Title :
Iterative error diffusion halftoning using a zero phase error filter
Author :
Makur, Anamitra ; Kumar, Akhil
Author_Institution :
Dept. of Electr. Commun. Eng., Indian Inst. of Sci., Bangalore, India
Abstract :
The halftone quality of an error diffusion halftone depends on the error filter response. Apart form the magnitude response being a low pass, it is desirable to have a zero phase response. We propose the iterative error diffusion halftoning algorithm that allows use of non-causal error filter (such as zero phase error filter). We present simulation results showing that the proposed halftoning scheme is substantially better, specially in retaining the sharpness of the edges and in truthfullness
Keywords :
error analysis; filtering theory; image processing; iterative methods; low-pass filters; error filter response; halftone quality; iterative error diffusion halftoning algorithm; low pass magnitude response; noncausal error filter; simulation results; zero phase error filter; zero phase response; Convolution; Digital images; Finite impulse response filter; Fourier transforms; Frequency; Image recognition; Iterative algorithms; Low pass filters; Quantization; Virtual manufacturing;
Conference_Titel :
Image Processing, 1997. Proceedings., International Conference on
Conference_Location :
Santa Barbara, CA
Print_ISBN :
0-8186-8183-7
DOI :
10.1109/ICIP.1997.648083