| Patent application number | Description | Published |
|---|
| 20090161010 | IMAGE INTERPOLATION WITH HALO REDUCTION - An image interpolator is presented that utilizes a block-based motion estimator to provide block-based motion vectors and a motion vector select coupled to the block-based motion estimator to provide pixel based motion vectors. A first image interpolator provides a first interpolated image from the selected motion vectors. A second image interpolator corrects the selected motion vectors, including a correction for halo reduction. Post processing can be utilized to further reduce the halo effect. | 06-25-2009 |
| 20090161763 | MOTION ESTIMATION WITH AN ADAPTIVE SEARCH RANGE - A method and apparatus for estimating motion of a pixel block in a first frame, the method including searching a first area in a second frame to identify a first matching block that corresponds to the pixel block, the first matching block including a first error value that is a minimum of at least one error criteria between the pixel block and the first matching block, calculating a first motion vector associated with the first matching block. The method further including searching a second area in the second frame to identify a second matching block that corresponds to the pixel block, the second matching block including a second error value that is a minimum of the at least one error criteria between the pixel block and the second matching block, calculating a second motion vector associated with the second matching block and selecting a final motion vector between the first and second motion vectors based on the first and second error value. | 06-25-2009 |
| 20110019094 | SYSTEM AND METHOD FOR RANDOM NOISE ESTIMATION IN A SEQUENCE OF IMAGES - A system and method for estimating random noise in an image frame or a sequence of image frames are presented. In some embodiments, the method includes performing Global Noise Estimation by comparing current and past filtered frames; converting global noise estimates into local noise estimates using estimated noise parameters based on current input image's local mean intensity; and providing local noise estimates to an adapted generic spatio-temporal filter. A parameter-based noise model is applied in the noise calculation. | 01-27-2011 |
| 20110019934 | BLOCK ARTIFACT REDUCER - A block artifact reduction system is provided. An apparatus for reducing block artifact in an image sequence according to some embodiments of the present invention includes a motion detection unit that detects a motion signal from a first frame of an image signal and a second frame of the image signal; a block border offset and motion-based correction determination (BOMCS) unit that determines block border locations based on the second frame and a correction strength based on the second frame and the motion signal; and an intensity filter that filters the second frame based on the block border locations and the correction strength to output a corrected image signal. | 01-27-2011 |
| 20110216831 | APPARATUS AND METHOD FOR MOTION VECTOR FILTERING BASED ON LOCAL IMAGE SEGMENTATION AND LATTICE MAPS - A method and an apparatus for filtering motion vector fields provided by a motion estimator apparatus are disclosed. The method includes receiving an input image, determining a motion vector field associated with the input image, determining a local segmentation image, forming a lattice map to identify periodic structures, using the local segmentation image and the lattice map to obtain an image segment pixel count and an image/motion segment pixel count, and using the segment pixel count and the image/motion segment pixel count to provide a filtered motion vector field. Some embodiments further include a motion estimation apparatus including an image delay apparatus, a lattice detector to find lattice structures in the input and delayed images, a histogram generator and a histogram analyzer to provide a set of horizontal and vertical search masks, a motion vector estimator to provide a motion vector field, and a motion vector filter as provided herein. | 09-08-2011 |
| 20110255004 | HIGH DEFINITION FRAME RATE CONVERSION - An image interpolator for high-definition images is presented that utilizes a two or more level hierarchical decomposition for complexity reduction. At the lowest level, after a block-based motion estimator, a pixel-based motion vector selector and a motion vector-based halo reducer, an occlusion-based adaptive motion field interpolator provides preliminary motion vectors for higher resolution level. At the high resolution level, a new motion estimation refining based on the double consideration of eventual occlusion region and motion vector precision refines the preliminary motion vectors, and again a motion vector-based halo reduction re-corrects the refined motion vectors. A new motion compensated image interpolator with controllable features for multiple interpolated images is presented. A versatile post-processing configuration for remaining artifacts may also be included. | 10-20-2011 |
