Title :
Picture enhancement in video and block-coded image sequences
Author :
Scognamiglio, G. ; Rizzi, A. ; Albani, L. ; Ramponi, G.
Author_Institution :
Dipt. di Elettrotecnica, Elettronica ed Inf., Trieste Univ., Italy
Abstract :
We propose a sharpness enhancement technique for video and decoded image sequences. A non-linear function generates a correction signal that is added to the luminance edges. Spatio-temporal information is used to enhance details, avoiding blocking artefacts and noise.
Keywords :
brightness; decoding; filtering theory; high-pass filters; image enhancement; image sequences; low-pass filters; nonlinear functions; video coding; block-coded image sequences; blocking artefacts avoidance; correction signal; decoded image sequences; luminance edges; noise avoidance; non-linear contrast enhancement; nonlinear function; nonlinear high-pass filter; picture enhancement; quasilinear low-pass filter; sharpness enhancement; spatio-temporal information; video coded image sequences; 1f noise; Decoding; Filtering; IIR filters; Image sequences; Laplace equations; Noise reduction; Personal communication networks; Signal generators; TV;
Conference_Titel :
Consumer Electronics, 1999. ICCE. International Conference on
Conference_Location :
Los Angeles, CA, USA
Print_ISBN :
0-7803-5123-1
DOI :
10.1109/ICCE.1999.785290
