| 摘要 |
An image-based document processing system includes an imaging camera which is disposed along one side of a document transport path. The imaging camera has an acquisition rate associated therewith. A selective illumination array is disposed along the document transport path and generates selective illumination data which is synchronized to the acquisition rate of the imaging camera. A controller is provided for (i) controlling the imaging camera to capture an image of the document as the document is being transported past the imaging camera, and (ii) controlling the imaging camera to capture an image of selective illumination data. The imaging camera may include a charge-coupled device (CCD) having a linear array of sensors. The imaging camera may capture the image of selective illumination data either after the image of the document is captured or before the image of the document is captured. Alternatively, the imaging camera may capture the image of selective illumination data while the image of the document is being captured to provide a composite image of the document and selective illumination data. The selective illumination array may provide light which is transmitted directly towards the imaging camera. Alternatively, the selective illumination array may provide light which is reflected and then transmitted towards the imaging camera. |
