Write 12-bit TIFF with LV

[Ben]

I am trying to help out one of my co-workers who needs to write a 12-TIFF file in LV.

He thinks he did 8-bit but the req. is for 12-bit.

So anyone that wants to straighten me out, please do so.

Thank you!

Ben

PS Tim (Mellowbuck) will reply with more details shortly.

Message Edited by Ben on 11-19-2009 03:02 PM

[Mellobuck]

Thanks Ben!

My Main question is that I seem to be able to produce an image which consists of U16 grayscale, and then I use the IMAQ Write (shown below).

Upon re-opening the TIFF file (tim4.tif), each pixel intensity is truncated at 8-bit (255) at each pixel where it exceeded 255.

How do I keep greater than 8-bit resolution on this file? Or, am I missing something on opening the data?

Thanks,

Mello

Message Edited by Mellobuck on 11-19-2009 03:13 PM

[Hummer1]

If the image data is U16 and you format the image I16 that might be an issue.  I don't understand applying the color palet gray at the image write...could that be conflictign with the original image definition...

?

Hummer1

[Darin.K]

Caveat: I have never touched the IMAQ VIs.  That said, I am suspicious of the Cast Image VI, I would guess the default is a U8 Grayscale (I don't see anything to specify the type of Image you are casting to).

[Hummer1 · Accepted solution]

This seems to work...havn't checked the numbers, but they seem to come in and go out the same size.

[muks]

Ben,

I started getting interacting in this forum for the exact same reason. I had a image processor chip that would give me a 12 bit image data and i wanted to map that into an image. I ended up converting it into a 16 bit value by manupulating the lsbs (adding 0000) and then mapping it. 

[Ben]

Well first let me thank you all for the replies. I really appreciate it.

Tim has just arrived in the office and will check out your suggestions soon. I wll insist that you all get Kudos from him as well.

Ben

[Mellobuck]

Thank you, Hummer! That was the correct solution. I removed the cast image and palette functions, and the numbers came in and out correctly. The image references had originally not connected without the cast image function, but I guess I got rid of the conflict somewhere along the line.

I'll let Ben know to mark this as a solution.

-Mello

[Hummer1]

You're welcome.

Darin.K's cast catch was important!

Hummer1

[Ben]

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Hummer1 wrote:

You're welcome.

Darin.K's cast catch was important!

Hummer1

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Should I mark his reply as the solution or should I just get him some more Kudoes?

Ben