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Scanners use a row of photo-sensitive transistors behind a semi-cylindrical lens on an assembly that can traverse a page on its long axis. Mounted on the lens assembly with the sensor strip is either a florescent lamp or a series of bright white LEDs to illuminate the width of the page beneath the sensor strip. The density of the photo-transistors along the sensor strip is what determines the maximum pixel density across the page, while the stepper assembly that drives the sensor bar determines the maximum pixel density of the page length. When the scanner makes a pass to scan in a page, the page is digitized into a bitmap image of the original. This bitmap is just an image and can be manipulated as such.
Most of today's scanners come with software that allows you to manage these scanned images. If the original page was one with text, the software usually has an OCR (Optical Character Recognition) function that allows you to translate the bitmap image into ASCII text characters to be manipulated in text programs. If the original page was clean with well defined characters, there will be a minimum number of character errors in the transcription. If the original page was crumpled, dirty, and/or had broken type, there will be many more character errors in the transcription.
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∙ 11y ago
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How long does the average scanner take to scan a page?
With many of the advances in scanners, you can now scan a page in less in 30 seconds. However, there are some industrial scanners were you can scan in less in 20 seconds.
What can infrared scanners do?
scan packages and detect unusual objects.
Do document scanners scan in black and white only?
No, the most common scanners today have a feature where you can have both black and white, and also with colors.
Do cannon scanners need ink to scan?
Ink is not needed to scan, as the scan is taken digitally and stored as a graphic file. Ink or toner is needed in the printer to print the result of the scan on to paper.
Where are computer scanners used?
Anywhere, and by anyone, who wants to scan an image into a computer. =D
Do computer scanners need ink to scan photographs?
scanners dnt use ink as no output is formed in the form of hard copy , these just form the image
What is the common name for CAT scan?
uuuh lets seee........ a cat scan!
What are the types of scanners?
scanner type usage optical resolution maximum scan size features
How do the scanners at the store work?
They work by scanning the food or labels to scan it to bye the food... Ha
What is the most trusted online antivirus scan?
According to 7 Tutorials, which ran a comprehensive comparative test of some of the most "popular" online virus scanners, ESET Free Online Scanner and Panda Active Scan are two of the best online virus scanners.
Can you listen to music in F.Y.E. before purchasing?
Yes, most stores have those scanners you can scan the UPCs with.
How do you scan a Word document from my scanner into Word or my clipboard so you can Edit it?
You need Optical Character Recognition (OCR) software to convert the image from the scanner into text that you can edit. With most scanners, you cannot scan directly into Word. Some scanners (like HP and Canon), sometimes include OCR options. Sometimes OCR is called Scan to Text.
