Patent
Method and apparatus for compressing and decompressing a video image
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TLDR
In this article, two separate filters (302, 304) are used to detect edge information, one of the filters detects sharp edges, or edges in which the discontinuity in pixel intensity values occurs over a range of a few pixels.Abstract:
Edge or contour information is extracted from an image array by filtering and encoded. In order to improve reproduction accuracy, two separate filters (302, 304) are used to detect edge information. One of the filters detects 'sharp' edges, or edges in which the discontinuity in pixel intensity values occurs over a range of a few pixels. The other filter detects 'level' edges in which the pixel intensity value discontinuity occurs over a larger range of pixels than the 'sharp' edges. The 'smooth' areas between edges or contours are assumed to vary continuously between the contours, but for efficient implementation, a one-dimensional linear interpolation (216) is used to regenerate the contour information between edges. In addition, to further improve performance, a line is fitted to the pixel intensity data. The end values of this line are then used for the pixel intensity data. In order to still further improve performance, the pixel intensity values associated with each contour are divided into groups and each group is then encoded. Another improvement is accomplished by mean coding the residual error.read more
Citations
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TL;DR: In this article, the authors proposed a system and method for adding hyperlinked information to television broadcast system, which includes a video source providing video information and an annotation system, and an augmented video information transmission generator that receives the annotation data, the video information, and annotation data timing information.
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Xavier Michel,Koji Aoyama +1 more
TL;DR: An image processing apparatus includes an edge detector that detects an edge direction in an original image; a confidence detector that detected a confidence of the edge direction; a contrast detector that detect a contrast intensity; a texture-contrast-weight setter that sets a texture contrast weight; an edge contrast weight setter, which is used to set an edge weight; and an edge combiner that combines the texture-combination image and the edge filter image to generate an edge-combining image as discussed by the authors.
References
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