| 摘要 |
The present invention improves the scanning speed (i.e., the line exposure time) of an image scanner that is operated at a lower than normal resolution. The image scanner contains a charge coupled device (CCD) that stores a plurality of pixel charges. Before digitizing the pixel charges, the present invention combines two or more of these pixel charges. Thus, the effective resolution of the CCD can be divided by a designated amount, thus reducing processing time and keeping signal levels nearly constant.
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