Лекции.Орг


Поиск:




Категории:

Астрономия
Биология
География
Другие языки
Интернет
Информатика
История
Культура
Литература
Логика
Математика
Медицина
Механика
Охрана труда
Педагогика
Политика
Право
Психология
Религия
Риторика
Социология
Спорт
Строительство
Технология
Транспорт
Физика
Философия
Финансы
Химия
Экология
Экономика
Электроника

 

 

 

 


A Scanners




Input devices such as scanners and cameras allow you to capture and copy images into a computer.

A scanner is a peripheral that reads images and converts them into electronic codes which can be understood by a computer. There are different types.

§ A flatbed is built like a photocopier and is for use on a desktop; it can capture text, color images and even small 3D objects.

- A flatbed scanner

§ A film scanner is used to scan film negatives or 35 mm slides – pictures on photographic film, mounted in a frame.

A film scanner

 

§ A hand-held scanner is small and T-shaped, ideal to capture small pictures and logos.

- A hand-held scanner

 

§ A pen scanner looks like a pen; you can scan text, figures, barcodes and handwritten numbers.

 

- A pen scanner

 

§ Barcode scanners read barcodes on the products sold in shops and send the price to the computer in the cash register. Barcodes consist of a series of black and white stripes used to give products a unique identification number.

- A barcode reader

 

The resolution of a scanner is measured in dpi or dots per inch. For example, a 1,200 dpi scanner gives detailed images than a 300 dpi scanner.

Most scanners come with Optical Character Recognition software. OCR allows you to scan pages of text and save them into your word processor; they can then be edited.

 





Поделиться с друзьями:


Дата добавления: 2015-09-20; Мы поможем в написании ваших работ!; просмотров: 1435 | Нарушение авторских прав


Поиск на сайте:

Лучшие изречения:

Надо любить жизнь больше, чем смысл жизни. © Федор Достоевский
==> читать все изречения...

2336 - | 2015 -


© 2015-2024 lektsii.org - Контакты - Последнее добавление

Ген: 0.009 с.