CumInCAD is a Cumulative Index about publications in Computer Aided Architectural Design
supported by the sibling associations ACADIA, CAADRIA, eCAADe, SIGraDi, ASCAAD and CAAD futures

PDF papers
authors Salesin, David and Barzel, Ronen
year 1986
title Two-Bit Graphics
source IEEE Computer Graphics and Applications. June, 1986. vol. 6: pp. 36-42 : ill. includes bibliography
summary Ordinary bitmaps allow pixels to be black or white. The authors introduce a second bitmap, the 'alpha' bitmap, which allows pixels to be transparent as well. The alpha bitmap makes it possible to have black-and-white images that are nonrectangular or that have holes in them. It also provides a richer set of operations for working with bitmaps. The article presents the mathematics for a two-bit compositing algebra, and suggest extensions for two-bit compositing, painting, and region filling. Each of these operations can be implemented with ordinary bitbits and presented on ordinary bitmap displays. The authors analyze the cost of each two-bit operation in terms of the number of bitbits it requires
keywords computer graphics, algorithms, display
series CADline
references Content-type: text/plain
last changed 2003/06/02 11:58
pick and add to favorite papersHOMELOGIN (you are user _anon_610530 from group guest) CUMINCAD Papers Powered by SciX Open Publishing Services 1.002