| 摘要 |
<p>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).</p> |
