
20130004099 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - An image processing apparatus includes a smoothing processing unit which performs smoothing processing, a thinning processing unit which performs thinning processing, an edge direction determination unit which determines an edge direction with respect to each pixel of the image data and a blending processing unit which decides a pixel value of each pixel of when the thinning processing and the smoothing processing are realized at same time. In the image processing apparatus, the blending processing unit decides a pixel value of a target pixel of when the thinning processing and the smoothing processing are realized at the same time depending on a combination of whether the thinning processing is performed or not and whether the smoothing processing is performed or not on the target pixel. | 01-03-2013 |
20130216137 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - An image processing apparatus includes a first edge extraction unit, an edge processing unit, a second edge extraction unit, a third edge extraction unit and a gradation processing unit. The gradation processing unit performs gradation processing on image data on which edge processing has been performed by the edge processing unit, and switches contents of the gradation processing on the basis of whether a pixel of the image data is a third edge pixel or a no-third edge pixel to enhance a third edge region as compared with another region. The third edge extracted by the third edge extraction unit is constituted of a first edge extracted by the first edge extraction unit as an edge pixel of an object and a second edge extracted by the second edge extraction unit as a pixel having a pixel value changed by the edge processing. | 08-22-2013 |