Title :
Gradient-based block truncation coding
Author :
Quweider, M.K. ; Salari, E.
Author_Institution :
Dept. of Electr. Eng., Toledo Univ., OH
fDate :
3/2/1995 12:00:00 AM
Abstract :
A new gradient-based block truncation coding (BTC) algorithm is presented. Combined with a simple two-way classification, the algorithm shows a substantial improvement in the visual image quality demonstrated by edge preservation and reduction of the staircase effect. At the same time, significant reduction in bit rate is achieved. A user-defined threshold allows bit rates in the range 0.70-1.5, depending on the quality level desired
Keywords :
block codes; digital simulation; edge detection; image coding; bit rate; edge preservation; gradient-based block truncation coding; image coding; staircase effect reduction; two-way classification; user-defined threshold; visual image quality;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19950268
