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Published: June 2001
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| bet | 8/16 | | Sana | 30.03.2021 | | Hajmi | 321.5 Kb. | | #13772 |
Scripting interface. WIA includes a scripting interface, which allows advanced users and IT professionals to develop WIA applications using the Microsoft Visual Basic® development system and other scripting languages.
TWAIN Data Source Manager and compatibility driver. The TWAIN Data Source Manager (DSM) is an industry-standard software library used to abstract TWAIN applications from still image devices. WIA uses the TWAIN DSM implementation in Windows XP together with the TWAIN compatibility driver to provide a compatibility layer for applications that support TWAIN version 1.7 or later, but don’t yet support WIA.
Common system dialog objects. All scanner and camera device drivers that ship in Windows XP use the WIA common system dialog objects. There are four system dialog objects: the scanner common dialog object, the still camera common dialog object, the video camera common dialog object, and the device selection dialog object. Represented in the UI as dialog boxes, these allow you to preview thumbnails and full-sized pictures; crop, scan, and set scan properties of a picture; view picture information; view live or recorded digital video and capture frames from the stream; select WIA devices; and set WIA device properties.
Device object. When the WIA device driver is started, it creates a system component called the device object. There are four types of device objects: WIA mini driver, WIA generic flatbed scanner, WIA generic digital still camera (based on the industry-standard Picture Transfer Protocol [PTP]), and WIA generic video camera object.
WIA Device Manager. When an application first communicates with a device, the WIA Device Manager detects all the devices, creates the device objects, establishes the link between the application and the device object, and retrieves and sets device properties.
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