Title :
Design and visual evaluation of digital filters for enlargement and reduction of images
Author :
Murakawa, Jun ; Nishihar, Akinori
Author_Institution :
Center for Res. & Dev. of Educ. Technol., Tokyo Inst. of Technol., Japan
Abstract :
Linear-phase FIR digital filter responses used in resizing of images are investigated and evaluated both objectively and subjectively. Blur, jaggy and ringing are the main artifacts which deteriorate image quality. A new type of filter response which incorporates characteristics of human visual systems and statistical property of images are found to show good visual quality even with lower filter order, which was supported by objective and subjective evaluation of images
Keywords :
FIR filters; image enhancement; interpolation; linear phase filters; blur; enlargement; filter order; filter response; human visual systems; image quality; jaggy; linear-phase FIR digital filter responses; objective evaluation; reduction; resizing; ringing; statistical property; subjective evaluation; visual evaluation; visual quality; Band pass filters; Chebyshev approximation; Digital filters; Electronic mail; Finite impulse response filter; Frequency; Image quality; Interpolation; Research and development; Visual system;
Conference_Titel :
Circuits and Systems, 2000. IEEE APCCAS 2000. The 2000 IEEE Asia-Pacific Conference on
Conference_Location :
Tianjin
Print_ISBN :
0-7803-6253-5
DOI :
10.1109/APCCAS.2000.913423
