Patent application number | Description | Published |
20080239353 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - A color gamut of image data is appropriately subjected to a smoothing processing to print an image of favorable color reproduction and gradation reproduction. Specifically, when an average lightness is equal to or lower than a blacking lightness, the object pixel is not subjected to the smoothing processing. This can conserve the signal value of the object pixel to prevent a pixel originally having a signal value higher than the blacking lightness from being converted by the gamut compression to a black point. In this manner, a pixel for which the object pixel has the average lightness equal to or lower than the blacking lightness is blacked and a pixel having a signal value higher than the blacking lightness is not compressed to the black point. The resultant image has no deteriorated gradation characteristic when being macroscopically observed. | 10-02-2008 |
20080239355 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - Image data can be subjected to a smoothing processing to improve a color reproduction characteristic and an image free from a deteriorated gradation characteristic can be printed. Specifically, the smoothing processing improves the color reproduction characteristic. This smoothing processing may cause a color originally not having the lightness equal to or lower than blacking lightness to be converted to a color having lightness equal to or lower than the blacking lightness. To solve this, such a color is subjected to a gradation adjustment processing to convert the color to the color having the lightness higher than blacking lightness. A gamut mapping does not map such a color on a black point, thus preventing such a color from being broken by the blacking. | 10-02-2008 |
20080239410 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - A pixel in a photograph region image to be subjected to blacking is subjected to a brightness modulation processing so that the pixel is modulated to any of “a pixel having the brightness to be subject to blacking” and “a pixel having the brightness not to be subject to blacking”. Specifically, the modulation by noise addition converts some pixels for which original pixel values are to be subjected to blacking to a pixel having the brightness not subjected to blacking. Thereby, “a pixel having the brightness not to be subject to blacking” thus converted has no change in brightness in the blacking processing. Consequently, a pixel at which the blacking processing is not generated can be caused to exist in the photograph image. As a result, even when the blacking processing set for character/line region is similarly set for the photograph region, the effect of the blacking can be reduced. | 10-02-2008 |
20090002734 | IMAGE COPYING APPARATUS, CONTROL METHOD THEREFOR, PROGRAM, AND METHOD FOR GENERATING 3D-LUT - There is provided an image copying apparatus provided with a scanner and a printer, the image copying apparatus comprising: an obtaining unit which obtains image data by causing the scanner scan an image of an original; a correction unit which performs correction processing that adds, to saturation, a value corresponding to a difference between lightness before and after performing predetermined editing processing on the image data, with respect to a region where a correction is performed designated near the maximum saturation of a color gamut of the printer; and a control unit which causes the printer to print the image data corrected by the correction unit. | 01-01-2009 |
20090002783 | IMAGE PROCESSING APPARATUS AND PROFILE GENERATING METHOD - Color compression processing capable of sufficiently maintaining a visual constant hue property even after the color compression processing is realized. There is provided a method for generating a profile used to convert a color of a first color reproduction range into a color of a second color reproduction range. The method includes dividing each of the first and second color reproduction ranges into a plurality of regions, performing color space conversion for individual regions in accordance with color space definitions unique to the individual regions, and generating a profile used to convert the color of the first color reproduction range into the color of the second color reproduction range based on color coordinates obtained through the color space conversion performed for individual regions. | 01-01-2009 |
20100157338 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - A plurality of patch sets each including a patch formed by an achromatic ink and a patch formed by chromatic inks are formed by changing a combination ratio in first color conversion processing of executing color conversion of image data in correspondence with a first light source and second color conversion processing of executing color conversion of the image data in correspondence with a second light source. The information of a patch set selected by a user from the plurality of patch sets is acquired. The image data is color-converted by the first color conversion processing and the second color conversion processing corresponding to the combination ratio used to form the patch set selected by the user. | 06-24-2010 |
20100290090 | IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, AND PROGRAM - In order to eliminate image deterioration based on the characteristics of an output device upon execution of edge emphasis processing, an image processing apparatus includes a setting unit which sets a print characteristic on the print medium, a region setting unit which sets a region, a brightness value derivation unit which derives brightness values, a first derivative derivation which derives first derivatives of the brightness values, an edge direction determination unit which determines an edge direction of brightness, an emphasis level determination unit which determines an emphasis level of a pixel value based on the first derivatives, and a replacement unit which calculates second derivatives of brightness values and replaces a pixel value of a pixel of interest based on the sign of the second derivative. | 11-18-2010 |
20100302599 | IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, AND PROGRAM - In order to provide an edge emphasis technique that can eliminate image deterioration of a digital image, an image processing apparatus includes a region setting unit which sets a region including a pixel of interest, a brightness value derivation unit which derives brightness values of the pixels, a first derivative derivation unit which derives first derivatives of the brightness values derived by the brightness value derivation unit, an edge direction determination unit which determines an edge direction of brightness at a position of the pixel of interest based on the results of the first derivatives, a range determination unit which determines a range, and a replacement unit which replaces the pixel value of the pixel of interest. | 12-02-2010 |
20110135201 | IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, AND IMAGE PROCESSING PROGRAM - There is provided an image processing apparatus for applying an adjusting process to an image including multicolor image signals. An image area including a pixel to be processed is extracted, and one representative signal value is generated from signal values corresponding to a plurality of colors of pixels included in the image area (S | 06-09-2011 |
20110267655 | IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, IMAGE PROCESSING PROGRAM, AND STORAGE MEDIUM - An image processing apparatus to perform an edge intensifying processing of an image includes an obtaining unit, a calculating unit, a setting unit, and a processing unit. The obtaining unit obtains image data composed of pixels aligned in a main scanning direction and a sub-scanning direction perpendicular to the main scanning direction. The calculating unit obtains an edge direction of an image and a variation amount indicating a magnitude of change in a luminance value. The setting unit sets an intensity of the edge intensifying processing. The processing unit performs the edge intensifying processing. In a case where the image data resolution in the sub-scanning direction is higher than in the main scanning direction, the setting unit sets the intensity of the edge intensifying processing to an amount that is higher when the edge direction is the sub-scanning direction than when the edge direction is the main scanning direction. | 11-03-2011 |
20120147432 | IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, IMAGE PROCESSING PROGRAM, AND STORAGE MEDIUM - An image processing apparatus includes an obtaining unit, a determination unit, a setting unit, and a processing unit to perform an image edge intensifying processing. The obtaining unit obtains image data by reading a document. The determination unit determines an image edge direction. The setting unit sets an edge intensifying processing intensity based on the image data and a processing intensity determined corresponding to a difference between resolution in a main scanning direction and resolution in a sub-scanning direction. The processing unit performs the image edge intensifying processing according to the set intensity. In response to the resolution of the image data being higher in the sub-scanning direction than in the main scanning direction, the setting unit sets a higher intensity of the edge intensifying processing in response to the edge direction being along the sub-scanning direction than in response to the edge direction being along the main scanning direction. | 06-14-2012 |
20120268759 | IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, AND PROGRAM - In order to eliminate image deterioration based on the characteristics of an output device upon execution of edge emphasis processing, an image processing apparatus includes a setting unit which sets a print characteristic on the print medium, a region setting unit which sets a region, a brightness value derivation unit which derives brightness values, a first derivative derivation which derives first derivatives of the brightness values, an edge direction determination unit which determines an edge direction of brightness, an emphasis level determination unit which determines an emphasis level of a pixel value based on the first derivatives, and a replacement unit which calculates second derivatives of brightness values and replaces a pixel value of a pixel of interest based on the sign of the second derivative. | 10-25-2012 |