| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 382252000 | Error diffusion or dispersion | 21 |
| 20080226188 | THRESHOLD MODIFICATION FOR LIMIT CYCLE REMOVAL IN VECTOR ERROR DIFFUSION - A device and method is provided for breaking up undesirable patterns in vector error diffusion when the sum of inputs is near fraction values of the total input range. In the method, the value of the sum is calculated modulo the maximum input value. The mod value tendency to produce limit cycles is then determined for multiple planes in a manner similar to that for an individual plane. The threshold process for the vector calculation can then be modified to break up the cycles that occur in the combinations of the multiple colors. Typically, the largest of the individual plane modifications and the vector sum mod value is used for threshold modification. At least two different types of threshold modifications are possible: (1) random or psuedo-random noise address to the threshold; and (2) non-contiguous regions of threshold. | 09-18-2008 |
| 20080247659 | Universal-denoiser context-modeling component and context-modeling method - In various embodiments of the present invention, a context-based denoiser is applied to each noisy-image symbol embedded within a context to determine a replacement symbol for the noisy-signal symbol. The context-based denoiser includes a context-modeling component that efficiently generates context classes and symbol-prediction classes, assigns individual contexts to context classes and symbol-prediction classes, collects symbol-occurrence statistics related to the generated context classes and symbol-prediction classes, and, optionally, generates noisy-symbol predictions. | 10-09-2008 |
| 20080310748 | IMAGE PROCESSOR, IMAGE-PROCESSING METHOD, AND COMPUTER-READABLE MEDIUM - An image processor has: a unit that executes a conversion process on input image data represented by pixels of M grayscales (M≧3), to convert the input data into output image data represented by sub-pixels of two grayscales; and a unit that outputs the output data, wherein the conversion process includes: a process to determine a filling pattern of sub-pixels corresponding to a pixel of interest of the input data according to a corrected grayscale value obtained by adding a correction value to a grayscale value of the pixel of interest; and the pattern includes a core pattern which forms a core of a dot and a growth pattern which grows a dot, the correction value includes a diffused error, and at least a part of the diffused error obtained by weighting an error of a pixel determined as the core pattern is not included in the correction value. | 12-18-2008 |
| 20090041367 | QUANTIZATION METHOD AND APPARATUS - Quantization for oversampled signals with an error minimization searches based upon clusters of possible sampling vectors where the clusters have minimal correlation and thereby decrease reconstruction error as a function of oversampling (redundancy) ratio. | 02-12-2009 |
| 20090087114 | Response Time Compression Using a Complexity Value of Image Information - An apparatus includes a control module and an activity module. The control module provides error control information based on a target number of bits and an actual number of bits required to pack at least one compressed block of image information. The activity module provides a quantization factor based on the error control information and a complexity value of the at least one compressed block of image information. The quantization factor is used to pack the at least one compressed block of image information into a bitstream comprising the target number of bits. | 04-02-2009 |
| 20090196519 | 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 right until only the desired number of significant bits remain, and this compressed error is stored. Any portion of the original running error that is lost due to the shifting is treated as a remainder and is returned to the error diffusion processor for use in calculating an adjusted current pixel value. The amount of the shift is retained in compressed form to keep track of the number of shifts needed to form a truncated running error from the compressed running error. | 08-06-2009 |
| 20100008594 | METHOD FOR CORRECTING A QUANTIZED DATA VALUE AND ASSOCIATED DEVICE - Where a quantized data value is produced by a first quantization of an input data value, followed by a first inverse quantization and subsequently by a second quantization and the first quantization has first quantization intervals and the second quantization has second quantization intervals, third quantization intervals are generated by displacing interval boundaries of the second quantization intervals, respectively, to the next interval boundaries of the first quantization intervals. A third reconstruction value is determined for the third quantization intervals such that the third reconstruction value lies within the associated third quantization intervals. A corrected data value is generated by a third inverse quantization of the quantized data value and the third inverse quantization is affirmed by the third quantization intervals containing the associated third reconstruction value. | 01-14-2010 |
| 20100054619 | METHOD AND APPARATUS FOR INVERSE QUANTIZING IMAGE, AND METHOD AND APPARATUS FOR DECODING IMAGE - Provided are method and apparatus for inverse quantizing an image, the method including: determining a quantization step correction value for reducing a quantization error, which is a difference between an inverse quantization coefficient, obtained by inverse quantizing a quantization coefficient, and an original value of the transformation coefficient; and inverse quantizing the quantization coefficient using a second quantization step value, the second quantization step value being obtained by correcting a first quantization step value used for inverse quantizing the quantization coefficient using the determined quantization step correction value. | 03-04-2010 |
| 20100061647 | IMAGE COMPRESSION METHOD AND DEVICE THEREOF - An image compression method and a device thereof are provided. In the image compression method, a block image having a plurality of pixels is received. In the block image, an adjusted value of a first pixel is compared with a threshold value, and the adjusted value of the first pixel is accordingly quantized as a first parameter value or a second parameter value so as to obtain a quantized value of the first pixel. Next, an error value between the adjusted value of the first pixel and the quantized value of the first pixel is distributed to at least one second pixel adjacent to the first pixel according to an error diffusion kernel. The first pixel and the second pixel are respectively one of the above pixels. Therefore, the quality of the compressed image is improved and the influence of the blocking effect is reduced. | 03-11-2010 |
| 20100183234 | APPARATUS, METHOD, AND PROGRAM - It is an objective of the present invention to provide an apparatus by which the processing required to perform the average density storage method on the hardware can be performed with a higher speed. | 07-22-2010 |
| 20100246987 | Surround Error Diffusion - Machine-enabled methods of, and system, and processor readable media, embodiments for, tone quantization error diffusion. | 09-30-2010 |
| 20100303370 | VIDEO DECODING DEVICE AND VIDEO DECODING METHOD - A video decoding device includes a decoder configured to decode a plurality of separate partial areas of each of pictures included in encoded video data and a motion vector indicating a positional relationship between each of the partial areas and a partial area of a different picture referenced in order to encode the partial area; an error detector configured to detect, as an error area, a partial area that is unable to be decoded by the decoder from among the plurality of partial areas; a referenced area determiner configured to determine a referenced area of a third picture that has already been decoded, the referenced area corresponding to the error area; a concealment unit configured to conceal the error area using data included in the referenced area; and an image integrator configured to reproduce the first picture. | 12-02-2010 |
| 20110123129 | ERROR DIFFUSION METHOD AND LIQUID CRYSTAL DISPLAY USING THE SAME - An error diffusion method includes: simultaneously receiving first to nth (n is a positive integer of 2 or larger) pixel data at every clock; adding a quantization error stored in a memory to each of the first to (n−1)th pixel data and quantizing them into data having a smaller number of bits than the number of input bits; adding the quantization error stored in the memory to the nth pixel data and quantizing it into data having a smaller number of bits than the number of input bits; diffusing the quantization errors of the first to (n−1)th pixel data to nearby pixels excluding the first to nth pixels by using a first error diffusion mask, and storing the diffusion results of the quantization errors of the first to (n−1)th pixel data in the memory; and diffusing the quantization error of the nth pixel data to pixels around the nth pixel by using a second error diffusion mask, and storing the diffusion results of the quantization error of the nth pixel data in the memory. | 05-26-2011 |
| 20110188769 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - The present invention enables a reduction in circuit scale. | 08-04-2011 |
| 20120070095 | METHOD OF COMPRESSING IMAGE DATA - In a method of compressing image data which include a plurality of pixel values which are associated with a respective pixel, the pixel values are coded for at least some pixels in accordance with the following steps:
| 03-22-2012 |
| 20120093430 | IMAGE PROCESSING METHOD AND DEVICE - An image processing method includes the step of generating an error diffusion value; detecting an edge at a current pixel of an image; and adding the pixel value of the current pixel with the error diffusion value or an error diffusion seed according to the detecting result. | 04-19-2012 |
| 20120121201 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - M-value image data is inputted; a value of a pixel of interest in the inputted image data is quantized to N(N>M) value by an error diffusion method; it is determined whether both of a value of the pixel of interest to be quantized and an error value to be added to the pixel of interest are zero; and if it is determined that the value of the pixel of interest and the error value are zero, zero is outputted as a quantization result without performing quantization by the error diffusion method. | 05-17-2012 |
| 20130064466 | APPARATUS AND METHODS FOR RE-COMPRESSION HAVING A MONOTONIC RELATIONSHIP BETWEEN EXTENT OF COMPRESSION AND QUALITY OF COMPRESSED IMAGE - A computerized method for independent disjoint block-level recompression of a first image generated by independent coding of disjoint blocks in a precursor image, the first image having at least one first quantization matrix associated there-with, the method comprising performing at least one independent disjoint block-level compression operation, using a processor on the first image, thereby to generate a re-compressed second image including generating a new quantization matrix and using the new quantization matrix for the independent disjoint block-level compression, including computing a rounding error created by the quantization process utilizing the new quantization matrix and, if needed, adjusting at least one value of the new quantization matrix to reduce a rounding error created by the quantization process utilizing the new quantization matrix. | 03-14-2013 |
| 20130322775 | IMAGE PROCESSING METHOD AND IMAGE PROCESSING APPARATUS - An image processing apparatus includes a first error diffusion unit, a second error diffusion unit, and a first determining unit, wherein the second error diffusion unit performs error diffusion processing in parallel with the first error diffusion unit and has an operating unit and a calculation unit, and the first determining unit determines whether quantized data for the second pixel of interest is fixed by the second error diffusion unit on the basis of whether the total of value is equal to or lower than a first reference value and whether the total of value is equal to or higher than a second reference value that is higher than the first reference value. | 12-05-2013 |
| 20150110411 | MULTI-BIT ERROR DIFFUSION - The present invention generally relates to systems and methods for error diffusion, e.g., for use in a halftone process. The described techniques are faster than known techniques in that they utilize fewer computations on average. Consequently, the described techniques can be more readily implemented in software, for example, though the described techniques are not limited to software. | 04-23-2015 |
| 20150110412 | MULTI-BIT ERROR DIFFUSION - The present invention generally relates to systems and methods for error diffusion, e.g., for use in a halftone process. The described techniques are faster than known techniques in that they utilize fewer computations on average. Consequently, the described techniques can be more readily implemented in software, for example, though the described techniques are not limited to software. | 04-23-2015 |
