| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 348606000 | Combined noise reduction and transition sharpening | 13 |
| 20080309823 | METHOD FOR PROCESSING AN IMAGE SEQUENCE HAVING CONSECUTIVE VIDEO IMAGES IN ORDER TO IMPROVE THE SPATIAL RESOLUTION - An image sequence includes consecutive video images each exhibiting at least one image region having a number of pixels, where each pixel includes at least one intensity value. For each image a motion measure value is determined indicative of temporal change of a video content of the image region and varying the intensity values of the pixels of the image region relative to the associated intensity values from video image to video image, a measure for the variation of the intensity values being dependent on the motion measure value determined and the change in the intensity values relative to the associated intensity values being greater the larger the motion represented by the motion measure value. | 12-18-2008 |
| 20100165205 | VIDEO SIGNAL SHARPENING APPARATUS, IMAGE PROCESSING APPARATUS, AND VIDEO SIGNAL SHARPENING METHOD - According to one embodiment, a video signal sharpening apparatus includes a video signal sharpening module and a sharpening parameter controller. The video signal sharpening module performs a sharpening process on a decoded video signal based on a sharpening parameter. In the sharpening process, the video signal sharpening module estimates an original pixel value from the decoded video signal and increases the pixels to obtain a high-resolution video signal. The decoded video signal is obtained by a decoder decoding an encoded video signal. The sharpening parameter controller determines the amount of variation in noise and detail component that varies by an I-frame period in a group of pictures (GOP) period of the decoded video signal, and controls the sharpening parameter for the video signal sharpening module. | 07-01-2010 |
| 20100295996 | CIRCUIT AND METHOD FOR IMAGE PROCESSING - A circuit and a method for image processing are provided. The image processing circuit has an adaptor and a sharpening circuit. The adaptor has a processing unit and a weight generator. The processing unit receives an input video signal, and the input video signal has information of a plurality of pixels. The processing unit processes the input video signal to calculate a color difference value of a target pixel of the pixels. The weight generator generates a weighting signal according to the color difference value. The sharpening circuit performs a sharpening operation on the input video signal according to the weighting signal to generate a sharpened video signal. | 11-25-2010 |
| 20110080523 | IMAGE PROCESSING APPARATUS, PROJECTOR, IMAGE PROCESSING METHOD, AND PROGRAM - An image processing apparatus includes: an image information input unit which receives input of first image information; and a sharpness adjustment unit which divides a screen image corresponding to the first image information into a plurality of areas and performs a sharpness adjustment for each of the divided areas to output second image information. | 04-07-2011 |
| 20110141368 | ADAPTIVE EDGE ENHANCEMENT USING DIRECTIONAL COMPONENTS FROM NON-LINEAR FILTERING - A video processing device includes an input to receive pixel values for a set of pixels comprising a pixel window substantially centered around a select pixel that initially has a first pixel value. The video processing device further includes a first filter unit to determine a horizontal transient improvement value based on non-linear filtering of the pixel values in a horizontal direction, a second filter unit to determine a vertical transient improvement value based on non-linear filtering of the pixel values in a vertical direction, a third filter unit to determine a first diagonal transient improvement value based on non-linear filtering of the pixel values in a first diagonal direction, and a fourth filter unit to determine a second diagonal transient improvement value based on non-linear filtering of the pixel values in a second diagonal direction that is perpendicular to the first diagonal direction. The video processing device also includes an output to provide a second pixel value for the select pixel, the second pixel value based on the first pixel value, the vertical transient improvement value, the horizontal transient improvement value, the first diagonal transient improvement value, and the second diagonal transient improvement value. | 06-16-2011 |
| 20120062797 | Methods and Systems for Noise Reduction and Image Enhancement - Aspects of the present invention are related to systems and methods for image enhancement, wherein an input image may be separated into two images: a first image comprising image content, from the input image, which may be sharpened; and a second image comprising image content, from the input image, which may be attenuated. One aspect of the present invention relates to determining a noise estimate associated with the input image and using the noise estimate to control the separation of the input image into the two images. Another aspect of the present invention relates to controlling the image separation based on the level of sharpening being applied to the first image. | 03-15-2012 |
| 20130002959 | Split Edge Enhancement Architecture - A system and method for enhancing the detail edges and transitions in an input video signal. This enhancement may be accomplished by enhancing small detail edges before up-scaling and enhancing large amplitude transitions after up-scaling. For example, detail edge enhancement (detail EE) may be used to enhance the fine details of an input video signal. An edge map may be used to prevent enhancing the large edges and accompanying mosquito noise with the detail enhancement. Noise may additionally be removed from the signal. After the fine details are enhanced, the signal may be up-scaled. Luminance transition improvement (LTI) or chrominance transition improvement (CTI) may be used to enhance the large transitions of the input video signal post scaler. | 01-03-2013 |
| 20130083245 | COMPRESSION ERROR HANDLING FOR TEMPORAL NOISE REDUCTION - A video processor includes a spatio-temporal noise reduction controller to determine current and previous image edge slopes and adaptively control a spatio-temporal noise reduction processor to blend current and previous images dependent on the current and previous image edge slope values. | 04-04-2013 |
| 20130321705 | VIDEO SIGNAL PROCESSING DEVICE AND METHOD - A multiband signal generator generates multiband signals from 21 lines of input data by using a subset of N lines with each line delayed from 1 line to N lines respectively. M line buffers delay the multiband signals such that each line is delayed from 1 line to M lines respectively. An analyzer detects correlations between video data by selecting regions with a maximum size M×M in the multiband signals, and analyzes characteristics of the video data. A multiband signal generator generates multiband signals with cutoff frequencies based on an analysis result from the analyzer, by using the data from 1-line through N-line delayed multiband signal. An amplitude adjuster and synthesizer unit adjusts and synthesizes amplitudes of the multiband signals. | 12-05-2013 |
| 20130335633 | IMAGE SHARPNESS DEVICE AND METHOD FOR THE SAME - An image sharpness device and a method for the same are disclosed. The image sharpness device includes a DC removal unit, at least one filter, at least one noise estimation unit, at least one soft threshold processing unit, and a summing unit. The DC removal unit receives a luminance signal of a field of a frame and removes a DC component of the luminance signal. The filter passes a component of an output of the DC removal unit within a predetermined frequency band. The noise estimation unit estimates a noise value of the field. The soft threshold processing unit forms a sharpness signal according to the noise value. The summing unit sums the luminance signal and the sharpness signal to output a resultant luminance signal. The present invention is capable of avoiding the problem that a noise in the luminance signal is enhanced. | 12-19-2013 |
| 20140002745 | CONTROL OF VIDEO PROCESSING ALGORITHMS BASED ON MEASURED PERCEPTUAL QUALITY CHARACTERISTICS | 01-02-2014 |
| 20140285719 | Guided Filter-Based Detail Enhancement - Systems and methods for generating a detail-enhanced video signal are provided. In a method for generating the detail-enhanced video signal, an input video signal is received. A first signal that is a linear transformation of the input video signal is generated. A detail signal is generated by determining a difference between the input video signal and the first signal, where the detail signal includes information that is added to the input video signal to generate the detail-enhanced video signal. A filtered detail signal is generated by removing noise from the detail signal. The filtered detail signal is multiplied by a gain function to generate a second signal. The gain function is based on an amount of variance in the input video signal. The input video signal and the second signal are combined to generate the detail-enhanced video signal. | 09-25-2014 |
| 20150373234 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - An image is sharpened without generating, in frequency domain exceeding frequency component in horizontal and vertical direction, frequency component caused by sharpening carried out in horizontal and vertical direction in overlapping manner. An image processing apparatus includes: a vertical filter removing high frequency portion in vertical direction; a horizontal sharpening processing unit generating harmonic in horizontal direction containing frequency higher than frequency component in horizontal direction of the input signal; a horizontal filter removing high frequency portion in horizontal direction; and a vertical sharpening processing unit generating harmonic in vertical direction containing frequency higher than frequency component in vertical direction of the input signal, wherein a horizontal direction processing unit in which the vertical filter is disposed before the horizontal sharpening processing unit and a vertical direction processing unit in which the horizontal filter is disposed before the vertical sharpening processing unit are connected in series, or in parallel. | 12-24-2015 |
