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Post‐transmission digital video enhancement for people with visual impairments
Author(s) -
Fullerton Matthew,
Peli Eli
Publication year - 2006
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1889/1.2166829
Subject(s) - computer science , coding (social sciences) , computer vision , decoding methods , video quality , artificial intelligence , contrast (vision) , video processing , subjective video quality , transmission (telecommunications) , image quality , multimedia , image (mathematics) , algorithm , telecommunications , metric (unit) , statistics , operations management , mathematics , economics
— Image enhancement has been shown to improve the perceived quality of images and video for people with visual impairments. The MPEG coding scheme makes spatial filtering, likely to help those with such impairments, possible at the decoding stage. A real‐time platform was implemented for testing and improving contrast‐enhancement algorithms for MPEG video, with controls appropriate for the target population. The necessary additional processing runs efficiently on a general‐purpose PC and can be integrated easily into existing MPEG‐2 decoders. The system has enabled substantial improvement over the previous filtering algorithm; reducing artifacts exhibited in the previous implementation and facilitating individual user selection of enhancement parameters in evaluation studies.