Setting a resoltion of 1200dpi on an Epson V550 Scanner

[ijourneaux]

I am trying to create a small app to control a V550 scanner. When I do a get capability on resolution, I get a list back with 1134 entries that goes from 50 to 1184.

Since I am trying to set a scanning resolution of 1200, the call fails as 1200 is not in the list. This scanner is certainly capable ot 1200dpi as well as other higher resolutions.

How do I get to set those higher resolutios that are not in the list that comes back form the get call?

I have confirmed this behavior with TwainDotNet, SaraffTwain and NTwain.

Any help would be greatly appreciated.

[MarkM]

You would have to ask the scanner vendor that question. It could be a bug in their driver, or perhaps the resolution setting is dependent on some other setting, such as DAT_IMAGELAYOUT (ex: with a smaller frame, the resolution might go higher)…

[Kaij]

Have you tried MSG_SET TW_ONEVALUE on ICAP_XRESOLUTION and ICAP_YRESOLUTION with the value of 1200 instead working with the list of values?

Best regards,
kaij
http://www.jse.de

[Author]

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