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| Number | Title | Issue Date |
| 8077993 | Error diffusion-based image processing In an embodiment, a method includes receiving values of a first pixel and a second pixel of an image at an input processor element of an image signal processor and distributing fractional parts of a number of values from surrounding pixels to the first pixel and the... | 12/13/2011 |
| 8055088 | Deterministic wavelet thresholding for general-error metrics Novel, computationally efficient schemes for deterministic wavelet thresholding with the objective of optimizing maximum-error metrics are provided. An optimal low polynomial-time algorithm for one-dimensional wavelet thresholding based on a new dynamic-programming ... | 11/08/2011 |
| 8045816 | Image quantization method and apparatus with color distortion removing quantization matrix An image quantization method and apparatus are provided in which a block with a high possibility of having color distortion is more elaborately quantized using a predetermined color distortion removing quantization matrix. The image quantization method includes dete... | 10/25/2011 |
| 7933461 | High-speed dithering architecture A filter for implementing Floyd Steinberg two-dimensional error diffusion algorithms allows high-speed processing of video and images. The filter is shown in direct form with proper bit precision with implementations that permit the filter to operate at high speed. ... | 04/26/2011 |
| 7738719 | Method and device for processing video data by combining error diffusion and another dithering For improving the grey scale portrayal, several dithering methods are used: Cell-based dithering, multi-mask dithering or error diffusion. Each of them has specific disadvantages. A simple combination of them does not bring expected advantages. However, an improveme... | 06/15/2010 |
| 7729552 | Apparatus and method for improving qualities of motion and still images to be output in a mobile communication terminal An apparatus and method for improving qualities of motion and still images to be output in a mobile communication terminal. An error-reflected-value table is provided to reduce a computation amount while applying an error diffusion process. The table includes quanti... | 06/01/2010 |
| 7684633 | System and method for image file size control in scanning services A system and method for controlling the work flow or processing of scanned images is disclosed. The system and method identify appropriate image processing techniques, particularly techniques well-suited to enable image compression yet maintain image quality so as t... | 03/23/2010 |
| 7672525 | Image processing method, program, storage medium, and apparatus for executing a quantization process of image data by error diffusion An image processing method for executing a quantization process of image data by error diffusion, executes a step of generating first image data by adding a quantization error to input image data, a step of generating second image data by quantizing the first image ... | 03/02/2010 |
| 7639887 | Error diffusion-based image processing In an embodiment, a method includes receiving values of a first pixel and a second pixel of an image at an input processor element of an image signal processor and distributing fractional parts of a number of values from surrounding pixels to the first pixel and the... | 12/29/2009 |
| 7627188 | Error diffusion method and hardware architecture A system and method for performing threshold stamping are disclosed. First and second threshold values corresponding to first and second pixels may be retrieved from a threshold memory. A plurality of upscaled threshold values may optionally be computed based on the... | 12/01/2009 |
| 7606436 | Image encoding apparatus and quantization control method An image encoding apparatus includes a quantization control section that supplies a rounded Q-scale to a quantization section for quantizing each macroblock according to the rounded Q-scale. A Q-scale is generated for each macroblock based on the amount of generated... | 10/20/2009 |
| 7486834 | System and method for dynamically shifting error diffusion data Error diffusion is performed using a Floyd-Steinberg-like approach. A integer-representation of a running error is compressed by storing only its most significant bits and returning any remainder to the error diffusion processor. The running error is shifted to the ... | 02/03/2009 |
| 7460727 | Error diffusion method and hardware architecture A system and method for performing threshold stamping are disclosed. First and second threshold values corresponding to first and second pixels may be retrieved from a threshold memory. A plurality of upscaled threshold values may optionally be computed based on the... | 12/02/2008 |
| 7440632 | Technique for performing error diffusion A technique to perform error distribution in a graphics system. More particularly, embodiments of the invention include at least one technique to distribute the error resulting from converting computer generated graphics pixels from one pixel depth to another. ... | 10/21/2008 |
| 7440139 | Systems and methods for controlling a tone reproduction curve using error diffusion A method of adjusting a TRC of an image is provided. The method involves receiving an image at an input resolution, resampling the image to a processing resolution if the imput resolution and the processing resolution are not same, processing the image using rank-or... | 10/21/2008 |
| 7436969 | Method and system for optimizing denoising parameters using compressibility In various embodiments of the present invention, a noisy signal denoiser is tuned and optimized by selecting denoiser parameters that provide relatively highly compressible denoiser output. When the original signal can be compared to the output of a denoiser, the de... | 10/14/2008 |
| 7436884 | Method and system for wavelet packet transmission using a best base algorithm A data compression system and method provides a best base searching method to determine the best orthogonal basis function for wavelet-based, data compression. A processing device may receive data signals from a source and wavelet-based data compression may be perfo... | 10/14/2008 |
| 7433064 | Printing apparatus, printing method, image processing apparatus, image processing method, printing program, image processing program, and storage medium A printing apparatus includes: a unit that generates test pattern data considering visual characteristics, on the basis of a test pattern grayscale value determined on the basis of visual sensitivity; an N-value conversion unit that converts the test pattern data ge... | 10/07/2008 |
| 7430064 | Rotation dependent halftone rendering in scanning A method and system for rotation-dependent halftone rendering. An image input is received from a scanning system or other source, the received image being either a contone image or an error-diffused mage. If a following right-angle image rotation is to be performed,... | 09/30/2008 |
| 7420571 | Method for processing a gray level in a plasma display panel and apparatus using the same A system and method for processing a gray level in a display device performs a random error diffusion operation on the video data using a first random coefficient value and a random dithering operation on the error-diffused video data using a second random coefficie... | 09/02/2008 |
| 7420708 | Method for processing color image data employing a stamp field A method for processing image data that employs a stamp field that contains data representing a distance metric for use with a variety of error diffusion operations. The distance metric possesses distance-order preservation permitting the distance from a previous do... | 09/02/2008 |
| 7417772 | Vector error diffusion A vector error diffusion (VED) method employable in cycles with respect to a hi-tonal color printing engine which prints bi-tonal color images in a device output color space. The method generally includes (a) acquiring input color-image data which is characterized w... | 08/26/2008 |
| 7411707 | Image processing apparatus and method thereof Even when a color difference diffusion (CD) method which allows high-speed color separation is used, it is difficult to attain preferred color reproduction corresponding to various user's requirements using a small-scale circuit. Hence, a color converter color-conve... | 08/12/2008 |
| 7373009 | Method and apparatus for efficient transmission and decoding of quantization matrices A method for encoding quantization matrices comprising the steps of (A) signaling whether values of a luma quantization matrix are determined by either (i) a first set of custom values or (ii) a set of standardized default values, (B) transmitting the first set of c... | 05/13/2008 |
| 7369710 | Image processing device, image processing method and image processing program An image processing device performs an error diffusion on multilevel input image data to generate multilevel output image data that has fewer levels than the multilevel input image data. The image processing device includes a plurality of setting devices, each of wh... | 05/06/2008 |
| 7369276 | Multi-level halftoning providing improved texture uniformity A method for multi-level halftoning an input digital image to form an output digital image which includes a multi-level error diffusion halftoning process incorporating periodic dither signals whose amplitudes are adjusted as a function of the error-diffusion textur... | 05/06/2008 |
| 7362472 | Color error diffusion A method for multi-toning an input digital image having input pixels with two or more color channels to form an output digital image having modified output levels. The method includes producing an error signal for each color channel, combining the error signals to p... | 04/22/2008 |
| 7359569 | Method of reducing a blocking artifact when coding moving picture A method of coding a moving picture is provided that reduces blocking artifacts. The method can include defining a plurality of defining pixels S0, S1, and S2, which are centered around a block boundary. If a default mode is selected... | 04/15/2008 |
| 7359084 | Preview display for multiple-sided printing Displaying of document information to be printed in a printing apparatus capable of inserting, during printing on print sheets fed from a predetermined sheet feed unit, a plurality of types of sheets from sheet feed units different from the predetermined sheet feed ... | 04/15/2008 |
| 7355747 | System for improving the speed of data processing An apparatus includes a first processing device to perform halftoning on a first set of values corresponding to a first set of pixels and a second processing device to perform halftoning on a second set of values corresponding to a second set of pixels, with ones of... | 04/08/2008 |
| 7352489 | Color error diffusion method for multi-level output device An improved color-image error diffusion process for use in conjunction with the operation of a multi-level, halftone, color-image output device. This process involves, first, performing output-device-dependent color error diffusion on color-image input data utilizin... | 04/01/2008 |
| 7352916 | Method of coding artifacts reduction A method to reduce coding artifacts within a discrete decoded picture includes a spatial and/or temporal filtering with respective filter characteristics dependent on an image quality value (Q). Preferably, the spatial filtering includes a deblocking filtering, wher... | 04/01/2008 |
| 7353447 | System and method for representing compressed information The present invention provides a system and method for storing re-synchronization, error correction and/or error detection data within an existing communication protocol, while still maintaining full compliance to a standard, such as the MPEG-2 AAC standard. By doin... | 04/01/2008 |
| 7342684 | Image processing method and apparatus It is an object of this invention to prevent a false edge phenomenon in quantization processing for a multilevel image. In order to achieve this object, according to the invention, (1) a reference threshold (Cthreshold) to be used for error diffusion for a cyan (C) ... | 03/11/2008 |
| 7342679 | Image evaluation apparatus and method An image evaluation program is implemented in an image evaluation apparatus to evaluate a dot of an image that is reproduced on a support medium by an imaging apparatus and formed by a plurality of dots having a predetermined dimension arranged in a main scanning di... | 03/11/2008 |
| 7342688 | Apparatus for eliminating moire in scanned image and method for the same A method for eliminating moire in scanned digital image comprises the steps of using an average circuit for taking weighted average and error diffusing a gray level difference between an error diffusion pixel Gij and neighbor pixels to neighbor to obtain ... | 03/11/2008 |
| 7339706 | Error diffusion processing circuit for an image signal which improves an output image An error diffusion processing circuit includes an error diffusion processing unit and a noise signal unit. The error diffusion processing unit generates a first output image signal of a first pixel by carrying out an error diffusion process, based on an inputted fir... | 03/04/2008 |
| 7336852 | Image processing apparatus, image reading apparatus, image forming apparatus and recording medium for image processing program An image processing apparatus, an image reading apparatus, an image forming apparatus and a computer-readable recording-medium for storing an image processing program are disclosed. The image processing apparatus can synthesize coded data encoded in accordance with ... | 02/26/2008 |
| 7336398 | Error prediction method for halftone processing An error diffusion method applied to halftone processing for image data. The image data comprise a plurality of pixels. The method comprising the steps of dividing the image data into a plurality of image blocks; selecting one of the pixels belonging to each of the ... | 02/26/2008 |
| 7331524 | Feedback mechanism for scanner devices A bar code reader indicator feature gives visible indication that a bar code function has been performed. The feature is integrally molded with the exit window to simplify the design and reduce cost. The feature can diffuse light from an existing indicator light wit... | 02/19/2008 |
