Image signal processing apparatus

Details Image signal processing apparatus Image signal processing apparatus

1993-10-19

1996-09-17

Rogers, Scott A.

Facsimile and static presentation processing

Natural color facsimile

Specific image-processing circuitry

358536, 358456, 358458, 358463, 382275, H04N 1405, H04N 1409, H04N 152, H04N 158

Patent

active

055574297

ABSTRACT:
An image signal processing apparatus for converting an image data signal input by an image input terminal into another image data signal suitable for an image output terminal. In the apparatus, a quantity of noise of a spatial frequency characteristic difficult to visually perceive is generated in accordance with a level of the input image data signal, and the noise generated is superposed on the input image data signal. In handling a color image data signal, the noise is superposed on the color image data signal in a regional color space difficult to visually perceive.

REFERENCES:
patent: 5225915 (1993-07-01), Ciccone et al.
S. Honjo, "Design of Hard Copy and Study on Analysis of Image Quality Thereof", Jul. 1991, corresponding to S. Honjo & S. Taguchi; Paper.
Summaries of the 5th Intern. Congr. on Advances in Non-Impact Printing Technologies (SPSE), pp. 196 (Nov. 1989 San Diego, Calif.).

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