Visioneer Knowledgebase
Visioneer Knowledgebase
Title: What is WIA
Article ID: VIS1177
Updated: 3/28/2007
Operating Systems: Windows Me / XP / Vista
Scanner Models: Visioneer Flatbed: 9520, 9420, 7400, 9320, 9220, 9120, 9020, 9000, 8900, 8800, 8700, 8600, 8100, 7700, 7600, 7300, 7100, 6600, 6400, 7600, 6200, 6100, 6000, 5800, 5600, 5300, 4800, 4500, 4400, 3300, 3100, 3000, PaperPort OneTouch
  Visioneer Strobe: XP300, XP200, XP100, RoadWarrior (RW120, PRW120), StrobePro, StrobePro NT, PaperPort VX, MX and IX
  Visioneer ADF: XP470, XP450, 9750, 9650i, 9450, 8650, PT430, PT470, PT680, PT780
  Xerox : X6400, X7600, X4800, X2400DM250, DM250L, DM252, DM262, DM262i, DM272, DM150, DM152, DM162, DM510, DM515, DM520, DM632, DM3640, DM752
 
What is WIA:
 
WIA (Windows Image Acquisition) is a standardized interface created by Microsoft for acquiring digital images from devices that are primarily used to capture still images and for managing these devices. It has the same interface for all devices, but typically doesnt have all the features that the full TWAIN driver would have.
 
What does WIA Do:
 
WIA is a built in driver for Windows XP to interface with imaging devices. The WIA driver would be best suited for someone who wants less options or someone who doesnt understand all the options presented to them. It is the most simplistic interface possible.
 
More Information:
 
WIA provides a TWAIN compatibility layer that allows TWAIN-aware applications to communicate with Microsoft Windows Image Acquisition (WIA) devices. TWAIN-aware applications do not have full access to WIA functionality. For example, an application cannot suppress the user interface using the TWAIN compatibility layer.

WIA devices appear twice to an application that is aware of both WIA and TWAIN: once through normal WIA communication, and once through the TWAIN compatibility layer. To avoid listing a WIA device twice, an application that is aware of both WIA and TWAIN must filter out the WIA devices that come through the TWAIN compatibility layer. All WIA devices that come through the TWAIN compatibility layer have "WIA-" as a prefix, so it is easy to filter them.

 

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