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An image/video communication scenario with super-resolution (SR) decoding, where the decoded images are upsampled using SR reconstruction at the receiver side, is analyzed from a theoretical perspective. To formulate the rate-distortion performance for such cases, we propose a new numerical model that combines a frequency-domain SR model and a rate-distortion theory for lossy image compression. We...
A new model of decomposing an image hierarchically into direction-adaptive subbands using pixel-wise direction estimation is presented. For each decomposing operation, an input image is divided into two parts: a base image subsampled from the input image and subband components. The subband components consist of residuals of estimating the pixels skipped through the subsampling, which ensures the invertibility...
This paper discusses a system in which multi-view images are captured and encoded in a distributed fashion and a viewer synthesizes a novel view from this data. We developed an efficient method for such system that combines decoding and rendering process to directly synthesize the novel image without reconstructing all the input images. Our method jointly performs disparity compensation in decoding...
This paper proposes a view-dependent light field coding scheme using some image-based rendering techniques prior to coding. The proposed coder first synthesizes an image at a given viewpoint, which is called a representative viewpoint, and then predicts all input images by using the synthesized image as a reference. It can produce a view-dependent scalable bitstream. This means that the quality of...
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