"tiff SDK/Activex" jpeg compression problem!!!!!!!!!

[Nunzio]

I'm using the "tiff SDK/Activex" and i have this problem: i want to scan an image and save it in the tiff format and jpeg compression but i can't be able to do this. The code that i have used is this:

Sub TwainCtrl_Done(hDibOutput,FileOutput)
dim retval
BiDisp.hDib=hDibOutput
retval=TiffObj.SaveDIBInTiffFormat("c:\pippo.tif",hDibOutput,imgcmNoComp,True)
alert(retval)

end Sub

so i view a user interface where i can set the compression type for the tiff file, when i set "no compression" or "differential LZW" it save the image and retval is equal to TRUE but if i set "jpeg compression" it don't save the image and retval is FALSE; why? I have scanned a coloured image with a resolution of 24 bit.

Another question: How can i set the "Quality jpeg" and "Resolution jpeg" properties for the jpeg compression in the tiff format? With the "Kodak Imaging" i can set this properties.

Thanks, Nunzio

[TechnicalSupportTeam]

Can you reproduce this issue using any of the sample applications? If not, please check the source code of the sample, to see what are you doing differently.

The resolution of the JPEG image will be the resolution of the DIB. The quality is available only when you save the DIB into a JPEG file (Image SDK), it is not available when you save JPEG compressed TIFF files.

[Nunzio]

if i use "Sample Source Codes->OCX->Visual Basic->TiffVbSample.vbp" i can't save a coloured image in tiff format with jpeg compression but if you use "Sample Applications->OCX->Visual Basic->Tiff Sample" there is no problems.

I repeat the step of my example:
1)scan an coloured image
2)save the image in tiff format with the jpeg compression

[TechnicalSupportTeam]

This issue is most likely occuring because the newly compiled exe cannot locate the BIJPEG.DLL. The Visual Basic environemnt is probably changing the working directory and that is why the application cannot find the BIJPEG.DLL. The solution is to add the directory where the DLLs are located to the path.

[Nunzio]

In vbscript, how can i use the BiJpeg.dll?

[TechnicalSupportTeam]

You do not need to use the DLL. The BIJPEG.OCX relies on the BIJPEG.DLL. You can still use the BIJPEG.OCX, however you must make sure that the BIJPEG.DLL is in the same directory as the OCX control.