The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 20, 1995
Filed:
Mar. 09, 1992
Alain Couturier, Les Essards Le Roi, FR;
Thomson - CSF, Puteaux, FR;
Abstract
In order to improve the contrast of a synthetic image generator, the usually implemented operations of luminance compression are eliminated. Instead, a computation of true luminosity is made and the function of adaptation of the eye is included by computing the true output light energy. Then, the video components of the signal are sent to a display system and are standardized as a function of the light energy of the image displayed and the possible range of the image display. The method includes producing images with a luminance range substantially equal to the true luminance range of an eye and sending this signal to the display system. The signal is varied for different images at a time equal to the time an eye adjusts to different images. The apparatus includes a main channel being corrected by a computing circuit, having a peak luminance extraction circuit and a light energy computing circuit for generating a luminance correction signal.