Pixel Intensity to Temperature (Thermal camera)

[mohesh1]

Hi,

I am trying to buid a programme in Labview to capture thermal images from FLIR thermal camera (with out thermovision labview tool kit ).

I succeded in capturing 8 bit and 16 bit grey scale image from the camera but there is no direct relation connecting the pixel intensity and the temperature values

It would be great if you know any relation connecting pixel intensity and temperature.

I have gone through all the forum discussions regarding thermal camera and in all that its saying the grey scale pixel value can relate directly with temperature and unfortunately its not true in my case.

Please give any idea or suggestions regarding this

Looking forward to hear from you

Mohesh 

[johnsold]

Mohesh,

That information (relationship between pixel intensity and temperature) will have to come from the manufacturer of the camera. There is no way that LabVIEW or any toolkit can know how the camera imager responds to different wavelengths.

Once you have that information, someone here may be able to help you write LV code to scale the intensity to temperature.

Lynn

[NI-MarkN]

Hi Mohesh,

Did you have any progress on your application? 

johnsold was correct by saying that you should consut the camera's datasheet and then develop a custom VI to deal with that. But without this information there is not much we can do to be honest.

[mohesh1]

Hi Lynn, Mark

Thanks for the reply. I am in contact with camera technical support for the solution. In the mean time I have a question

when I am trying to grab images using the Gigabit ethernet camera there is an initial delay of 10 seconds inorder to capture the first frame. I was wondering is there any way I could reduce these initialisation delay for the camera.

[NI-MarkN]

I will check that for you, in the mean time would it be possible to see your code?

Thanks.

[mohesh1]

Hi Mark,

I am using the Lowlevel Grab.vi from the examples. No matter which example vi I use to grab or snap an image. There will be an initial delay of 10 seconds

I am using Labview 2012 and IMAQdx 4.0 

[falkpl]

Do you see this delay in Max as well.  Are you using a fully licensed version of imaq.  If you are in evaluation sometimes a popup (which sometimes shows up behind the VI so you dont see it) pops up and wants you to acknoledge that you are in eval and only has so many days left.

[mohesh1]

Hi Paul,

The delay is much less in Max. May be 3 or 4 seconds. Yes I am using a full licensed version of Imaq