Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1990-02-06
1992-10-13
Boudreau, Leo H.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358 75, 340703, H04N 146
Patent
active
051555883
ABSTRACT:
Tone values of a photographic image are stored in a frame store and retrieved from the frame store to produce a corresponding video display. A mouse or trackball is used to locate a point on display and a gamma correction curve look up table is used to interactively show the effect of color correction. Adjustment can be made via lighter and darker switches on the mouse or trackball. These switches subtract or add a bump function to the gamma correction curve in the selected color density plane. The bump function is displaced by the measured tone value in order to achieve more flexible control over the color correction.
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Boudreau Leo H.
Fox David
Jacobson Allan J.
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