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 |
Patent application number | Description | Published |
20080199105 | Method and Apparatus for Spatial Interpolation of Colour Images - This invention concerns the spatial interpolation of colour images and, in particular, the reconstruction, or “de-mosaicing” of data from a single sensor-array electronic camera. Electronic cameras typically have an image sensor comprising a matrix of individual pixel sensors, each sensor being responsive to a colour component. In order to obtain colour component information for all pixels, in accordance with the disclosed embodiment, green component pixel values ( | 08-21-2008 |
20100045693 | PICTURE ATTRIBUTE ALLOCATION - The invention concerns image processing and, in particular, the processing of picture attribute fields for an image. A method of obtaining a new picture attribute field of an image is disclosed in which a picture attribute value at one position is allocated to a new position in the image in dependence upon the value of a parameter, such as luminance data, at the original position and at the new position and/or in dependence on the distance between the original position and the new position. The invention may be used to process picture attribute fields comprising: motion vectors; motion vector confidence; segment labels; depth labels; texture labels. | 02-25-2010 |
20100110298 | VIDEO TRANSMISSION CONSIDERING A REGION OF INTEREST IN THE IMAGE DATA - To enable efficient use of limited bandwidth in transmitting video, a region of interest is determined in each image. Before coding, the image is spatially scaled, with magnification applied inside that a region of interest. The scaled images are then compression encoded. Meta-data identifying the location of the region of interest accompanies the transmitted video so that, after decoding, the scaling can be reversed. | 05-06-2010 |
Patent application number | Description | Published |
20090153730 | METHOD AND APPARATUS FOR MODIFYING A MOVING IMAGE SEQUENCE - A moving image sequence is automatically reframed for a small display. The framing is adjusted in dependence upon foreground and background segment weights derived for pixels in images in the sequence. Reframed images are formed from only those input pixels which fall within a reframing window within the input image area and the position or size of the reframing window is adjusted so as to maximise a weighted total of the sum of the foreground weights of pixels within the window and the sum of the background weights of pixels outside the window. | 06-18-2009 |
20110229014 | ANALYSIS OF STEREOSCOPIC IMAGES - A method of identifying the left-eye and the right-eye images of a stereoscopic pair, comprising the steps of comparing the images to locate an occluded region visible in only one of the images; detecting image edges; and identifying a right-eye image where image edges are aligned with a left hand edge of an occluded region and identifying a left-eye image where more image edges are aligned with a right hand edge of an occluded region. | 09-22-2011 |
20110268179 | MOTION ESTIMATION WITH VARIABLE SPATIAL RESOLUTION - A motion estimator has a spatial sub-sampler to receive input images; at least one motion estimator determining motion vectors between input images and sub-sampled motion vectors between sub-sampled images; an up-sampler for up-sampling the sub-sampled motion vectors; and a selector for providing a motion vector output by selecting between the motion vectors and the (up-sampled) sub-sampled motion vectors, according to motion vector confidence. | 11-03-2011 |
20120287236 | VIDEO PROCESSING METHOD AND APPARATUS FOR USE WITH A SEQUENCE OF STEREOSCOPIC IMAGES - To generate a warning that a stereoscopic image sequence has been synthesised from a 2D image sequence, a video processor correlates left-eye image data and right-eye image data to identify any sustained temporal offset between the left-eye and right-eye image data. A measure of sustained correlation between a measured spatial distribution of horizontal disparity and a spatial model can also be used to generate the warning. | 11-15-2012 |
20120294486 | DETECTING STEREOSCOPIC IMAGES - To detect the presence of the left and right constituent images of a stereoscopic image packed within an image frame or within a sequence of image frames, images are unpacked according to each one of said known formats; a candidate measure is formed according to each unpacking and the candidate measures are compared to identify the presence of left and right images packed according to an identified format. The candidate measure may be a low pass filtered measure of the difference between the left and right images and may be a high pass filtered measure of the activity in either the left or the right image. | 11-22-2012 |