The most important thing about the book scanner is the sensor. Currently, the sensors on the market are divided into matrix ccd and linear ccd sensors, and there are cmos. The average customer will choose the matrix ccd point-to-point scanning technology. Why do you say this? Let's take a closer look at it.
The aerospace-class matrix CCD is a new generation of CCD processor products that combines the advantages and features of a new generation of CCD technology and back-illuminated CMOS. He continued the advantages of simple design, high sensitivity, excellent image quality and mature technology of CCD sensor, and also solved the problem of slow processing speed of linear ccd image; collecting the noise of output image line by line, and making the durability of ccd greatly Upgrade. The stability of the processor under high-intensity use is guaranteed. Although the production of matrix CCD is still difficult to solve the problem of low price and high price. However, it is the matrix CCD technology that combines the biggest advantages of CCD and CMOS design, which makes him more flexible in product design. That is to say, if one day CMOS technology can perfectly replace CCD technology, only the cross-platform design of matrix CCD technology can be upgraded seamlessly. However, the old linear CCD products can only be completely eliminated.
With the commercialization of industrial-grade high-end CCDs, a space-grade full-frame true color matrix CCD is used to make scanners. This new design greatly increases the scanner's scanning speed (A2 400dpi color 0.3 seconds), which is three times faster than traditional linear ccd book scanners and RGB monochrome matrix scanners. The true color matrix book scanner is a one-time point-to-point scan imaging that makes the overall restoration of the scanned image better and achieves zero distortion of the image. Moreover, the true color matrix scanning one-time point-to-point scanning method does not need to move the progressive (multiple) scanning like the linear or RGB monochrome matrix scanner, which reduces the transmission mechanism and greatly increases the durability of the book scanner. It also reduces the light pollution of linear scanning equipment and reduces the damage of precious materials in the digitization process. The life of the matrix CCD is more than 300 million pages, which is more suitable for a large number of ancient books.
The space-grade matrix CCD sensor assembly uses a planar CCD consisting of very small pixels. His collection method is a point-to-point true color one-time acquisition.
The aerospace-grade true color matrix CCD sensor can convert a single pixel optical signal on the surface of the original into an electrical signal, and the acquisition speed is instantaneously completed. It is usually only 0.3 seconds to scan the A2 full color image at 600 dpi with high precision. Because image acquisition is done in one shot at a time, image acquisition color reproduction is better, especially in the collection of special color media (such as gold, silver), these color linear ccd can not be collected. And the true color matrix ccd can perform stereoscopic acquisition on the real object. The color filter provides a very high color saturation for the three consecutive rows of red, green and blue CCD elements, and the image is collected as a whole. A high-quality true color matrix CCD has a relatively large pixel size, and a 10 μm × 10 μm size is a typical pixel size value. Larger pixel sizes can help reduce noise and other effects that may affect image quality.
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