Dynamsoft TWAIN Products

Hello,

I'm using an ADF to acquire image.
Everything is ok but when I have to set the image size:

Twain->DisableSource();
Twain->SelectSourceByIndex(lbxScanner->ItemIndex);
Twain->OpenSource();

Twain->IfShowUI = false;
Twain->IfDisableSourceAfterAcquire = true;

Twain->PixelType = 1;
Twain->BitDepth = 8;
Twain->Contrast = StrToFloat(tbxContrasto->Text);
Twain->Brightness = StrToFloat(tbxLuminosita->Text);
if (cbxRisoluzione->Text.IsEmpty())
Twain->Resolution = 200;
else
Twain->Resolution = StrToFloat(cbxRisoluzione->Text);


Twain->IfFeederEnabled = true;
if (Twain->IfFeederEnabled)
{
Twain->XferCount = -1;
Twain->IfAutoFeed = true;

if (Twain->IfFeederLoaded == true)
{

if (Twain->Duplex != 0)
{
if (cbxOrigineDoc->Text == "ADF - Fronte-Retro")
Twain->IfDuplexEnabled = true;
else
Twain->IfDuplexEnabled = false;
}

Twain->PageSize = 1;

Twain->AcquireImage();
}
}

C++ Builder says:
"Function call terminated by unhandled exeption"

Thank you for your cooperation.

I tested the code above and can not reproduce the problem.
Please try using the ErrorString property to get the error message. For more information of this, please refer to:
http://www.dynamictwain.com/help/TWAIN/ ... String.htm

Thanks.

Hello,

I'm using Dynamic TWAIN and the error message is here below:

"Capability not supported by Source or operation is not supported on capability, or capability had dependencies on other capabilities and cannot be operated upon at this time."


The scanner is for A4 but we are using the ADF of the scanner so the image saved has a size quite bigger then A4, for that reason we have to use the property PageSize.

I checked the PageSizse Property in different languages and can not reproduce the problem.

The error message means your driver does not support the property. Do you have any other drivers of the scanner? If yes, please try with other drivers to see if it works.

Also, you can use the SetImageLayout method to set the image layout. For more information of this, please refer to:
http://www.dynamictwain.com/help/TWAIN/ ... Layout.htm

Thanks.

Hello,

I tried with another scanner but it's still the same, I tried to scan the image with the scanner's software and I was able to set the page size because I set by the combobox of Espon GT2500 SW the layout "A4(210 x 297 mm)" and it works.
So I think it's strange that the drivers does not support the PageSize.
Otherwise, Could you explain the measure unit to set the image layout, what do you mean with the floating point number?

Thanks a lot

The unit of measure is INCHES. Also, you can use the Unit property to set the unit of measure. For more information of this, please refer to:
http://www.dynamictwain.com/help/TWAIN/prop%20Unit.htm

Thanks.