Class / Patent application number | Description | Number of patent applications / Date published |
358463000 | Noise elimination | 13 |
20090051979 | TONER-BASED NOISE REDUCTION IN ELECTROSTATOGRAPHY - In the method, a digital image is received. A granularity model is constructed of each of the toner stations. A noise table is produced. The noise table is based on the granularity models and is adaptive to the content of the digital image. Noise is reduced in the digital image using the noise table. The digital image is divided into a plurality of color records, each corresponding to a respective toner station. The color records of the noise reduced digital image are printed using respective toner stations. Each granularity model defines a toner applied by the respective toner station. | 02-26-2009 |
20090244647 | 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 operate at different timings, a noise calculation unit that acquires first read data as a result of reading of a first read object as the read object by the plural reading units, acquires an operation state of the plural reading units during the reading of the first read object, and calculates, based on the operation state and the first read data obtained in the operation state, noise information based on the operation state, and a noise removal unit that acquires second read data as a result of reading of a second read object as the read object different from the first read object by the plural reading units, and removes noise from the second read data based on the noise information calculated by the noise calculation unit. | 10-01-2009 |
20100118352 | IMAGE READING APPARATUS FOR DETECTING NOISE IN IMAGE DATA - An image reading apparatus includes: three line sensors mutually spaced in a sub scanning direction; a platen arranged between the original and the three line sensors; a mover moving the platen relative to the three line sensors at a rate relative to the three line sensors, the rate being different from that of the original relative to the three line sensors; a lightness difference detector extracting a feature pixel having a predetermined feature from each of three data output from the three line sensors; and NOR and AND devices comparing the three data corresponding to a single location on the original to detect the feature pixel extracted from one of the three data, as a noise pixel if the feature pixel is not a feature pixel for the other data. | 05-13-2010 |
20110032581 | IMAGE PROCESSING APPARATUS, IMAGE PROCESSING SYSTEM, AND IMAGE PROCESSING METHOD - This invention is directed to an image processing apparatus and method capable of analyzing a character image to detect a blur, and reducing the blur on a printed product. According to the method, a scanner reads an original character image, generating image data. A blur and deterioration of a character image represented by the image data are detected. Portions corresponding to the detected blur or the deterioration are removed from the image data. The image data from which the portions corresponding to the blur or the deterioration are removed is output to an image output unit. | 02-10-2011 |
20110149351 | IMAGE READING DEVICE, METHOD OF READING IMAGE, AND RECORDING MEDIUM STORING CONTROL PROGRAM FOR CONTROLLING IMAGE READING DEVICE - An image reading device includes a transport unit for transporting a document, a scanner for scanning image data of the document transported by the transport unit, and a controller for controlling the image reading device. The controller extracts a plurality of one-character areas included in the image data, recognizes character data of each of the extracted one-character areas, determines presence or absence of line noise based on a result of recognition of each of the one-character areas, and displays presence of the line noise on an operation panel when it is determined that there is the line noise. | 06-23-2011 |
20120062962 | IMAGE READING DEVICE AND IMAGE FORMING APPARATUS - An image reading device is provided with a waveform memory that stores correction waveform data generated based on a digital image signal output from an image signal processing circuit when a light source of the image reading device is turned off, and an image signal correcting circuit that corrects an image signal of an original image using the correction waveform data stored in the waveform memory. | 03-15-2012 |
20130155473 | IMAGE CORRECTION APPARATUS, OVERHEAD IMAGE READING APPARATUS, IMAGE CORRECTION METHOD, AND PROGRAM - An image correction apparatus includes a read image acquiring unit that acquires read image data generated by an imaging device that moves in a sub-scanning direction with respect to a reading medium irradiated with an environmental light to read the reading medium; a selecting unit that selects a correction filter for correcting a pixel of interest in the acquired read image data based on brightness or luminance component of a pixel in a determination filter including the pixel of interest; and a correction unit that corrects tone data of the pixel of interest based on the correction filter selected by the selecting unit. The determination filter includes a plurality of determination filters in which a number of pixels to be used in the sub-scanning direction differs. | 06-20-2013 |
20130271796 | METHOD FOR CAPTURING HIGH-QUALITY DOCUMENT IMAGES - A method for capturing high-quality document images, comprising steps which first attempt to correct deficiencies in a captured image, then subsequently score the corrected image for quality, and finally, use the score to determine whether the image duality is acceptable. Unacceptable images are flagged for recapture. Corrected deficiencies comprise exposure, geometric distortions and extraneous background. Scored attributes comprise focus, contrast, and legibility. | 10-17-2013 |
20130271797 | IMAGE PROCESSING METHOD, IMAGE PROCESSING APPARATUS, AND PROGRAM - When processing image data by referring to at least one of reference image data and correction data, an image is processed in a unit of band area by dividing image data of a target image in a plurality of band areas. In this case, the minimum transfer unit of the image data is set. The minimum transfer unit of at least one of the reference image data and the correction data is obtained to process the image data in the minimum transfer unit. The transfer rate of the image data is determined so that the image data to be buffered fits in a capacity of a buffer available in image processing. The height of the band area to be created by division is determined based on the ratio of the transfer rate of the image data to the minimum transfer unit of the image data. | 10-17-2013 |
20130271798 | IMAGE PROCESSING APPARATUS AND METHOD OF SUPPLEMENTING PIXEL VALUE - Provided is an image processing apparatus including a periodicity determining unit that determines whether a determination area including a target defective pixel is a periodicity area, a first pixel value generating unit that generates a pixel value by a first supplementing method, a second pixel value generating unit that generates a pixel value by a pixel second supplementing method, a control unit that determines which of the first pixel value generating unit and the second pixel value generating unit is to be used based on the determination by the periodicity determining unit, a pixel value supplementing unit that inserts the pixel value generated by the pixel value generating unit determined to be adopted, and a pixel value updating unit that updates pixel values of neighboring pixels of the defective pixel. | 10-17-2013 |
20130342877 | METHOD OF GENERATING A SMOOTH IMAGE FROM POINT CLOUD DATA - A method is explained for processing an array of pixels in a point cloud. Local error bars are calculated for each pixel distance value. A difference is calculated between distance values of the pixel being processed and neighboring pixels with distance values within the error bars. If the difference is outside the error bars, the distance value of the pixel being processed is changed by a small fraction while remaining inside the error bars; if the difference is within the error bars, the pixel value is replaced by a weighted average. The neighboring pixels with distance values within the error bars of the pixel are counted and if a predetermined threshold is met, the counted values are averaged and replace the pixel value, but if not met, the pixel value is unchanged. If loop exit criteria have been met, the loop is terminated and if not, looping begins again. | 12-26-2013 |
20140177009 | IMAGE PROCESSING APPARATUS AND IMAGE SCANNING APPARATUS - An image processing apparatus includes a local maximum point identifying unit, a distribution deriving unit, and a binding position identifying unit. The local maximum point identifying unit is configured to identify positions of local maximum points of densities along a first scanning direction in an input image of a book. The distribution deriving unit is configured to derive a distribution in the first scanning direction of the number of the local maximum point obtained along a second scanning direction perpendicular to the first scanning direction. The binding position identifying unit is configured to identify a binding position in the input image of the book on the basis of a position of a peak in the distribution. | 06-26-2014 |
20150116790 | IMAGE READING DEVICE, IMAGE FORMING APPARATUS, AND IMAGE READING METHOD - An image forming apparatus includes low and high resolution imaging portions, a data generating portion, first and second reading portions, and a reading control portion. The first reading portion acquires, from the high resolution imaging portion, as output data for one pixel, data acquired by n-number of light receiving elements adjacent to each other in a main scanning direction in the high resolution imaging portion. The second reading portion acquires output data from light receiving elements arranged in the main scanning direction from a start position displaced by a distance corresponding to m times a second pitch in the main scanning direction from a first reference position in the high resolution imaging portion, where m is an integer. The reading control portion executes a reading operation for a document by the low and high resolution imaging portions, selecting the first reading portion or selecting both of the reading portions. | 04-30-2015 |