Forum Replies Created
Is it possible for me to manually manipulate the values in the data source file to MAKE the default resolution higher than 75 DPI??
Unfortunately, I am not aware of a way to manually change the default DPI setting in the DS file. I assume you need to contact HP support for further assistance in this case.
The issue we are running into is the quality of the scan. No matter what I do whether I modify the ScanApp.ini, adjust the settings trough the HPScan UI, or change the settings in the HP LJ M1530 Scan program, the scans always come back looking like garbage.
Just to confirm: so you are able to scan with a higher DPI in the HP Scan program but only not in your ERP program, right? If so, and if there is no DPI setting in the code of your ERP, you are right that the scanner will pick up the default setting (75 DPI). It should not be too difficult for your developers to show a list of available DPI values for scanning (or simply call the scanner UI for detailed settings) in your ERP. Something similar as the “Custom Scan” section on this page could make life a lot easier.
If you can’t even scan with a higher DPI in both the HP Scan program and your ERP, it should be a problem of the driver. Try reinstalling the twain driver to see if it makes any difference.
You mentioned you have poked around with Twacker. Did you try using Twacker to scan from your HP scanner with the same scanning settings? How did it turn out?
You may also try scanning with this online demo of Dynamic Web TWAIN (a web-based TWAIN SDK). If the same issue happens, check ‘Show UI’ checkbox to show the user interface of the scanner and adjust the settings there and see how it works.
If it works fine with Twacker or Dynamic Web TWAIN demo, then you may talk again with your software developer and check why your program didn’t pick up your resolution settings.
Hope it helps.January 13, 2015 at 7:28 am in reply to: Where can I access the files I scanned from Twacker 32 #26220
You may use the Save command under File menu of TWAICKER to save the scanned image and check the file size on your local disk.
What are you trying to achieve?November 12, 2014 at 9:09 am in reply to: How to set Sensitivity of AutoDiscardBlankPage function ? #26179
You may want to adjust the settings of Blank Image Threshold and Blank Image MaxStdDev. This kb article might help.
The two properties are from Dynamic Web TWAIN. You should be find the corresponding capabilities in TWAIN Specification.
Looks like an error returned by the driver. Have you tried scanning using Twack? If the same issue happens, you may try re-installing the driver and see if it makes any difference. Or you may contact the support of Canon and see if they have any suggestions.
It’s royalty free for you to distribute the app. You can visit the TWAIN license page to learn more details:
http://twain.org/about-twain/license.htmlJune 18, 2014 at 6:36 am in reply to: How can i communicate with twain from windows service ? #26156
Please make sure the current logon user of your service has proper permission to access C:Windowstwain_32 folder.
To have a quick test of TWAIN compatability online, you can try with this demo app in your browser. It’s developed using Dynamic Web TWAIN which is a web-based TWAIN SDK.
Did you try reinstalling the TWAIN driver of your MFP? The driver should be included in the disk coming with your MFP or you can get it from HP’s website.
This article might be helpful for you:
http://www.dynamsoft.com/blog/document-imaging-how-to/using-twain-in-net-applications/September 29, 2013 at 6:28 am in reply to: Browser not getting refresh while using TwainDSM 2.1 #26016
What TWAIN plugin do you use in your web application? If you share the TWAIN code you used to communicate with scanners, we may get more info to troubleshoot the problem.
Did you check the error message to see why it went to failure?
If your TWAIN driver doesn’t support the feature, you may also use a OCR SDK to achieve auto crop in your application.
When I use twack_64 the device does not appear in ‘select source’ however when I use the twack_32 the device does appear in the list, I am not sure what this means or how it relates to my application.
This indicates that you only have 32-bit TWAIN driver on the machine, which is the case for most scanners. You may confirm with the vendor of the scanner whether they provide 64-bit TWAIN driver. Or you need to compile your application in 32-bit mode to work with the 32-bit TWAIN driver.