Class / Patent application number | Description | Number of patent applications / Date published |
358461000 | Shade correction | 47 |
20080204820 | IMAGE READING APPARATUS AND SHADING CORRECTION DATA GENERATING METHOD - An image reading apparatus capable of generating accurate shading correction data while removing noise. A shading reference plate is arranged at a location having different optical distance between the location and an image sensor in an image reading unit from optical distance between original reading position and said image sensor. The shading reference plate is read by the image reading unit whereby secondary reference data is acquired, and a reference sheet is read which is put on a position substantially identical to the original reading position whereby primary reference data is acquired. Primary and secondary correction data is generated based on the primary and secondary reference data, and correction coefficient data is generated based on the primary and secondary correction data. Shading correction data is generated based on read data of the shading reference plate and the correction coefficient data. The shading correction of the images of original read by the image reading unit is performed based on the shading correction data. | 08-28-2008 |
20080218811 | KEYSTONE CORRECTING METHOD AND DISPLAY APPARATUS - Disclosed are a keystone correction method and a display apparatus using the same. The keystone correction method can include receiving a plurality of pixel data included in an image signal of a frame; computing a coordinate and data of a correction pixel from 3 row-directionally successive pixel data of the received pixel data; repeating the step of computing the coordinate and data of the correction pixel from all pixels of a row in the frame; and repeating the step of repeating the step of computing the coordinate and data of the correction pixel for all rows in the frame. With the present invention, the keystone can be corrected by using a minimum resource. | 09-11-2008 |
20080278771 | IMAGE READING APPARATUS - Disclosed in an image reading apparatus including a reading unit to obtain an image data by irradiating a document with a light and reading an image of the document, a paper thickness detection unit to detect a thickness of the document to be read by the reading unit, a process unit to process the image data which is obtained by the reading unit based on a parameter and a control unit to carry out a control of changing the parameter of the process unit according to the thickness of the document which is detected by the paper thickness detection unit. | 11-13-2008 |
20080291505 | METHOD, APPARATUS FOR CORRECTING IMAGE SIGNAL FROM IMAGE SENSOR, AND IMAGING SYSTEM WITH APPARATUS - A method of correcting an image signal generated by a charge coupled device (CCD) image sensor in an imaging system is provided. The imaging system stores a number of gamma correction curves, each of which includes a respective correction factor for increasing contrast in a dark portion of the image signal. The method includes: measuring gray scale value of each pixel of the CCD image sensor; estimating a contrast level of an object scene to be imaged using the measured gray scale values; and correcting the image signal using a corresponding gamma correction curve depending on the estimated contrast level of the object scene. | 11-27-2008 |
20090015879 | IMAGE PICKUP DEVICE, SIGNAL PROCESSING DEVICE AND SIGNAL PROCESSING METHOD - An imaging device for reducing fixed pattern noise caused by dark current or the like. The imaging device ( | 01-15-2009 |
20090067009 | IMAGE READING APPARATUS AND IMAGE PROCESS METHOD - Disclosed is an image reading apparatus which reads images in a front side and a back side of a document by passing the document through the image reading apparatus once including a first reading section to read the front side of the document, a second reading section to read the back side of the document and an image process section to calculate a first standard value for carrying out a first shading correction to the first reading section and a second standard value for carrying out a second shading correction to the second reading section, respectively, and to carry out the first shading correction to a first image data read by the first reading section based on the calculated first standard value and to carry out the second shading correction to a second image data read by the second reading section based on the calculated second standard value. | 03-12-2009 |
20090073504 | IMAGE FORMING APPARATUS AND CONTROL METHOD THEREOF - An image forming apparatus and a control method thereof are disclosed. The disclosed image forming apparatus includes a white reference sheet provided at one side of a flat bed, for scanning an object, an image sensor module including an image sensor to detect light reflected from the white reference sheet in a scanning operation for the white reference sheet and light reflected from an image on the object in a scanning operation for the object, and to output analog image signals respectively corresponding to the reflected lights, an analog front end (AFE) to convert each analog image signal output from the image sensor to a digital image signal, a shading memory to store shading data obtained in the scanning operation for the white reference sheet, and a controller to calculate differences among outputs from R, G, and B channels of the image sensor, using the stored shading data, to correct the stored shading data, based on the calculated output differences, and to correct image data outputs generated from the R, G, and B channels in the scanning operation for the object, based on the calculated output differences. The image forming apparatus can correct different physical offset values possibly present at different color channels in a color scanning operation. Accordingly, it is possible to adjust the color balance of a scanned image, and thus to achieve an enhancement in the color quality of the image. | 03-19-2009 |
20090086279 | IMAGE READING APPARATUS, IMAGE READING METHOD AND IMAGE READING PROGRAM - An image reading apparatus in which cross-talk noise occurring between plural reading units is reduced, an image reading method and an image reading program are provided. There are included plural reading units that respectively operates at different timings, a reference data generation unit that acquires first read data as a result of reading of a first read object, acquires an operation state of the plural reading units during the reading of the first reading object, generates reference data based on the first read data, associates the operation state with the reference data obtained in the operation state and stores them, and a correction unit that acquires second read data as a result of reading of a second read object, acquires an operation state of the plural reading units during the reading of the second reading object, acquires the reference data corresponding to the operation state, and corrects the second read data based on the reference data. | 04-02-2009 |
20090161171 | Image Processing Apparatus - An image processing apparatus is provided that includes a scanning unit for scanning a document to obtain scanning data and a control unit. The control unit is configured to specify a shadow region to be modified in the scanning data, execute a first adjusting operation for selecting a gray-scale level of a portion of the scanning data corresponding to the specified shadow region, and modify the scanning data according to the selected gray-scale level. | 06-25-2009 |
20090185237 | IMAGE READING APPARATUS AND IMAGE FORMING APPARATUS - An image reading apparatus including: an image sensor unit having a light source that irradiates light onto an original document transferred to a predetermined image reading position, and a light receiving element that receives reflected light of the light; a white reference member for shading correction, provided so as to oppose the image sensor unit across a transferring path for the original document; an actuator that adjusts a position or an angle of the white reference member; and a control device that sets a position or angle of the white reference member and controls the actuator so as to adjust the white reference member to the set position or to the set angle, so that light reflected from the white reference member is received on the light receiving element when correcting shading, and so that the reflected light is not received on the light receiving element when reading an image. | 07-23-2009 |
20090195840 | METHOD OF SHADING CORRECTION IN IMAGE READER AND IMAGE PROCESSING APPARATUS - The invention includes a brightness reading position control section for reading reference data of a reference plate a plurality of times for different locations by an image reader, a reading data storage section for storing the plurality of brightness reading data on the basis of each charge coupled device element, and a correction value computing section for performing computations on the plurality of brightness reading data in order to compute correction reference data for performing shading correction of an image data derived from an original. The invention makes it possible to prevent variations in the correction reference data that occur due to dust sticking onto or scratches formed in the reference plate. | 08-06-2009 |
20090237745 | IMAGE READING APPARATUS, IMAGE FORMING APPARATUS, IMAGE READING METHOD, AND IMAGE FORMING METHOD - During a sheet-through operation, for a first original, a shading operation is performed to acquire white data and a light-quantity measuring operation is performed to acquire a reference value. For subsequent originals, only the light-quantity measuring operation is performed to acquire a subsequent light quantity. If the reference value and the subsequent light quantity differ greatly, the shading operation is performed at this time point to acquire new white data. The sheet-through operation is not stopped when the shading operation is not performed and the sheet-through operation is stopped when the shading operation is performed. | 09-24-2009 |
20100073734 | SCANNER, IMAGE CORRECTING METHOD THEREIN, AND IMAGE FORMING APPARATUS HAVING THE SAME - A scanner including: a transparent plate; a light emitting unit that emits light to an object on the transparent plate; a sensor to form an image of the object; a focusing lens unit that is arranged on a light path between the transparent plate and the sensor, to focus light from the object onto the sensor; and a controller to determine whether a foreign substance is disposed in the light path, using the image, calculates a position of the foreign substance, and corrects the image on the basis of the calculated position of the foreign substance. | 03-25-2010 |
20100091339 | IMAGE SCANNING APPARATUS AND SHADING CORRECTING METHOD THEREOF - An image scanning apparatus includes a first scanning unit to scan a first side of a conveyed document and detect a white area, a direction change unit to re-convey the conveyed document to a duplex scan path, a second scanning unit to scan the white area of the re-conveyed document, and a controller to perform a shading correction of the second scanning unit using scan data for the white area. | 04-15-2010 |
20100103474 | IMAGE READING METHOD, IMAGE READING APPARATUS, AND PROGRAM RECORDING MEDIUM - A method for image processing in which an image of a bound document such as a book placed face-down on a document positioning plate is read and processed is provided. The method includes reading the bound document through the document positioning plate, displaying the read image, the read image having at least one of a shadow portion of a bound portion and a shadow portion of an edge portion, inputting information about a direction attribute of a rectangular area of the shadow portion in the displayed image, determining the direction attribute based on the input information, and correcting a density of the rectangular area based on the determined direction attribute. | 04-29-2010 |
20100177360 | SHADING CORRECTION APPARATUS IN IMAGE SCANNING APPARATUS - A shading correction apparatus includes: a light irradiating unit configured to scan an original document; a reference plate located in a scanning area of the light irradiating unit; a detecting unit configured to receive reflected light from the original document or the reference plate of light irradiated by the light irradiating unit; a first control unit configured to classify plural areas of the reference plate, which are divided in a direction perpendicular to a traveling direction of the light irradiating unit, as plural blocks, scan the reference plate for each of the blocks with the light irradiating unit, and detect valid areas of the plural blocks; and a second control unit configured to set the valid areas of the plural blocks as adopted areas used for shading correction. | 07-15-2010 |
20100182652 | IMAGE READING APPARATUS, BLACK CORRECTION EXECUTING METHOD, AND A COMPUTER-READABLE MEDIUM STORING BLACK CORRECTION EXECUTING PROGRAM - The present invention provides an image reading apparatus that includes: a photoelectric sensor including plural reading pixels aligned in one direction and output an electric signal depending on the amount of light from an image on the document; a read control section that reads a document image with the photoelectric sensor in accordance with a read instruction, and obtains image data; a black correction section that performs a black correction to adjust an output under dark condition of each reading pixel to a value within a predetermined range, the output under dark condition being an electric signal output when the amount of light input is zero; and a black correction execution determining section that determines whether to perform the black correction, when the read interval between each two document sheets of the multi-page document is equal to or shorter than a predetermined period of time. | 07-22-2010 |
20100214626 | EXPOSURE DEVICE, IMAGE FORMING APPARATUS, EXPOSURE CONTROL METHOD AND COMPUTER-READABLE MEDIUM - An exposure device includes a plurality of light-emitting elements, a lighting driver, a first storage, a reader, a shading correction unit and a second storage. The lighting driver drives and lights up the light-emitting elements based on image data. The first storage stores light amount unevenness correction values of the respective light-emitting elements. The reader reads the light amount unevenness correction values stored in the first storage. The shading correction unit executes shading correction for the light amount unevenness correction values read by the reader. The second storage stores correction values obtained by having the shading correction unit to execute the shading correction for the light amount unevenness correction values. The lighting driver controls light power of the respective light-emitting elements based on the correction values stored in the second storage. | 08-26-2010 |
20100245936 | IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, AND PROGRAM - An image processing apparatus that performs shading correction processing with the use of white reference data is provided. The image processing apparatus includes a source data acquisition unit and a white reference data generation unit. The source data acquisition unit acquires source data for the white reference data. The white reference data generation unit generates the white reference data expressed with a predetermined number of bits from the source data acquired by the source data acquisition unit. The white reference data generation unit determines bit precision depending on the minimum value of the source data and generates the white reference data having the determined bit precision. | 09-30-2010 |
20100290093 | IMAGE READING DEVICE AND IMAGE FORMING APPARATUS - The image reading device includes: a reading unit that includes a light source emitting light to irradiate an image on a recording medium transported in a first direction and a light receiving portion that receives light reflected by the recording medium; a transport path forming unit that forms a part of a transport path for the recording medium; a light transmitting portion that is provided in the transport path forming unit and transmits the light; and plural projection members that are provided to the light transmitting portion so as to project from the light transmitting portion toward the transport path, and that are arranged in a second direction crossing the first direction while each extending in the first direction. | 11-18-2010 |
20100315687 | IMAGE READING DEVICE, IMAGE READING DEVICE SHADING CORRECTION METHOD, AND IMAGE FORMING APPARATUS - An image reading device includes: a light source irradiating a reading target with light; an image sensor receiving incoming reflection light from the reading target and reading the reading target; a plurality of kinds of white reference plates of mutually different brightness levels provided for acquiring a white reference in shading correction; an input part accepting input of selection, as a mode for document reading, between a character mode prioritizing character reproduction and a photo mode prioritizing figure and photo reproduction; and a shading correction part, when the character mode has been selected, perform the shading correction by defining the white reference based on output of the image sensor when the character-mode white reference plate darker than the photo-mode white reference plate has been read. | 12-16-2010 |
20110109945 | Image scanning apparatus and image forming apparatus - An image scanning apparatus includes an image scanning unit that reads an image from an original sheet by scanning an image-formed surface of the original sheet with light in a main-scanning direction and converting light reflected from the image-formed surface into electricity using a photoelectric conversion element; a shading correction unit that performs shading correction on an image signal created by reading the image from the original sheet; a white member that faces a scanning surface of the image scanning unit; and a reference-white-data creating unit that creates reference white data for the shading correction by scanning a surface of the white member using the image scanning unit; and an interval controlling unit that decreases an interval between a scanning surface of the image scanning unit and a surface of the white member when the reference-white-data creating unit creates the referential white data. | 05-12-2011 |
20110164290 | IMAGE READING APPARATUS - In an image reading apparatus, a white reference member for obtaining a reference value used in shading correction in the reading mechanism and an elastic member for cleaning a surface of the transparent member are provided such that respective positions of the white reference member and the elastic member with respect to the transparent member are variable. A controller controls the positions of these members with respect to the transparent member to alternately achieve movement of the white reference member to a position where the white reference member faces the transparent member and movement of the elastic member to a position where the elastic member faces the transparent member. The controller calculates the above reference value using a plurality of detection values read by the reading mechanism through the above positional control. | 07-07-2011 |
20110188092 | IMAGE READING APPARATUS AND IMAGE FORMING APPARATUS - An image reading apparatus includes a reading glass, a second guide member, and a control section. The reading glass and the second guide member together form a document feed path. The second guide member includes a white reference plate. The control section performs, when it is determined that shading correction image data is affected by a stain, a stain location determination of whether the stain is attached to the reading glass or the second guide member according to a tone value variation in the portion of the shading correction image data that corresponds to the stain edge, the variation being along a predetermined distance in the main scanning direction. | 08-04-2011 |
20110249302 | IMAGE READING APPARATUS, IMAGE READING UNIT THEREOF, AND REFERENCE MEMBER THEREOF FOR SHADING CORRECTION - An image reading apparatus which is capable of performing accurate shading correction with simple arrangement while preventing a reference member from being scratched and paper powder and the like dust from being deposited on the reference member. The image reading apparatus comprises an image reading unit. In the image reading unit, a contact glass guides an original on an image reading location. The contact glass is held by a glass holding member. A line image sensor reads the image on the original conveyed on the image reading location, through the contact glass. The image reading unit further comprises a reference member whose image is readable by the image sensor, and a moving mechanism to move the image sensor so as to enable the image sensor to alternatively read the original and a reference surface of the reference member. | 10-13-2011 |
20110261417 | IMAGE READING APPARATUS - An image reading apparatus includes a gain setting section that sets a gain of a signal from image sensor, a reference data reading section that reads white and black reference data, an image reading section, a correction data generation section that generates correction data by synthesizing a substring extracted from white reference data with a substring extracted from black reference data, and a correction section that performs shading correction of image data using the correction data, wherein in a case where the black reference data is equal to or greater than a predetermined threshold value, the gain setting section performs resetting to lower the set gain, the reference data reading section rereads the black reference data by the reset gain, and the correction data generation section generates correction data by synthesizing the substring of the white reference data with the substring of the black reference data that has been reread. | 10-27-2011 |
20120013955 | IMAGE READER, IMAGE FORMING APPARATUS, AND METHOD OF CORRECTING IMAGE DATA - The ratio between first reference data which is acquired by scanning the surface of a white member in a state where the size of a gap is substantially equal to that when a document is scanned and second reference data which is acquired by scanning the surface of the white member in a state where the size of the gap is smaller than that when the document is scanned is calculated as a reference data ratio, and the reference data ratio is stored. In generating shading data for correcting image data of each document, the reference data ratio being stored is multiplied by third reference data which is acquired by scanning the surface of the white member in a state where the size of the gap is substantially equal to that when the document is scanned, thereby generating shading data. | 01-19-2012 |
20120044543 | ORIGINAL READING APPARATUS - An original reading apparatus including: a light source configured to illuminate an original; a line image sensor configured to convert light reflected from the original into an analog output signal; an AD converter configured to convert the analog output signal output from the line image sensor into a digital output signal; a control device configured to control the line image sensor and the AD converter; and a variable gain amplifier provided inside the line image sensor, for adjusting a signal range of the analog output signal. | 02-23-2012 |
20120057209 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - An image forming apparatus includes an image interpolation unit to compute a correct pixel value of a target pixel subject to interpolation of a halftone image. The image interpolation unit includes a base pattern setting unit to set a base pattern including the target pixel, a reference pattern setting unit to set reference pattern in a region peripheral to the target pixel, an analogous pattern acquisition unit to acquire at least one analogous pattern analogous to the base pattern from the reference pattern, a high-resolution pattern creating unit to create a high-resolution pattern having a predetermined resolution or higher by synthesizing the acquired analogous pattern, a pixel value estimating unit to compute an estimated pixel value of the target pixel based on the created high-resolution pattern, and a pixel value determination unit to determine the correct pixel value of the target pixel based on the computed estimated pixel value. | 03-08-2012 |
20120057210 | IMAGE READING APPARATUS, IMAGE FORMING APPARATUS, AND SHADING CORRECTION METHOD - A correction-data generating unit divides, into a matrix of row blocks in a sub scanning direction and column blocks in a main scanning direction, white data on a transfer drum read by a reading unit during a predetermined time period that is shorter than a time period in which the read point of the transfer drum is returned to a position where the reading unit has started reading the first white reference member, calculates, for each column of the matrix, a correction-data candidate value corresponding to a variation ratio of a mean of data of the row blocks in the sub-scanning direction, and determines a minimum value of the calculated correction-data candidate values as the correction data. A shading-data correcting corrects the shading data by using the generated correction data. A shading correcting unit performs shading correction on image data of a document after the correction data is generated. | 03-08-2012 |
20120120457 | IMAGE READING APPARATUS - A method is provided for processing image data read from a book document placed on a platen of an image reading apparatus. The method includes determining a background pixel of the image data based on a luminance difference or a color difference between neighboring pixel arrays, identifying a shadow region based on a luminance change between the neighboring background pixel arrays, discriminatively detecting a shadow of a binding portion and a shadow of a front edge in a document region with reference to a changing direction of shadow luminance, and performing a luminance correction on the shadow region according to characteristics of the shadows. | 05-17-2012 |
20120307317 | IMAGE READING APPARATUS - An image reading apparatus includes a light source device, a reader, a plurality of strip-shaped density reference members, and a shading corrector. The plurality of strip-shaped density reference members that extend along main scanning direction. The plurality of strip-shaped density reference members are separately disposed in at least three positions including an upstream end portion, a center portion, and a downstream end portion in the moving direction of the sub scanning direction within a readable area of the reader. The shading corrector is configured to calculate shading correction data using density distribution data obtained by reading the plurality of strip-shaped density reference members with the reader and correct image data of the printed document on a pixel to pixel basis, based on the shading correction data. | 12-06-2012 |
20130003138 | SHADING DEVICE FOR IMAGE READING SECTION - A shading device includes: a shading member to pass a conveying path for conveying a recoding medium to plural image reading sections and reach the plural image reading sections; and a moving member to move the shading member between the plural image reading sections and a retracted position on the outside of the conveying path. | 01-03-2013 |
20130077132 | IMAGE SCANNING APPARATUS AND METHOD - An image scanning apparatus is provided. The image scanning apparatus includes an image sensor configured to scan a manuscript, a sensor driving unit configured to allow the image sensor to move on a scanning path, a driving control unit configured to generate a driving signal for the sensor driving unit, and a control unit configured to control the image sensor to scan the shading patch during moving to scan the manuscript. | 03-28-2013 |
20130077133 | IMAGE READING APPARATUS, SHADING CORRECTION METHOD THEREFOR, AND PROGRAM FOR IMPLEMENTING THE METHOD - An image reading apparatus including a shading correction mechanism that can be formed by fewer component parts than conventional ones, and is increased in the degree of freedom of design, thereby enabling reduction of the size and weight thereof. A contact glass guides an original to an image reading position. A glass holding member holds the glass. A line image sensor reads an image on the original conveyed to the image reading location, through the contact glass. A reference member is disposed at a location different from the image reading location on the contact glass. A moving mechanism relatively moves the line image sensor and the reference member so that the line image sensor can alternatively read the original conveyed to the image reading location and the reference member. A drive section externally drives the moving mechanism to move the line image sensor and/or the reference member. | 03-28-2013 |
20130170000 | IMAGE SCANNER, AUTO DOCUMENT FEEDER, AND IMAGE FORMING APPARATUS - An image scanner includes: an image sensor that photo-electrically converts reflected light from a document irradiated with light by a light source; an A/D converter that converts an analog image signal output from the image sensor into a digital signal; a lighting control unit that adjusts, in a period other than a document scanning period, a lighting period of the light source so that the light source is turned on and off alternately in a repetitive manner in units of a line cycle; a black correction unit that generates reference black data used for black correction based on effective pixel data in a light source non-lighting period in the period other than the document scanning period; and a white correction unit that generates shading data used for shading correction based on effective pixel data in a light source lighting period in the period other than the document scanning period. | 07-04-2013 |
20130293934 | IMAGE READING APPARATUS THAT PERFORMS SHADING CORRECTION, METHOD OF CONTROLLING THE SAME, AND STORAGE MEDIUM - An image reading apparatus capable of efficiently performing shading correction. The image reading apparatus includes a reading unit that is rotatable for reading an original. A CPU causes the reading unit to read, while the reading unit rotates after reading an image of the original, image data for use in correction of the read image. The CPU performs the correction using the image data read by the reading unit. | 11-07-2013 |
20130321876 | READING-USE HOLDING MEMBER FOR USE WITH IMAGE READING APPARATUS, IMAGE READING APPARATUS, AND CUTTING APPARATUS - A reading-use holding member which is configured for use with an image reading apparatus including an image reading unit and which holds a sheet of workpiece while image reading is performed by the image reading unit, the reading-use holding member including a base being generally planar; an indicator provided at the base and configured to identify a type of holding member when read by the image reading unit; a holding portion provided at the base and configured to hold the workpiece; and a reference portion provided at the base and configured to provide a reference image data for use in a shading correction of an image read by the image reading unit. | 12-05-2013 |
20130321877 | IMAGE READING APPARATUS AND CUTTING APPARATUS - An image reading apparatus including an image reading unit configured to read an image of a workpiece; a plurality of holding members each configured to hold the workpiece while image reading is performed by the image reading unit and each including an indicator identifying a type of holding member; an identification unit configured to identify the type of holding member based on a result of reading of the indicator by the image reading unit; and a correction unit configured to perform a shading correction of the image read by the image reading unit based on a result of identification by the identification unit. | 12-05-2013 |
20140029065 | IMAGE SCANNING DEVICE AND IMAGE FORMING APPARATUS - According to an embodiment, an image scanning device includes: a light source unit that emits light onto an original to be scanned; a photoelectric conversion unit that converts light from the original to an electric signal; a converting unit that converts the electric signal from the photoelectric conversion unit into digital image data; and a black correcting unit that performs black correction by correcting pixel-by-pixel black levels of pixels contained in pre-scanning digital image data obtained before the original is scanned based on a ratio of a dark-current black level of a pixel contained in ongoing-scanning digital image data obtained during scanning of the original to a dark-current black level of the pixel contained in the pre-scanning digital image data, and subtracting the corrected pixel-by-pixel black levels from the ongoing-scanning digital image data. | 01-30-2014 |
20140118797 | IMAGE PROCESSING DEVICE, IMAGE FORMATION SYSTEM AND IMAGE PROCESSING METHOD - An image processing device includes an image acquisition part acquiring first image data, a character detector detecting, based on the first image data, data of a character area in the first image data, a marking detector detecting, based on the first image data, data of a marking area in the first image data, an image adjustment area determination part determining, based on a detection result of the character detector and a detection result of the marking detector, data of an image adjustment area in the first image data, and an image processing part subjecting the data of the image adjustment area in the first image data to image processing to output second image data. | 05-01-2014 |
20140218772 | DOCUMENT READING APPARATUS - An image reading apparatus corrects a deviation of a reading position of a document to accurately correct a luminance intensity distribution variation. Light is radiated to a shading plate ( | 08-07-2014 |
20140355074 | IMAGE READING DEVICE, IMAGE FORMING APPARATUS, AND IMAGE READING METHOD - An image reading device includes a density reference plate, an image reading section, a storage section, and a control section. When density reference data for at least one of a plurality of colors with respect to at least one of a plurality of regions is abnormal data, the control section calculates a change rate. The change rate is a rate of change between preliminary density reference data and density reference data both for one of the colors other than the at least one color with respect to the at least one region. The control section corrects the abnormal data based on the change rate calculated with respect to the at least one region and also on preliminary density reference data for the at least one color with respect to the at least one region. | 12-04-2014 |
20140355075 | IMAGE READING DEVICE, IMAGE FORMING APPARATUS, AND RECORDING MEDIUM - An image reading device includes an image reading section, an image processing section, and a density reference member. Based on a location of a defect in the image reading section or in the density reference member, the image processing section determines whether or not to at least partially restrict either a read range of the image reading section when the image reading section reads an original document or usage of a result obtained by reading the original document by the image reading section. The image processing section determines whether or not to apply a smoothing process to each density value detected by reading the original document by the image reading section. The determination is made based on a comparison between a normal-value determining threshold and each density value detected by reading the density reference member by the image reading section. | 12-04-2014 |
20150092251 | IMAGE SCANNING APPARATUS AND METHOD - An image scanning apparatus is provided. The image scanning apparatus includes an image sensor configured to scan a manuscript, a sensor driving unit configured to allow the image sensor to move on a scanning path, a driving control unit configured to generate a driving signal for the sensor driving unit, and a control unit configured to control the image sensor to scan the shading patch during moving to scan the manuscript. | 04-02-2015 |
20150116789 | READING APPARATUS AND NON-TRANSITORY STORAGE MEDIUM STORING INSTRUCTIONS EXECUTABLE BY READING APPARATUS - A reading apparatus includes a reading device for reading an image on a recording medium and generating image data. The reading apparatus is configured to: receive the generated image data; retrieve a first region location indicator indicating a location of a first region to be defined on an image based on the generated image data, a second region location indicator indicating a location of a second region, a first image processing indicator indicating at least one image processing determined for the first region, and a second image processing indicator indicating at least one image processing determined for the second region; determine first partial image data based on the first region location indicator; execute the at least one image processing; determine second partial image data; and execute the at least one image processing. | 04-30-2015 |
20160021270 | IMAGE READING DEVICE - According to one embodiment, an image reading device includes: an open-close detection unit which detects opening and closing of a cover unit; a document presence-absence detection unit which detects the presence or absence of a document in the sub scanning direction of the document placed on the document table glass; a reference signal generation unit which generates a reference signal for shading correction used for normalization of an output signal from a line sensor which reads the document placed on the document table glass; and a document size finalizing unit which finalizes a document size, based on a target to be detected based on the output signal in a document main scanning direction of the line sensor that is shading-corrected with the reference signal generated at a timing in the course of closure of the cover unit, and on document presence-absence information from the document presence-absence detection unit. | 01-21-2016 |