| 摘要 |
Method for calibrating an image detector comprising sources (10) for illuminating a document (3) and photosensitive elements (16) for receiving the light reflected by the document, means (7) for compensating the output voltage of each photosensitive element (16), and means for varying the intensity of the light signal emitted by the associated source (10). It consists in presenting a white reference document to the image detector and, after having equalised the gains of the compensation means, in raising the intensity of the light of the sources until all the photosensitive elements (16) have bright responses, in increasing the attenuation with the aid of the compensation means (7) until the corresponding photosensitive element (16) again has a dark response, and in storing this attenuation to form a correction table (21). <IMAGE> |
