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Learn about the history, applications, and techniques of optical character recognition (OCR), the conversion of images of text into machine-encoded text. OCR can be used for data entry, document digitization, text mining, and assistive technology.
Optical mark recognition (OMR) is a technology that collects data from people by identifying markings on a paper. It is used in exams, voting, mail processing and other applications that require fast and accurate grading or tallying.
Nmap is a network scanner that can discover hosts and services on a computer network by sending packets and analyzing the responses. It has features such as host discovery, port scanning, version detection, scripting, and fingerprinting, and has been developed since 1997 by Gordon Lyon (Fyodor).
A barcode reader is an optical scanner that can read printed barcodes and send the data they contain to computer. Learn about different types of barcode readers, such as pen, laser, CCD, camera and omnidirectional scanners, and how they are used in various applications, such as retail, inventory, movies, music and more.
QR code is a type of two-dimensional barcode invented in 1994 by a Japanese company for labelling automobile parts. It can store data for various purposes, such as web tracking, product identification, and mobile tagging, and can be scanned by imaging devices like cameras.
An image scanner is a device that converts images, text, handwriting or objects to digital images. Learn about the precursors, analog and digital eras, and different types of image scanners, such as flatbed, sheetfed, handheld and document cameras.
An automatic document feeder (ADF) is a feature in printers, scanners, copiers and fax machines that feeds multiple pages into the device. Learn about the types, speed and capacity of ADFs and how they differ from duplex printing.
Imaging does not require moving parts, as a laser scanner does. In 2007, linear imaging had begun to supplant laser scanning as the preferred scan engine for its performance and durability. 2D symbologies cannot be read by a laser, as there is typically no sweep pattern that can encompass the entire symbol.