Search found 4 matches

by kossman
Mon Sep 20, 2010 8:18 am
Forum: VintaSoft Twain .NET SDK Discussions
Topic: GetAsBitmap AccessViolationException
Replies: 2
Views: 6441

GetAsBitmap AccessViolationException

I'm using the new 7.0.2.1 version of Vintasoft.Twain.Net, and am having a problem I wasn't having with older versions (e.g. 7.0.0). Running the example TwainSimpleDemo I get an "AccessViolationException was unhandled" in the call: pictureBox1.Image = _device.AcquiredImages.Last.GetAsBitmap(True) (in...
by kossman
Wed Aug 11, 2010 11:46 pm
Forum: VintaSoft Twain .NET SDK Discussions
Topic: BrightnessMinValue / AutoBright problems
Replies: 4
Views: 7981

Re: BrightnessMinValue / AutoBright problems

I think device does not allow to change value of the capability. Yes you could be right. I thought it was working in an older version of VSTWAIN but in fact the value of AutoBright wasn't actually changing, and the scanner dialog box for the scanner doesn't include auto-brightness so it may not be ...
by kossman
Wed Aug 11, 2010 8:49 am
Forum: VintaSoft Twain .NET SDK Discussions
Topic: BrightnessMinValue / AutoBright problems
Replies: 4
Views: 7981

Re: BrightnessMinValue / AutoBright problems

Thanks Alex for the reply and the update to version 7.0. I do like some of the changes to the structures which I find to be more logical and easier to use. With regards to my previous problem, I still have some issues with the Autobright property of the 'Device' object. The BrightnessMinValue, Brigh...
by kossman
Fri Aug 06, 2010 2:19 am
Forum: VintaSoft Twain .NET SDK Discussions
Topic: BrightnessMinValue / AutoBright problems
Replies: 4
Views: 7981

BrightnessMinValue / AutoBright problems

I am developing a scanning application in VB.Net and most functions are working fine when connected to the scanner, but I have problems with the following propertys of the Vintasoft.Twain.VSTwain object: * BrightnessMaxValue * BrightnessMinValue * ContrastMaxValue * ContrastMinValue * AutoBright For...