IMAQ write jpeg doesnt generate any file

[gillie]

hi all,
i am using IMAQ to save a jpeg but no file is being generated on my disk. i can display the image with the draw functions but cant save it. its as if no file path is specified, which i have done.
has anyone come across this problem?? any help please!!
Thanx,
Gillie

[Yusuf C]

Hello,

Do you have error checking enabled in your code? If so what's the error code and string?
Try running the Snap and Save an Image to File Using Only NI-IMAQ example. I just tried and it seems to work fine.

Regards,

Yusuf C.
Applciations Engineering
National Instruments

[gillie]

Hi,
thanks for your reply. the error code is -1074396080 and the string is as follows
'IMAQ WriteJPEGFile
Invalid image type.'
the 'winddraw' function does display the image correctly though. i am at a loss!!
thanx
gillie

[Yusuf C]

Hello,

IMAQ Write JPEG File.vi only supports 8bit and RGB (32bit color) images. If your image is not one of these you can't save it as a JPEG file. In that case you'll need to save it as a PNG or TIFF file.

Regards,

Yusuf C.
Applications Engineering
National Instruments