How a flatbed scanner works? 1: a flatbed scanner see images and converts them into electronic codes. Flatbed scanner A scanner with a glass scanning surface on which objects are placed similar to a photocopier. OCR software OCR (Optical Character Recognition) OCR software let you easily convert images, such as digital photographs, scanned documents, printed books, etc. Software for scanner Software for scanner translates the API procedure calls into primitive commands Some common scanner software: - SANE (Scanner Access Now Easy) - TWAIN - ISIS (Image and Scanner Interface Specification) - WIA (Windows Image Acquisition) Colored filter It has 3 different colors: RED, GREEN and BLUE. Rotating lamps The scanner operates by using 3 rotating lamps which has a different colored filter What is inside a scanner? Colored filter Rotating lamps Software for scanner OCR software The resolution and color of the scanned image is depends on BIT DEPTH of the scanner. BIT DEPTH It is the ability of the scanner to capture different colors. Digitized image A representation of a two-dimensional image using ones and zeros (binary). Electronic code A scanner see images and converts the printed text or pictures into electronic codes that can be understood by the computer. DPI DPI (dots per inch): density of computer or printer image: a measure of the density of the image produced by a computer screen or printer. Some definition DPI Electronic code Digitized image What is scanner? An input device that scans (reads) the image as a series of dots and introduces the information into the computers memory.

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