H - Electricity – 04 – N
Patent
H - Electricity
04
N
H04N 5/32 (2006.01) A61B 6/14 (2006.01) H04N 5/217 (2006.01) H05G 1/60 (2006.01)
Patent
CA 2134875
2134875 9323952 PCTABS00028 The present method and device according to the invention is by a compensation signal to guarantee that picture element within preferably faintly exposed image areas in dental x-raying will be located within a desired signal level interval, which on a video monitor (25) is corresponding to the light intensity which should have been obtained with a dental x-ray film, to thereby on the video monitor (25) facilitate improved dynamics and thus obtain maximum imaging sensitivity for gray level variations, e.g., enamel and dentine in dental x-raying. Additionally is achieved that the strong dependence of the image sensor to, e.g., ambient temperature regarding its dark current is compensated by a signal processing device (20, 23) already upon generation of raw data for the image to thus utilize maximum possible image quality and resolution prior to subsequent processing by a processor (22) by means of a non-linear digitalization (21).
Afp Imaging Corporation
Ridout & Maybee Llp
LandOfFree
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