B. Shen and I. K. Sethi, "Convolution-based edge detection for image/video in block DCT domain," Journal of Visual Communications and Image Representation, Vol. 7, No. 4, pp. 411-423, Dec. 1996. Home/Search Document Details and Download
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.... The result is coarse edge segments that can be used for video indexing tasks like shot boundary detection based on the change ratio of edge maps [67] They also investigate convolution based edge detection in compressed images by merging symmetric kernel convolution with the IDCT procedures [48]. Compared with conventional convolution based edge detection, a speedup of 3 to 10 times is achieved with comparable results. However, large convolution kernels (e.g. 17 x 17 pixels) are necessary to reduce the artifacts introduced by JPEG and MPEG compression schemes. Therefore, this method ....
B. Shen and I. K. Sethi, "Convolution-based edge detection for image/video in block DCT domain," Journal of Visual Communications and Image Representation, Vol. 7, No. 4, pp. 411-423, Dec. 1996.
Closed-Loop MPEG Video Rendering - Shen, Sethi, Bhaskaran Self-citation (Shen Sethi) (Correct)
....blocks in PDM fashion [9] block wise operations or in other words, block invariant operations, are definitely preferable in the sense that the operation on each pixel of the block are the same. Thus, the DCT domain equivalent of the spatial domain operation can be easily derived [2] 6] [4]. If the operation is a pixel wise operation, additional operations will be needed for the extraction of the corresponding DCT component (or components) This is not usually possible or at least not cost efficient if we want to avoid IDCT. However, some of the spatial domain operations such as ....
Bo Shen and Ishwar K. Sethi, "Convolution-based edge detection for image/video in block DCT domain," Journal of Visual Communications and Image Representation, Dec. 1996.
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B. Shen, I. Sethi, Convolution-Based Edge Detection for Image/Video in Block DCT Domain, Journal of Visual Communication and Image Representation, Vol. 7, No. 4, pp. 411-423, 1996.
A Fast Algorithm for Reconstructing Motion Compensated Blocks in.. - Li, Shi (Correct)
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B. Shen and I. K. Sethi. Convolution-based edge detection for image/video in block-DCT domain. Journal of Visual Communications and Image Representation, 7(4):411--423, December 1996.
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