Patent application number | Description | Published |
20090052805 | VIDEO FRAMING CONTROL - In the creation of video program material, picture composition decisions—especially framing parameters—taken by an operator for small-display presentation of a scene are used the automatic generation of picture composition decisions for a larger display. Framing parameters such as pan, are temporally filtered before being applied to the wider field of view provided for the larger display. | 02-26-2009 |
20100316297 | DETECTION OF NON-UNIFORM SPATIAL SCALING OF AN IMAGE - Systems and methods to detect non-uniform spatial scaling of an image in the horizontal direction (for example in 4:3 to 16:9 aspect ratio conversion). The image is divided into regions and a comparison is made between measures of horizontal spatial frequency energy for the different regions | 12-16-2010 |
20110085733 | DEFINING IMAGE FEATURES AND USING FEATURES TO MONITOR IMAGE TRANSFORMATIONS - For monitoring an image transformation such as aspect ratio conversion, an image feature is defined by identifying a position in the image having a local spatial maximum value and then identifying four other positions in the image having local spatial minimum values such that the four minimum value positions surround the position of the maximum, a first pair of the minimums lie on a first line passing through maximum and a second pair of the minimums lie on a second line passing through the maximum. | 04-14-2011 |
20110205369 | OBJECTIVE PICTURE QUALITY MEASUREMENT - To assess picture impairment due to the interpolation of output images from input images, for example in standards conversion, an output image detail measure is compared with an input image detail measure. One of the image detail measures is obtained by interpolation between image detail measures for at least two images. | 08-25-2011 |
20120226728 | ADAPTIVE SIGNAL PROCESSING - An adaptive low pass filtering process with a filter delay D | 09-06-2012 |
20120230580 | ANALYSIS OF STEREOSCOPIC IMAGES - A method of processing in an image processor a pair of images intended for stereoscopic presentation to identify left-eye and right-eye images of the pair. The method includes dividing both images of the pair into a plurality of like image regions, determining for each region a disparity value between the images of the pair to produce a set of disparity values, deriving for each region a confidence factor for the disparity value, determining a correlation parameter between the set of disparity values and a corresponding set of disparity values from a disparity model, in which the contribution of the disparity value for a region to the said correlation parameter is weighted in dependence on the confidence factor for that region, and identifying from said correlation parameter the left-eye and right-eye images of the pair, wherein the left eye and right images form a stereoscopic pair. | 09-13-2012 |
20130194493 | DETERMINING ASPECT RATIO FOR DISPLAY OF VIDEO - The intended display aspect-ratio for video is determined automatically by analyzing an image to identify image blocks resulting from prior block-based processing of the video; comparing horizontal and vertical dimensions of those image blocks with horizontal and vertical dimensions of the image, with black border regions excluded as necessary; and determining from that comparison a display aspect ratio for the video. | 08-01-2013 |
20140028911 | INTERPOLATION OF IMAGES - Apparatus for interpolating images generates motion vectors having a vector confidence value and has a motion compensated interpolation to use the motion vectors to interpolate a new image from two input images at a position determined by a phase control signal. The vector confidence values are used to generate an interpolation confidence measure. The phase control signal is then modified to offset the position at which the new image is interpolated toward the position of the closer of the two input images, if said interpolation confidence measure reduces. | 01-30-2014 |
20140032176 | VIDEO OR AUDIO PROCESSING FORMING AN ESTIMATED QUANTILE - A method of video or audio processing receives a sequence of sample values, each corresponding with a location in video or audio content; forms an initially estimated quantile value; and then modifies the estimated value in dependence upon a count of the results of comparisons between sample values within a fixed-length interval of the sequence of samples values and the estimated value to form an estimated quantile of the sequence of sample values. | 01-30-2014 |
20140086484 | IMAGE PROCESS WITH SPATIAL PERIODICITY MEASURE - An image manipulation process is controlled by a spatial periodicity measure formed for an image or an image block by measuring the sparseness of the two-dimensional spatial frequency spectrum of the image on a scale of zero to unity in which a two-dimensional spatial frequency spectrum having all equal values has a sparseness of zero and in which a two-dimensional spatial frequency spectrum having only one non-zero value has a sparseness of unity. Sparseness may be measured by allocating values of the spectrum to frequency bins and counting the number of bins that contain non-zero values; comparing values of the spectrum with a threshold and counting the number of values that exceed the threshold; or forming a function of the mean-square value and the mean value of the spectrum values. | 03-27-2014 |
20140301468 | VIDEO SEQUENCE PROCESSING OF PIXEL-TO-PIXEL DISSIMILARITY VALUES - A method of analysing an array of pixel-to-pixel dissimilarity values to identify a pixel which has a low pixel-to-pixel dissimilarity value and which has neighbouring pixels which have a low pixel-to-pixel dissimilarity value; the method comprising filtering the pixel-to-pixel dissimilarity values and varying the spatial extent of the filter aperture in dependence upon a picture spatial activity measure. | 10-09-2014 |
20140333832 | VIDEO PROCESSING USING A ONE-DIMENSIONAL CONTROL FUNCTION TO CONTROL COST AND ERROR - A video process is controlled through a one-dimensional control function to affect the two outcomes of processing cost and processing error. Points are generated in error/cost space corresponding to multiple combinations of parameter values applied to the process using reference input data. A subset of points is selecting in which each point is such that all other points in the space have either a higher error or a higher cost, to define the one-dimensional control function. | 11-13-2014 |
20140334547 | REFINING MOTION VECTORS IN VIDEO MOTION ESTIMATION - In video motion estimation an initial candidate motion vector is generated for each block and a vector error is determined as for example a DFD. Spatial gradients of pixel values are calculated and used to refine the initial candidate motion vector. The relative contribution of the spatial gradients to the refinement process depends on the vector error. | 11-13-2014 |
20150016743 | ENHANCING PERCEIVED SHARPNESS OF IMAGES - A method of enhancing the perceived sharpness of an image by controlling a spatial interpolation process. A pixel value spatial gradient measure is formed and used to generate a map of modified pixel positions. In this map, the pixel spacing is reduced when the gradient measure is high. By using this map of modified pixel positions to control an otherwise conventional interpolation process, an output image is formed having a perceived sharpness which is greater than that of the unmodified output of the interpolation process. | 01-15-2015 |