Spatial Warping Experiments With A Precision CRT Display

D. Wells; L. Paffrath; H. Mery; J. Cover

doi:10.1117/12.955718

8 December 1977 Spatial Warping Experiments With A Precision CRT Display

D. Wells, L. Paffrath, H. Mery, J. Cover

Proceedings Volume 0119, Applications of Digital Image Processing; (1977) https://doi.org/10.1117/12.955718
Event: 21st Annual Technical Symposium, 1977, San Diego, United States

Abstract

We have recently assembled a precision CRT display system which uses 16-bit digital-to-analog converters to control its x and y deflections. We have used this hardware to perform spatial warping experiments with digital images in which the desired locations of the pixels are computed according to the warp functions. For moderately distorted images, the cosmetic defects in imagery produced by this process may be acceptable in some of our applications. We show that the polynomials describing the warping functions can be efficiently evaluated by finite difference tables. We discuss the design of microprogrammed controllers, which can calculate the warped coordinates at the same rate that the CRT beam exposes the film by using difference tables.

Citation Download Citation

D. Wells, L. Paffrath, H. Mery, and J. Cover "Spatial Warping Experiments With A Precision CRT Display", Proc. SPIE 0119, Applications of Digital Image Processing, (8 December 1977); https://doi.org/10.1117/12.955718

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