Re: IR images index scale not linear and disjunct help?!

Posted by terin on Nov 28, 2009; 5:52pm
URL: http://imagej.273.s1.nabble.com/IR-images-index-scale-not-linear-and-disjunct-help-tp3690302p3690307.html

Here I have tried to attach an image.7210114I+copy.gif

terin wrote

Hi-

I used a NEC IR camera to take some images I would like analyze for mean, min, and max temperatures in different areas.  While I had access to the camera's software (thermography studio) I saved all images as BMP with a color temperature scale in the corner.  I thought that this would enable me to analyze the images using imagej.  Yet I am having trouble with the relationship between the index value and the temperature scale.  When I make a profile plot of the scale bar the plot  is almost linear except at very high temperatures when the index values drop to low values again (attached?). I can't seem to get rid of this disjunct pattern no matter what I try and some of the areas within my images I need to analyze fall within the non-linear portion of this relationship.  Any advice or help would be much appreciated.

thank you

profile+plot

7210114I+copy.gif