초록 ▼

The invention relates to a method and device used for the digital detection of transparent and opaque documents, comprising a CCD pick-up element, a document holder, an illuminating device and elements for covering the edges (masking unit) of the documents. The method comprises the following steps:

The invention relates to a method and device used for the digital detection of transparent and opaque documents, comprising a CCD pick-up element, a document holder, an illuminating device and elements for covering the edges (masking unit) of the documents. The method comprises the following steps: a) placing the document on the document holder; b) determining the size of the document; c) automatically adjusting a zoom objective, assigned to the scanner, in relation to the document; d) automatically adjusting the masking to the document size; e) beginning the exposure process; f) automatically adjusting the illumination by determining the dynamic range of the image intensity; g) exposing the CCD chip in the camera (one shot); h) memorizing the digitized data in a PC memory; i) further processing the memorized data in the PC or in an external data processing installation.

대표청구항 ▼

1. The device for the digital detection of both transparent and opaque documents, with a CCD pick-up element, a document holder, an illuminating device, and with elements for covering the edges of the documents, characterized in that the pick-up element is a CCD-camera equipped with a motor-driven z

1. The device for the digital detection of both transparent and opaque documents, with a CCD pick-up element, a document holder, an illuminating device, and with elements for covering the edges of the documents, characterized in that the pick-up element is a CCD-camera equipped with a motor-driven zoom lens with automatic focusing; that the masking unit is arranged below the document holder between the document holder and the camera, said masking unit consisting of four motor-adjustable opaque roller shades, said roller shades being arranged in pairs opposing each other and being synchronously adjustable relative to one another; and that the drive of the zoom lens and the drive of the masking unit are controllable in coordination with each other via a software.