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Imageen + wia + acquireframeenabled = Wrong acquisition

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T O P I C R E V I E W
mastinf	Posted - Feb 28 2025 : 10:32:23 I don't have problems with TWAIN drivers but now i have to compile 64bit my application and so have to use WIA driver. I use this code to set the frame and acquire it: img.IO.AcquireParams.VisibleDialog:=false; // img is a TImageEnView img.IO.AcquireParams.AcquireFrameEnabled:= true; img.IO.AcquireParams.AcquireFrameLeft:= x; img.IO.AcquireParams.AcquireFrameTop:= y; img.IO.AcquireParams.AcquireFrameRight:= r; img.IO.AcquireParams.AcquireFrameBottom:= b; img.IO.Acquire; The frame acquired is not correct: a different area is acquired. The odd thing is that if, after the value has been set, i check in the debugger the value of AcquireFrameRight and AcquireFrameBottom i see that it's 0 Bug or what ? ImageEn Ver. 13.7.0 and Delphi 10.2.3 Roberto Nicchi Master Informatica Italy
4 L A T E S T R E P L I E S (Newest First)
xequte	Posted - Mar 06 2025 : 15:50:42 Hi Roberto Sorry, I can get neither to work correctly on my test scanners. Please email me for the latest beta which has improved some WIA methods, including setting the acquire rect (though I can only confirm that it should adhere to the "standard"). Nigel Xequte Software www.imageen.com
mastinf	Posted - Mar 03 2025 : 11:16:20 I have just tried with an HP scanner (WIA procol) and the image acquired corresponds perfectly to the selected frame if SetItemProperty is used. Using Acquireparams doesn't returns the correct image selected. Roberto Nicchi Master Informatica Italy
mastinf	Posted - Mar 03 2025 : 10:45:41 I have tried with the Scan WIA scanner app and i have much better result. Anyway yhe acquisition lack a bit of precision: the acquired image is not exactly the image frame selected. The twain acquisition is better. I have created a demo app. There a re two buttons: one acquire the image using settings stored in AcquireParams. The ther one is specific for WIA and use SetItemProperty. I have not been able to use AcquireParams and WIA. The acquired image is most of the time differenmt from the selected frame. Doesn't internally AcquireParams use SetItemProperty when the protocol is WIA ? If you can let me know if my code used in the demo app is correct. attach/mastinf/202533103918_ScanDemo.zip 58.4 KB Roberto Nicchi Master Informatica Italy
xequte	Posted - Feb 28 2025 : 19:29:39 Hi Roberto Ensure that you are not resetting the values before the acquire, e.g. by re-connecting to the device. Otherwise it's possible the scanner does not support that via the WIA interface. Can you try setting the properties manually using this demo: attach/xequte/2025228192934_WIAScanner.zip 19.4 KB Nigel Xequte Software www.imageen.com