Color original evaluating method

Details Color original evaluating method Color original evaluating method

1981-07-02

1983-08-02

Richardson, Robert L.

Facsimile and static presentation processing

Static presentation processing

Attribute control

HO4N 9535, HO4N 300

Patent

active

043969402

ABSTRACT:
In a color original evaluating method, the image of a printing color original is projected, as a two-valued image at a set slice level, onto the screen of a monitor, the slice level is changed to select a region proposed for a highlight set point as a color separation condition from the area and position of the white portion of the color original. Slice levels are obtained for red, green and blue with the areas of white portions in the use of red, green and blue filters being in an allowable limit, and are employed as reference densities at highlight set points of these colors, respectively, and a density distribution in the use of an ND filter and density accumulation curve are obtained to evaluate the color original.

REFERENCES:
patent: 4158859 (1979-06-01), Kerbel
Photogrammetric Engineering, vol. 40, No. 2, pp. 199-202, Feb. 1974.

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