Patent application number | Description | Published |
20110222077 | IMAGE FORMING APPARATUS AND DENSITY UNEVENNESS CORRECTION METHOD - Disclosed is an image forming apparatus including: an image forming section to write a latent image, and to develop the latent image to form an image; a misalignment detecting section to detect misalignment amount of a sheet in the main scanning direction on a sheet conveying path to the image forming section; a storage section to store the misalignment amount; a density measuring section to measure density of a plurality of preset positions and to generate measurement data; and a control section to adjust a writing position on the image carrier; to allow the image forming section to output the sheet on which a density measuring image is formed; and to convert the position on the sheet of the measurement data to the writing position on the image carrier and to generate correction data; and a density unevenness correcting section to correct the density of the image. | 09-15-2011 |
20120026554 | IMAGE PROCESSING APPARATUS - An image processing apparatus including: a contour extraction unit that extracts a contour pixel; a screen processing unit that sets a screen threshold matrix composed of a plurality of components each of which stores a threshold value, performs a screen process to input image data, and outputs processed image data; a screen dot determination unit that sets a dot output determination threshold matrix, and determines whether the screen dot is output to a first pixel or a second pixel around the first pixel; and a contour processing unit that outputs a pixel value of the processed image data to the contour pixel when the screen dot is output to the contour pixel or a pixel around the contour pixel, and outputs a contone pixel value to the contour pixel when the screen dot is not output to the contour pixel or the pixel around the contour pixel. | 02-02-2012 |
20120224775 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - Disclosed is an image processing apparatus including: an image compression conversion unit that, in an event of quantizing an image having attribute data for each pixel, creates a density pattern in which pixel values of plural pixels composing a region as a quantization target are binarized, quantizes the region based on the density pattern, and binarizes, for each pixel, the attribute data individually owned by the plural pixels composing the region; and an image extension conversion unit that, in an event of decoding the image of the region quantized based on the density pattern by the image compression conversion unit, decides a density pattern of the region before the quantization in response to an attribute pattern that is based on the binarized attribute data of each of the plural pixels composing the region, and decodes the region in response to the decided density pattern. | 09-06-2012 |
20130057924 | IMAGE PROCESSING DEVICE AND IMAGE PROCESSING METHOD - Provided is an image processing device including: an outline detection unit which analyzes image data to detect an outer edge pixel forming the outline of image, and to determine an edge direction of the outer edge pixel; a thinning unit which processes thinning by reducing a pixel value of the outer edge pixel; and an outline adjusting unit. The outline adjusting unit determines a correction value of front end fading to be adopted to the outer edge pixel, depending on sheet-feeding direction when the image data is printed and the edge direction of the outer edge pixel; reduces the correction value of front end fading, depending on the ratio of reduction by the thinning of the pixel value of the outer edge pixel; and corrects the front end fading by adding the reduced correction value to the pixel value of the outer edge pixel. | 03-07-2013 |
20130215436 | IMAGE PROCESSING DEVICE AND IMAGE PROCESSING METHOD - An image forming device includes: a rasterizing section, a resolution converting section and a thinning section. The rasterizing section generates, by rasterization, image data having any one of standard resolution, resolution higher than the standard resolution and resolution lower than the standard resolution. The resolution converting section converts the resolution upon rasterization for the generated image data having the higher or lower resolution than the standard resolution into the standard resolution. The thinning section thins the image data having the standard resolution. When thinning the image data of which the resolution is converted higher than upon rasterization in the resolution converting section, the thinning section adjusts thinning strength to become larger upon thinning than when thinning the image data of which the resolution upon rasterization is kept as it is. | 08-22-2013 |
20140376013 | IMAGE FORMING SYSTEM - Disclosed is an image forming system, including: a conveying unit configured to convey recording paper; an image forming unit configured to print an image on the recording paper; an image reading unit configured to optically read the recording paper and to obtain a read image; and a correction control unit configured to control an execution of a test operation in which a test pattern including one or more thin lines are printed on the recording paper by the image forming unit and in which the test pattern is read by the image reading unit, to collect information indicting operation state of each unit in the execution of the test operation, to evaluate the thin lines in the read image obtained in the test operation in consideration of the collected information and to carry out a correction relating to printing of a specified thin line. | 12-25-2014 |
20150178962 | IMAGE PROCESSING APPARATUS, IMAGE FORMING APPARATUS, IMAGE GENERATING METHOD, AND MEDIUM - An image processing apparatus includes: an image generating section to generate an image having a gradation value for each pixel by a rasterizing process; and a position correcting section to correct a position of a certain region of the image on a pixel basis. The image generating section generates the image including a line image by the rasterizing process, so that a line width of the line image is adjusted to be equal to or more than twice a minimum line width which can be generated by the rasterizing process. | 06-25-2015 |
20160134780 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - An image processing apparatus includes a contour extracting unit, a contour processing unit, a dithering unit and a binarizing unit. The contour extracting unit extracts a contour pixel forming a contour part from pixels of image data having multiple gradation values. The contour processing unit performs adjustment to reduce a gradation value of the contour pixel extracted by the contour extracting unit. The dithering unit binarizes, by using a blue noise dither matrix, the gradation value of the contour pixel subjected to the adjustment by the contour processing unit. The binarizing unit binarizes, of the pixels of the image data, a gradation value of a non-contour pixel which is other than the contour pixel. | 05-12-2016 |