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扫描仪作为一种普及型的图形图像输入设备,目前在各广告公司、出版社、输出中心、乃至个人用户中,都得到非常广泛的应用。但是,扫描仪品牌繁多,档次良莠不齐,那么您现有的扫描仪到底能做什么,不能做什么,如何使之最大限度地发挥其功能呢? 在国内目前常用的扫描仪无非是以下两大类型。滚筒扫描仪和平面扫描仪。滚筒扫描仪采用光电倍增管（PMT）作为传感器,具有极高的扫描精度,但是其高昂的价格,使其难以推广普及。另一种是目前大量使用的平面扫描仪,它采用电荷耦合器件（CCD）作为传感器,由于CCD设计的不同,不同品牌不同价格的平面扫描仪差别很大,衡量平面扫描仪的质量包括:光学分辨率、密度范围、位深、黑白场平衡等等诸多因素。其中,扫描分辩率的设定是人为控制扫描质量的一个重要参数。
As a universal type of graphic image input device, scanners are widely used in various advertising agencies, publishing houses, output centers and even individual users. However, the scanner brand variety, quality varies greatly, then your existing scanner in the end can do what, what can not be done, how to make it to maximize its function? At present, the scanner is commonly used in the following two major types . Roller scanners and flatbed scanners. The drum scanner uses a photomultiplier tube (PMT) as a sensor with extremely high scanning accuracy, but its high price makes it difficult to popularize. The other is currently widely used plane scanner, which uses charge-coupled device (CCD) as a sensor, due to the different CCD design, different brands of flat-panel scanners vary widely, the quality of the measurement plane scanner include: optical Resolution, density range, bit depth, black and white field balance and many other factors. Among them, the setting of the scanning resolution is an important parameter for artificially controlling the scanning quality.