کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
529903 | 869721 | 2012 | 15 صفحه PDF | دانلود رایگان |
Grayscale digital halftoning produces bi-level representation of original continuous tone images. This process plays pivotal role for devices like printers, plasma panels, LCD displays, etc. The bi-level images can be considered as binary images where ‘0’ and ‘1’ correspond to black and white, respectively. This paper investigates potential of binary particle swarm optimization (BPSO) to generate faithful binary halftone patterns. The cost function addresses important characteristics of original images and pleasant visual appearance of halftone images. The paper also shows the application of pattern look-up-table (p-LUT) approach to address the high processing time of BPSO optimization and simple gradient-based edge enhancement for improved edge retention. Results are evaluated subjectively by statistical measures and psychovisual test. Results are evaluated objectively using image quality evaluation metrics as well. The comparisons with state-of-the-art techniques are also drawn. The evaluation results along with the comparisons show the competitive potential of the presented technique.
► Human visual system based cost function proposed for halftone binary patterns.
► Binary particle swarm optimization used to generate optimized binary patterns.
► Pattern look-up-table (p-LUT) approach is employed with edge enhancement technique for halftones.
Journal: Journal of Visual Communication and Image Representation - Volume 23, Issue 8, November 2012, Pages 1245–1259