A scanner is a device that captures images from photographic prints, posters, magazine pages and similar sources for computer editing and display. Show
Scanners work by converting the image on the document into digital information that can be stored on a computer through optical character recognition (OCR). This process is done by a scanning head, which uses one or more sensors to capture the image as light or electrical charges. The document scanner moves either the physical document or the scanning head, depending on the type of scanner. Then, the scanner processes the scanned image and produces a digital image that can be stored on a computer. Scanners usually attach to a computer system and come with scanning software applications that let you resize and otherwise modify a captured image. If a printer is hooked up to the computer, you could print a second hard copy of the scanned image and store it in digital format. What types of scanners are available?Modern scanners come in handheld, feed-in and flatbed types and are for scanning black-and-white only or color.
However, it's also worth noting that scanners are embedded in other devices such as photocopiers, barcode scanners and fax machines used to make copies of documents and images. In addition to the intended purpose of a scanner, a buyer will also need to know the type of image resolution they need from the scanner. Printer with built-in scannerWhat is scanner resolution?Image resolution refers to the number of pixels captured by the scanner sensor and is measured in dots per inch (dpi). The higher the dpi, the greater the scanner's ability to capture detail. For example, a scanner with a resolution of 1200 dpi can capture 1200 pixels per inch of an image. Very high-resolution image scanners are used for scanning for high-resolution printing, but lower-resolution scanners are adequate for capturing high-quality images for computer display. The scanner's resolution is determined by the number of sensors in the scanning head. Manufacturers of scannersSome major manufacturers of scanners include Epson, Hewlett Packard, Microtek and Relisys. These companies offer a variety of scanner types and resolutions from which to choose. For example, Epson offers flatbed and handheld scanners, with resolutions ranging from 300 dpi to 12800 dpi. Hewlett Packard offers sheetfed and flatbed scanners, with resolutions ranging from 1200 dpi to 4800 dpi. Microtek manufactures only flatbed scanners, with resolutions ranging from 1200 dpi to 3200 dpi. Relisys manufactures both sheetfed and flatbed scanners, with resolutions up to 2400 dpi. When choosing a scanner, consider the type of scanner you need as well as the image resolution you require. Pricing varies depending on the brand, type, resolution and whether it is intended for personal or business use. Decide on a budget first, then compare the features offered by different manufacturers to find the scanner that best meets your needs. See also: 2D barcode, document reader, document capture, enterprise document management, TWAIN This was last updated in April 2022 Continue Reading About scanner
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How is a scanner connected to a computer?Plug the USB cable from your scanner into an available USB port on your device, and turn the scanner on. If that doesn't work, here's a way to do it manually. Select Start > Settings > Devices > Printers & scanners or use the following button. Select Add a printer or scanner.
What are printers and scanners called?Computer devices such as mice, printers, scanners and speakers are known as peripheral hardware. These peripherals are further split into two categories, input devices and output devices.
When a new printer is connected to a computer installing a special software is usually required for the proper functioning of the printer?If a new device is attached to a computer,such as a printer or scanner, its Driver must be installed before the device can be used.. If a new device, such as a printer or scanner, is attached to a computer, its driver must be installed before the device can be used. .... |