As a high-tech product closely integrated with optical, mechanical, electronic, and software applications, the scanner is the third generation of major computer input devices after keyboard and mouse. Since the birth of the scanner in the 1980s, it has been rapidly developed and widely used. From the most direct pictures, photos, film to various drawings and documents, documents can be input into the computer with a scanner to achieve these images. Processing, management, use, storage or output of information. But what brand of scanner is good? How to choose?
What brand of scanner is good? Detection method:
1. Detecting the photosensitive element: Scan a set of horizontal thin lines (such as hair or wire), then browse in ACDSee 32, set the ratio to 100%, if there is a broken line in the longitudinal direction, indicating that the photosensitive elements are not evenly arranged or There are bad blocks.
2. Detecting the transmission mechanism: Scan a picture of the size of the scanner. View it in ACDSee 32 and set the ratio to 100%. If there is a tear in the horizontal direction or a horizontal line that can be observed, the transmission mechanism has mechanical failure.
3, detection resolution: scan the color photo with the scanner's nominal resolution (such as 300dpi, 600dpi), then browse in ACDSee 32, set the ratio to l00% observation, will not observe the mixed color block is qualified, otherwise Insufficient resolution.
4, check the gray level: select the scanner's nominal gray level, scan a night photo with lights, pay attention to observe the level between the bright and dark, grayscale scanner, image details (especially dark areas) performed better.
5. Detecting the number of color bits: Select the nominal color number of the scanner, scan a colorful color photo, set the display mode of the display to true color, compare it with the original, and observe whether the color is full and there is no color cast. It should be noted that there is no such thing as the original, and the display may have a color shift, which may affect the observation. The scanner's photosensitive system will also produce a certain color shift. Most high- and mid-range scanners come with color correction software, but only a few low-end scanners have color correction software. Please perform color calibration of the monitor and scanner before testing.
6, OCR text recognition input detection: scan a self-printed draft, using black and white binary, nominal resolution scanning, 300dpi scanner can correctly identify the 5th word in the newspaper, 600dpi scanner I can almost recognize the 7th word on the business card.
What brand of scanner is good? I hope that the above experience can help you.
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