Distorted Image using TW-Brother MFC-8860DN

[kirtom]

Hi,

I am having problems "acquiring" the scanned image properly from a Brother MFC-8860DN device (using GDPicture 7.4.0.3).

To be precise, the underlying code works on 99% of all tested scan-devices (i.E. fi-4120, fi-6130, hp 8500, etc.) but sadly not with this one.

To visualize the distortion, i've attatched an example of the scanned image.

Example using 8860DN

The sourcecode used to create the image is (IMHO) mostly equal to:

Code: Select all

            do
            {
                ImageID = oGdPictureImaging.TwainAcquireToGdPictureImage(new WindowInteropHelper(_ParentWindow).Handle);

                if (ImageID != 0){
                    nImageCount++;

		    string sTempName = System.IO.Path.GetTempFileName();
                    oGdPictureImaging.SaveAsJPEG(ImageID, sTempName, 75);
                    oGdPictureImaging.ReleaseGdPictureImage(ImageID);                
				}


            } while (oGdPictureImaging.TwainGetState() > TwainStatus.TWAIN_SOURCE_ENABLED);

            oGdPictureImaging.TwainCloseSource();

TWAIN-Settings are:

Code: Select all

            oGdPictureImaging.TwainSetIndicators(false);
            oGdPictureImaging.TwainSetModalUI(false);
            oGdPictureImaging.TwainSetAutoFeed(true);
            oGdPictureImaging.TwainSetAutoScan(true);
            oGdPictureImaging.TwainSetHideUI(true);
            oGdPictureImaging.TwainSetPaperSize(TwainPaperSize.A5);
            oGdPictureImaging.TwainEnableDuplex(false);
            oGdPictureImaging.TwainSetPixelType(TwainPixelType.TWPT_GRAY);
            oGdPictureImaging.TwainSetBitDepth(24);

Do any suggestions come to your mind? What might be the reason for this strange behaviour?

To cause a little more confusion:
The referred device produces a proper image by using MS Paint..

Best regards

kirtom

[kirtom]

I've successfully solved the problem by switching TWAIN-settings from grayscale to rgb.

Why does this help concerning the MFC-8860DN?

I've had a similiar problem with an OKI device. There, i had to switch from bw to grayscale to even produce an image [if I hadn't, the produced image would have been blank (white)].

Is this GDPicture-"bug" (?) fixed in V8?

Dear Loic:
Closing my ticket by stating "double post" and not replying to this post does disappoint me (your customer).

[Loïc]

Hi,

It is the second time I heard about this issue with the MFC-8000 family.
Please, provide a tiff image generated by a simple call to SaveAsTiff() which must be placed after "if (ImageID != 0){"

I also need a bunch of information + a tests from your case. Just follow all steps described on this thread: viewtopic.php?t=1486

Kind regards,

Loïc