Title :
Concealment of damaged blocks by neighborhood regions partitioned matching
Author :
Wong, William Y F ; Cheng, Angus K Y ; Ip, Horace H S
Author_Institution :
Dept. of Comput. Sci., City Univ. of Hong Kong, Kowloon, China
Abstract :
This paper presents a new error concealment algorithm for the masking of damaged blocks due to data loss during the transmission of DCT based images over a packet network. The algorithm is called neighborhood regions partitioned matching (NRPM). Instead of repairing damaged block as a whole, each damaged block is divided into a number of sub-blocks. Each sub-block is recovered utilizing not only the surrounding pixels, but also remote pixels which share similar local image characteristics. The approach yields good a quality repair and since smaller block size is used, it can significantly reduce the computational time for the reconstruction process
Keywords :
discrete cosine transforms; error correction; image matching; image restoration; image segmentation; transform coding; DCT based images; damaged block concealment; error concealment algorithm; image characteristics; image matching; image reconstruction; image restoration; image segmentation; neighborhood regions partitioned matching; packet network; Frequency; IP networks; Image coding; Image edge detection; Image restoration; Interpolation; Partitioning algorithms; Pixel; Propagation losses; Video compression;
Conference_Titel :
Image Processing, 2001. Proceedings. 2001 International Conference on
Conference_Location :
Thessaloniki
Print_ISBN :
0-7803-6725-1
DOI :
10.1109/ICIP.2001.958420
