Patent application number | Description | Published |
20090003457 | Inverse Tone Mapping for Bit-Depth Scalable Image Coding - A method performs inverse tone mapping of an image in a decoder. For each block of each color channel of the image the following steps are performed. A scaling factor is determined for a current block of the image by adding a predicted scaling factor for the current block to a difference between the predicted scaling factor and the scaling factor of an adjacent block. An offset value for the current block is determined by adding a predicted offset for the current block to a difference between the predicted offset value and the offset value of the adjacent block. The scaling factor and the offset value are applied to pixel intensity values of the current block to produce a mapped block in which a bit-depth of the mapped block is greater than the bit-depth of the current block. | 01-01-2009 |
20110206288 | IMAGE ENCODING/DECODING SYSTEM USING GRAPH BASED PIXEL PREDICTION AND ENCODING SYSTEM AND METHOD - Provided are an image encoding/decoding system and method using a graph-based pixel prediction, and a depth map encoding system and method. The encoding system may generate an edge map based on a pixel value difference between neighboring pixels in an inputted image, generate a graph by connecting pixels using the generated edge map, select a prediction value for at least one pixel based on the generated graph, and encode an image based on the selected prediction value. | 08-25-2011 |
20110292043 | Depth Map Coding to Reduce Rendered Distortion - Several implementations relate to depth map coding. In one implementation, a depth coding rate, that results from coding one or more portions of a depth map using a particular coding mode, is determined. The depth map can be used to render video for a different view than that of the depth map. A depth map distortion, that results from coding the one or more portions of the depth map using the particular coding mode, is determined. A value of distortion for the rendered video, based on the depth map distortion and on a particular relationship between the depth map distortion and values of distortion for the rendered video, is determined. It is determined whether to use the particular coding mode to code the one or more portions of the depth map, and the determination is based on the value of distortion for the rendered video and the depth coding rate. | 12-01-2011 |
20110292044 | DEPTH MAP CODING USING VIDEO INFORMATION - Several implementations relate to depth map coding. In one implementation, it is determined that differences between collocated video blocks are small enough to be interchanged. Based on that determination, a depth block corresponding to a first of the video blocks is coded using an indicator that instructs a decoder to use a collocated depth block, corresponding to a second of the video blocks, in place of the depth block. In another implementation, a video signal includes a coding of at least a single indicator that instructs a decoder to decode both a depth block and a corresponding video block using collocated blocks, from other pictures, in place of the depth block and the corresponding video block. In another implementation, the depth block and the corresponding video block are decoded, based on the single indicator, using the collocated blocks in place of the depth block and the corresponding video block. | 12-01-2011 |
20120140819 | DEPTH MAP CODING - Various implementations relate to depth map coding. In one method, a depth coding rate and depth distortion are determined for a coding mode. Based on the value of depth distortion, a correlation coefficient is determined between at least a portion of a video picture and a translated version of the video picture. The video picture is one or more of a video picture corresponding to the depth being coded, or a rendered video picture for a different view. A video distortion is determined based on the correlation coefficient, and is used to evaluate the coding mode. Another implementation determines a multiplier, to be used in a rate-distortion cost, based on pixel values from one or more of a video picture from a particular view or a rendered video picture for a different view. | 06-07-2012 |
20120188234 | IMAGE PROCESSING APPARATUS AND METHOD - Provided is an image processing apparatus. The image processing apparatus may synthesize an image observed at a target view excluding a reference view. A decoder of the image processing apparatus may decode depth transition data. A first map generator of the image processing apparatus may generate a foreground and background map of a target view to render an image, based on the decoded depth transition data. A rendering unit of the image processing apparatus may determine a color value of each of pixels constituting the image by comparing the foreground and background map of the target view with a foreground and background map of at least one reference view. | 07-26-2012 |
20130272422 | SYSTEM AND METHOD FOR ENCODING/DECODING VIDEOS USING EDGE-ADAPTIVE TRANSFORM - A system and method for encoding/decoding videos using an edge-adaptive transform. The encoding system encodes input videos using the edge-adaptive transform or, alternatively, using either the edge-adaptive transform or a discrete cosine transform. | 10-17-2013 |
20140002596 | 3D VIDEO ENCODING/DECODING APPARATUS AND 3D VIDEO ENCODING/DECODING METHOD USING DEPTH TRANSITION DATA | 01-02-2014 |