Spatial nonlinearities of gray-scale CRT pixels

Avi C. Naiman; Walter Makous

doi:10.1117/12.135955

27 August 1992 Spatial nonlinearities of gray-scale CRT pixels

Avi C. Naiman, Walter Makous

Proceedings Volume 1666, Human Vision, Visual Processing, and Digital Display III; (1992) https://doi.org/10.1117/12.135955
Event: SPIE/IS&T 1992 Symposium on Electronic Imaging: Science and Technology, 1992, San Jose, CA, United States

Abstract

We measured the overall luminance, the luminance profile of individual pixels, and the interactions among neighboring pixels of a grayscale (i.e., non-color) CRT, using a two- dimensional CCD camera. We find that the luminance of a pixel depends on the luminance of the two preceding pixels in the raster, and that the interaction results in superadditivity. Furthermore, the luminance of a pixel depends on the proportion of the screen illuminated. Two consequences of these nonlinearities are that average luminance (as in a halftone image) cannot be predicted from the linear summation of individual pixel spread functions, and that inverting the polarity of a display does not simply invert the luminance profiles. These interactions must be taken into account wherever the luminance profile of displayed stimuli is important.

Citation Download Citation

Avi C. Naiman and Walter Makous "Spatial nonlinearities of gray-scale CRT pixels", Proc. SPIE 1666, Human Vision, Visual Processing, and Digital Display III, (27 August 1992); https://doi.org/10.1117/12.135955

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