Hardware aspects of algorithm generation
Bezier splines can be used to define the outlines of attractive fonts for high resolution laser printers. Pratt (1985) has shown how Pitteway’s conic drawing algorithm can be constrained to work with integers only, with the control of start and end points necessary to avoid bleeding from the seedfill of the outlines. Modern display devices cannot match the resolution of the printers, but many offer a grey-scale capability which can be used to improve the appearance of the edges bewteen lit and unlit regions. The conic drawing algorithm can be adapted for this purpose, while retaining integer control.
KeywordsSeed Fill Diagonal Move Quadrant Change Aliasing Problem Straight Line Boundary
Unable to display preview. Download preview PDF.
- V. Bruce and P. Green 1985 “Visual Perception -Physiology, Psychology and Ecology”, Lawrence Erlbaum Associates.Google Scholar
- P. Coueignoux 1985 “Character generation and display”, Fundamental Algorithms for Computer Graphics (Springer-Verlag NATO ASI Series F), volume 17, pages 361 thru’ 396.Google Scholar
- Peter Edwards 1986 “An investigation of anti-aliasing techniques for straight edges in motion using grey-scale to smooth the borders”, Master Dissertation, Brunei University.Google Scholar
- R.N. Haber and M. Hershenson 1973 “The psychology of Viual Perception”, Holt, Rinehart and Winston.Google Scholar
- N. Negroponte 1980 “Visual Communication and Interaction”, Methodology of Interaction -Seillac II, ed R.A. Guedj et al, (North Holland).Google Scholar
- N. Negroponte 1980 SID80 Digest, page 184.Google Scholar
- M.L.V. Pitteway 1981 “On filtering edges for grey-scale displays”, Computer Graphics (ACM SIGGRAPH), volume 15, pages 322 thru’ 326.Google Scholar
- M.L.V. Pitteway 1985 “Algorithms of conic generation”, Fundamental Algorithms for Computer Graphics (Springer-Verlag NATO ASI Series F), volume 17, pages 219 thru’ 237.Google Scholar
- Digital Typography Panel Meeting (unpublished).Google Scholar
- A.J. Wilkes and N.E. Wiseman 1982 “A soft-edged character set and its derivation”, Computer Journal, volume 25, pages 140 thru’ 147.Google Scholar