| T O P I C R E V I E W |
| Claus.Gerlach |
Posted - Feb 12 2015 : 09:02:27
Hello,
I'm using your IEvolution-Component in a simple scan-application.
The twain-dialog is disabled. In this application users have the option to scan with 100, 500 or 1200 DPI.
All works fine with one exception:
If we use the "EPSOPN Perfection V370 Photo"-scanner, scanning with 1200 DPI results in a 72 DPI Image. This happens under OS Windows XP (32bit) and Windows 8.1 (64bit).
Debugging the program shows the following remarkable values:
...TWainParams.XResolution.RangeMax = 1184
...TWainParams.YResolution.RangeMax = 1184
This value is far away from the maxium you can set with the native program EPSON SCAN.
Best Regards
Claus Gerlach |
| 3 L A T E S T R E P L I E S (Newest First) |
| xequte |
Posted - Feb 13 2015 : 13:56:05
Hi Claus
It depends on how the driver handles out of range values, but you should ensure you set CurrentValue to <= RangeMax.
Nigel
Xequte Software
www.xequte.com
nigel@xequte.com
|
| Claus.Gerlach |
Posted - Feb 13 2015 : 05:32:58
Hi,
settings like 100 or 500 DPI work fine with my app.
Other apps like XnView scan via TWAIN 1200 DPI in right way.
Best Regards
Claus Gerlach |
| xequte |
Posted - Feb 12 2015 : 18:34:23
Hi Claus
So you are setting XResolution.CurrentValue/YResolution.CurrentValue to 1200 and it is returned as 72DPI? Does have settings work correctly, such as 1184?
Have you compared with another Twain scanning app on that system?
Nigel
Xequte Software
www.xequte.com
nigel@xequte.com
|
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