Optical scanner do not distinguish text from illustrations.

光学扫描仪不能区分文本和图形。

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Absrtact: Document text images captured by book scanner or camera usually require resolution enhancement for other usage, present a text image enhancement algorithm based on Markov random field.

摘要：对于扫描或相机拍摄的低分辨率文本图片，提出一种基于马尔科夫随机场的文本图像清晰化算法。

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Scanner: An equipment that converts photographic or hand-drawn original into digital data. An OCR machine can converts typed or printed text into digital data.

扫描机：把书稿或相片转为数码资料的机器。光学文字识别机是扫描机的一种，它把打字字体或印刷字体转为数码资料。

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All things considered, however, the ScanJet 6200C is a reasonable choice for the low-volume corporate user who needs an easy-to-use scanner primarily for text documents.

CNN: Reviewing the top 10 scanners

An optical-character-recognition machine for the blind that's capable of reading most types of printed text aloud, the CCD flatbed scanner, speech-recognition software, the first synthesizer that created sounds virtually indistinguishable from those produced by their acoustic counterparts, and a whole bunch of other nifty things we can barely comprehend came from Ray's brain.

CNN: STORY HIGHLIGHTS

Dr Sheridon has come up with a so-called wand an electronic stick that can hold ten full-size books and also transfer text on to a sheet of Gyricon if a user runs the wand over the surface like a handheld scanner.

ECONOMIST: Showing off