РЕКЛАМА
ИНФОРМАЦИЯ
Rambler's Top100 Рейтинг@Mail.ru

ПЕРИФЕРИЯ

Four 1200 dpi Scanners Under Scrutiny
Краткое содержание статьи: The new generation of scanners uses all of its wiles to tempt you. Scanners have plenty of attractive selling points for 2002, and even the most modest of the bunch is happy to add a range of buttons to the front of the casing and improve the design. Scanners with the most functionality have already adopted the USB 2.0 interface, so they are able to offer spectacularly fast processing time. Others offer units for scanning slides. Yet, in spite of being very different from each other, all of these models have two important points in common: they all have 1200 dpi CCD optical detectors and cost less than $200.

Four 1200 dpi Scanners Under Scrutiny


Редакция THG,  27 марта 2002
Назад
Вы читаете страницу 1 из 17
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
Далее


Introduction

Introduction

If you take a look at how a scanner works, you'll realize that nowadays there is no justification for buying the most expensive model. Here are four of the most recent ones:

  • The CanoScan D1250U2 is the first scanner for general use that is compatible with the new USB 2.0 interface. In North America, this model is sold as D1250UF, which includes a USB 2.0 PCI card and an adapter unit for scanning transparencies.
  • The Epson Perfection 1250 is the successor to Perfection models 1240 and 640. The 640 is still considered by many to be the best in its class.
  • The ScanJet 4470C is marketed by HP as a "reliable and affordable scanner, as simple to configure as it is to use." It is supplied with a module for scanning slides and transparencies.
  • The Umax Astra 4500 claims to be a speedy workhorse at a very low price. Certainly it was the least expensive model in our selection.

All four of them share an optical resolution of 1200 dpi and 48-bit color-coding, and all are USB compatible. In other words, all of them ought to be capable of producing good-quality scans at low resolution (website images) and at high resolution (retouching and enlarging photos).

In order to compare them, we timed them on the following tasks:

  • pre-scanning an A4 page
  • scanning a 10 x 15 cm photo at 72 (or 75), 300, 600 and 1200 dpi
  • scanning a photo from a magazine at 300 dpi
  • scanning a postage stamp at 1200 dpi and 2400 dpi (an interpolated resolution in this case)
  • scanning an A4 photograph at 300 dpi

The test for quality consisted in comparing all the previous results, as well as:

  • evaluating the color rendering of the optical system, based on our test patterns
  • considering the scanners' ability to scan 3D objects
Назад
Вы читаете страницу 1 из 17
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
Далее


СОДЕРЖАНИЕ

Обсуждение в Клубе Экспертов THG Обсуждение в Клубе Экспертов THG


РЕКЛАМА
РЕКОМЕНДУЕМ ПРОЧЕСТЬ!

История мейнфреймов: от Harvard Mark I до System z10 EC
Верите вы или нет, но были времена, когда компьютеры занимали целые комнаты. Сегодня вы работаете за небольшим персональным компьютером, но когда-то о таком можно было только мечтать. Предлагаем окунуться в историю и познакомиться с самыми знаковыми мейнфреймами за последние десятилетия.

Пятнадцать процессоров Intel x86, вошедших в историю
Компания Intel выпустила за годы существования немало процессоров x86, начиная с эпохи расцвета ПК, но не все из них оставили незабываемый след в истории. В нашей первой статье цикла мы рассмотрим пятнадцать наиболее любопытных и памятных процессоров Intel, от 8086 до Core 2 Duo.

ССЫЛКИ
Реклама от YouDo
YouDo: настройка швейных машин спб, подробное описание здесь.
Создание интернет-магазина косметики: заказать на YouDo.