Method for video-to-printing image resolution conversion

Details Method for video-to-printing image resolution conversion Method for video-to-printing image resolution conversion

1990-02-12

1992-07-14

Razavi, Michael

Image analysis

Histogram processing

For setting a threshold

382 54, 358166, G06K 940, G06K 944

Patent

active

051310570

ABSTRACT:
A method of improving image resolution by interpolation combines the concept of convolution with a parameter-controlled mask, with the concept of adjustment of the mask based on edge information. In the method, first the edge information is extracted from the original image data, and then interpolated to the size to which the original image data will be interpolated. With the guidance of the interpolated edge information, the interpolation process will produce an image with high contrast but minimal artifacts. A spline-under-tension function is applied to generate interpolated values, the function being modified for image data points located close to edges.

REFERENCES:
patent: 4783840 (1988-11-01), Song
patent: 4789933 (1988-12-01), Chen et al.
patent: 4849914 (1989-07-01), Medioni et al.
Smith & Davis, "A new Algorithm for Edge Detection," Jun. 10, 1974, pp. 55-61.
Miyake et al., "A New Interpolation Algorithm of Television Pictures for Compact Printing System," SPSE's 40th Annual Conference and Symposium on Hybrid Imaging Systems, pp. 17-20 (1987).
Tzou et al., "Subjectively Adapted Interpolation," Electronic Imaging '86, pp. 144-148 (1986).
Pokorny et al., Computer Graphics: The Principles Behind Art and Science, pp. 260-262 (Franklin, Beedle and Assoc. 1989).
Marr, Vision, pp. 54-61 (W. H. Freeman and Co. 1982).

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