Abstract: The present invention directs to an inspection apparatus, comprising: an obtaining unit that obtains a correct image for comparison against an inspection target image read from a print sheet; a first extraction unit that extracts a first coordinate group indicating an outside edge of the correct image from a feature point of the correct image; and a second extraction unit that extracts a second coordinate group indicating an inspection region inside the correct image that does not include the extracted first coordinate group of the correct image.

Abstract: The present invention directs to an inspection apparatus, comprising: an obtaining unit that obtains a correct image for comparison against an inspection target image read from a print sheet; a first extraction unit that extracts a first coordinate group indicating an outside edge of the correct image from a feature point of the correct image; and a second extraction unit that extracts a second coordinate group indicating an inspection region inside the correct image that does not include the extracted first coordinate group of the correct image.

Abstract: A color of an image that is printed based on a second color value obtained by converting a color value of a specific color falling outside a color gamut without using a first conversion table is closer to the specific color falling outside the color gamut than a color of an image that is printed based on a first color value obtained by converting the color value of the specific color falling outside the color gamut by using the first conversion table.

Abstract: An image processing apparatus comprises: a memory device that stores a set of instructions; and at least one processor that executes the set of instructions to: obtain an image; segment the obtained image into regions; and integrate a specular reflected light region and an adjacent region adjacent to the specular reflected light region among the segmented regions into an integrated region; and determine glossiness of each of the regions including the integrated region.

Abstract: An image processing apparatus includes a first extraction unit configured to extract an object included in image data, a second extraction unit configured to extract a highlight region of the object extracted by the first extraction unit, a generation unit configured to generate a lightness histogram of pixels in a region including the highlight region extracted by the second extraction unit and a region around the highlight region in the object, and a decreasing unit configured to decrease the lightness of the pixels, except for the highlight region, based on the lightness histogram generated by the generation unit. The first extraction unit, the second extraction unit, the generation unit, and the decreasing unit are implemented by at least one of a processor and a circuit.

Abstract: An image processing apparatus and a method controlling the same extract an object included in image data and extract a highlight region of the object. A region including the highlight region and the pixels around the highlight region are obtained in the object. The lightness histogram of the pixels included in the region is generated, and the lightness of the pixels except the highlight region is adjusted based on the generated histogram.

Abstract: An image processing apparatus configured to execute variable magnification processing on an image includes a position determination unit configured to serially determine pixel insertion or removal positions in the image in a direction perpendicular to a direction of the variable magnification processing, and an insertion or removal processing unit configured to execute insertion or removal processing on pixels existing at the insertion or removal positions determined by the position determination unit. The position determination unit is configured to determine, within a range defined by a position distant from an immediately previously determined insertion or removal position by a first distance in the variable magnification processing direction and a position distant therefrom by a second distance in the variable magnification processing direction, a next insertion or removal position while referring to the immediately previously determined insertion or removal position.

Abstract: An image processing apparatus includes an obtaining unit configured to obtain a gamma correction table used for image formation on non-reference paper using a correlation between a characteristic of reference paper and a characteristic of the non-reference paper and a gamma correction table obtained through calibration using the reference paper, a first reading unit configured to form a pattern on plain paper and read the formed pattern, a second reading unit configured to form a pattern on an image bearing member and read the formed pattern, a comparison unit configured to compare a value read by the first reading unit with a value ready by the second reading unit, and a correction unit configured to correct the characteristic indicating the correlation used for obtaining the gamma correction table for the non-reference paper by the obtaining unit when a difference of values compared by the comparison unit exceeds a first threshold.

Abstract: An image processing apparatus comprises a scanning unit that obtains an image by scanning a document, an analyzing unit that analyzes plural portions included in the obtained image, and a displaying unit that displays plural pieces of readability information corresponding respectively to the plural portions, each piece of readability information indicating a readability of one of the plural portions, together with the obtained image on the basis of the analysis by the analyzing unit, wherein the readability is a readability of characters.

Abstract: This invention has as its object to generate image data having a desired resolution by a small footprint upon execution of resolution conversion processing in an image processing apparatus having an area image sensor. This invention is an image processing method for processing a plurality of image data which have phase shifts in the main scanning direction and sub scanning direction, including a step of inputting a target resolution, a step of executing super-resolution processing for respective positions using image data, corresponding to each position of the document in the sub scanning direction, of the plurality of image data, and a step of further executing variable-magnification processing of the image data which has undergone the super-resolution processing at that position when the resolution of the image data executed super-resolution processing is lower than the target resolution.

Abstract: An apparatus is capable of processing luminance data and color-difference data of color image data. The apparatus includes a generation unit configured to generate digital watermark image data based on the color-difference data of the color image data, and an output unit configured to output the luminance data and the digital watermark image data generated by the generation unit. Color image data can be generated based on the digital watermark image data and the luminance data output from the output unit.

Abstract: A color printed image with compressed colors produced by printing an electronic color image is reconstructed into an electronic color image similar to an original color image by using digital watermark image data with a reduced data size. The digital watermark image data is produced using color difference data of the color image data including luminance data and the color difference data. The digital watermark image data either does not include luminance data or includes luminance data with a data size reduced at a very large ratio.

Abstract: An image processing apparatus configured to execute variable magnification processing on an image includes a position determination unit configured to serially determine pixel insertion or removal positions in the image in a direction perpendicular to a direction of the variable magnification processing, and an insertion or removal processing unit configured to execute insertion or removal processing on pixels existing at the insertion or removal positions determined by the position determination unit. The position determination unit is configured to determine, within a range defined by a position distant from an immediately previously determined insertion or removal position by a first distance in the variable magnification processing direction and a position distant therefrom by a second distance in the variable magnification processing direction, a next insertion or removal position while referring to the immediately previously determined insertion or removal position.

Abstract: In a recording apparatus in which resolution of a main scan and resolution of a subscan differ, a print character is preferably reproduced. An image processing apparatus for controlling the recording apparatus in which the subscan resolution is lower than the main scan resolution has: a character direction discriminating unit for discriminating a direction of a character included in image data; an image rotating unit for rotating the image data so that a horizontal line in the character decided by the character direction discriminating unit is scanned by the main scan of the recording apparatus; and a control unit for allowing the recording apparatus to record the image data rotated by the image rotating unit.

Abstract: An image processing apparatus includes a first shading correction unit configured to perform shading correction for first image data by using a correction coefficient that is set for yielding an area corresponding to the luminance of a corrected trace, and a corrected trace detecting unit configured to perform first image processing for second image data resulting from correction of the first image data by the first shading correction unit to detect the corrected trace.

Abstract: This invention has as its object to generate image data having a desired resolution by a small footprint upon execution of resolution conversion processing in an image processing apparatus having an area image sensor. This invention is an image processing method for processing a plurality of image data which have phase shifts in the main scanning direction and sub scanning direction, including a step of inputting a target resolution, a step of executing super-resolution processing for respective positions using image data, corresponding to each position of the document in the sub scanning direction, of the plurality of image data, and a step of further executing variable-magnification processing of the image data which has undergone the super-resolution processing at that position when the resolution of the image data executed super-resolution processing is lower than the target resolution.

Abstract: A color printed image with compressed colors produced by printing an electronic color image is reconstructed into an electronic color image similar to an original color image by using digital watermark image data with a reduced data size. The digital watermark image data is produced using color difference data of the color image data including luminance data and the color difference data. The digital watermark image data either does not include luminance data or includes luminance data with a data size reduced at a very large ratio.

Abstract: An apparatus is capable of processing luminance data and color-difference data of color image data. The apparatus includes a generation unit configured to generate digital watermark image data based on the color-difference data of the color image data, and an output unit configured to output the luminance data and the digital watermark image data generated by the generation unit. Color image data can be generated based on the digital watermark image data and the luminance data output from the output unit.

Abstract: An image processing apparatus includes a first shading correction unit configured to perform shading correction for first image data by using a correction coefficient that is set for yielding an area corresponding to the luminance of a corrected trace, and a corrected trace detecting unit configured to perform first image processing for second image data resulting from correction of the first image data by the first shading correction unit to detect the corrected trace.

Abstract: An image processing apparatus for correction on mounting shifts among sensor chips in a contact image sensor. The apparatus has plural sensor chips each having plural pixels, arrayed in a main scanning direction, and a correction device which performs correction on a shift in the main scanning direction and/or a subscanning direction between adjacent sensor chips in a signal outputted from the plural sensor chips. The correction device performs different processing in a first sensor chip interval and a second sensor chip interval.