Sampling and Reconstruction
Analog images must be sampled before being represented on the computer. In order to be visualized they must be displayed on a device that is able to reconstruct color, such as a CRT monitor. The sampling process is called rasterization; it is carried out by some sampling device, such as a scanner or TV camera, or by discretizing a continuous mathematical description of a scene, as in the case of the rendering process of image synthesis systems. The display device reconstructs the discrete image, creating an optical-electronic version that is perceived by the eye. Thus, an understanding of sampling and reconstruction is a good foundation for producing good-quality images.
KeywordsOriginal Signal Reconstruction Process Reconstructed Signal Reconstruction Problem Reconstruction Filter
Unable to display preview. Download preview PDF.
- Amidor, J. P. (1991). The moiré phenomenon in color separation. In Raster Imaging and Digital Typography II, Proceedings of the 2nd Intl. Conf Raster Imaging and Digital Typography, Vol. 6, 96–119.Google Scholar
- Amidor, J. P., Hersch, R., and Ostromoukhov, V. (1994). Spectral analysis and minimization of moiré patterns in color separation. J Electronic Imaging, 3 (3): 295–317.Google Scholar
- Dubois, E. (1985). The sampling and reconstruction of time-varying imagery with application in video systems. Proceedings of the IEEE, 73 (4).Google Scholar
- Glassner, A. (1995). Principles of Digital Image Synthesis, vol. 2. Morgan Kaufmann Publishers, Inc. San Francisco.Google Scholar
- Gomes, J., Costa, B., Darsa, L., and Velho, L. (1996). Graphical objects. The Visual Computer 12 (6): 269.Google Scholar
- Heckbert, P. S. (1989). Fundamentals of Texture Mapping and Image Warping Master’s thesis, Dept. of Electrical Engineering and Computer Science, University of California, Berkeley.Google Scholar
- Jain, A. K. (1989). Fundamentals of Digital Image Processing. Prentice-Hall, Englewood Cliffs, NJ.Google Scholar
- Mertz, P. and Grey, F. (1934). A theory of scanning and its relation to the characteristics of the transmitted signal in telephotography and television. Bell System Tech. J. 13: 464–515.Google Scholar
- SIGGRAPH (1996). Warping and morphing of graphical objects. ’96 Course Notes ACM/SIGGRAPH. Also available on CD-ROM.Google Scholar
- Wolberg, G. (1990). Digital Image Warping. IEEE Computer Society Press, Los Alamitos, CA.Google Scholar