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provide a Source Manager and Twain Data Source to work with ToupView.

Select the active device for Twain: Acquire••• from all devices available in the device

list box which are enumerated by the application.

One must install the Twain Device hardware and its driver first. See the

documentations provided by the device manufacturer for the installation

instructions.

Before begin to start Twain:Acquire at the first time with ToupView, choose

File>Twain:Select Device••• command first, then select the device. One does not

need to repeat this step for subsequent choosing of the Twain:Acquire••• command.

6.5 Twain:Acquire•••

Introduction

There are basically two techniques used to capture the video images from video

devices such as a PC camera, digital camera, and scanner. They are the

Twain:Acquire••• technique and the DirectShow technique (previously called VFW).

The most obvious characteristics of the Twain technique is that it displays the Video

in smaller resolution but captures the image in high resolution. The USCMOS and

UHCCD series cameras support all of these two image capture techniques.

Steps for Twain Acquire

Here we illustrate how to capture the image using a UHCCD01400KPA (1.4M pixels,

USB2.0) camera as an example.

1. Install the camera driver (for example driver for UHCCD01400KPA hardware);

2. Install ToupView;