How do I specify resolution, NOT size, in IMAQ/LabView

[milo]

I have a grabbed picture that I have rescaled so that it has the right scale/size at 300 dpi, and I want the saved (.jpg) picture to know this.

Is it possible to do this without using an external program?

[Mike H2]

You can change the image quality on the IMAQ Write JPEG.vi. This in effect is going to change the resolution. You cannot change the resolution directly.

[BruceAmmons]

Milo,

I don't think it is possible within LabVIEW to specify the DPI.

The only way I could find was calibrating the image and saving the calibration info with the image. This is stored in a PNG format, and is only readable within LabVIEW, so it probably won't help you.

Bruce

[John Pierson]

Hi, you can specify size and dimension through zoom, and interpolation in the IMAQ menu, but resolution isn't one of them im afraid.
I'm working on something simular i'll let this thread know if i manage anything.
John P.