vendor: Microsoft™ (WIA-to-TWAIN bridge)

Dosadi is not affiliated with this manufacturer.

website: Windows Image Acquisition Drivers
also: Still Image Devices (nice WIA overview)
comments: Microsoft does not sell any TWAIN devices, but they offer in Windows Me and Windows XP a module that makes all WIA devices also appear as TWAIN devices.

Microsoft seems unable to focus on imaging consistently for more than two consecutive quarters, so as usual, they support TWAIN without quite understanding it, while offering a competing proprietary standard called WIA - which they promote strongly but support indifferently.

On the positive side, for many devices WIA is plug-and-play, so a device can be used with no software installation. Also, compared to TWAIN 1.9, WIA offers substantially better control of digital still cameras and we recommend it for that.
devices: Numerous, particularly good support among digital still cameras.
issues: The WIA TWAIN driver notably violates the TWAIN standard by displaying a modal dialog during the MSG_ENABLEDS triplet. WIA also appears to have a time-out mechanism that can cause scanning to fail spuriously on devices with long lamp warm-up times. In general, we do not recommend using the WIA TWAIN driver with any device that has a native TWAIN driver: The native TWAIN driver always works better.
features: {TWAIN Features}


 
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