Compositing. 1. Theory
- 1 September 1994
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Computer Graphics and Applications
- Vol. 14 (5) , 83-87
- https://doi.org/10.1109/38.310740
Abstract
Associating a pixel's color with its opacity is the basis for a compositing function that is simple, elegant, and general. However, there are more reasons than mere prettiness to store pixels this way. One of the most important anti-aliening tools in computer graphics comes from a generalization of the simple act of storing a pixel into a frame buffer. Several people simultaneously discovered the usefulness of this operation, so it goes by several names: matting, image compositing, alpha blending, overlaying, or lerping. It was most completely codified in a previous paper by Porter and Duff (1984), where they call it the over operator. The author shows a new way to derive the over operator and describes some implementation details that he has found useful.Keywords
This publication has 2 references indexed in Scilit:
- Compositing digital imagesACM SIGGRAPH Computer Graphics, 1984
- Light reflection functions for simulation of clouds and dusty surfacesACM SIGGRAPH Computer Graphics, 1982