Scanner
•Ngô Thùy Trang
•Nguy n Ng c Ti n ễ ọ ế
•Tr n Th Thùy H ngầ ị ươ
•Lê Vi t Tiênệ
•Ph m Th Nh Quỳnhạ ị ư
What is scanner?
•An input device that scans (reads) the
image as a series of dots and
introduces the information into the
computer’s memory.
(Infotech Glossary)
Some definition
•DPI
•Electronic code
•Digitized image
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.
(Prodic Dictionary)
Electronic code
•A scanner ‘see’ images and converts the
printed text or pictures into electronic
codes that can be understood by the
computer.
Electronic code