How to get the spatial summation of temperature inisde the specific ROI on each image and how to find that information for a series of thermal images and store as text file.

I have a series of thermal images and i need to find the average temperature value inside the ROI. The example of image is attched to this, i need to find the spatial summation of the temperature inside the specific ROI(inside the red boundry). Kindly help me to solve this problem

Thanks in advance

Answer 1

[Image Analyst]

See my Thermal image to temperature demo in my File Exchange:

Image Analyst's File Exchange

It's a generic, general purpose demo of how to turn a pseudocolored thermal image into a temperature image by extracting the image part and colorbar part from an image. Once you have the temperature image you can then use drawfreehand or drawpolygon to outline and area and find the mean temperature inside the drawn region. See attached drawing demos.

[JINU SUDHAKARAN Mr]

actually its is a series of 1000 images , in each image the area was different so drawing in each image is the difficulty. i write a code to find the area inside the boundry i need. the only thing i need to find the spatial summation of the temperature values for that specific region. Could you please help me for that

[Image Analyst]

Sure, but isn't that what I already did? Did you even try to adapt any of the demos I gave you?

[JINU SUDHAKARAN Mr]

I tried it. but it doesnt work

[DGM]

You haven't said whether your images are actual temperature data or whether they're false color images representing temperature, and you haven't said what exactly defines the ROI in each image. I assume you're not trying to process a thousand screenshots.

All we know is that you have some images with ROIs and that you want to either average or sum the values within the ROI.

[JINU SUDHAKARAN Mr]

these images are the processed image by matlab . i selected the ROI as the region above 40 deg c. and the region inside that boundary are the region above that specified temperatre and i need tp find the average of temperatures in that area

[DGM]

Then use the ROI mask to select that region in the original data and find the average of those values. There's no point in working on screenshots with annotations in them instead of using the original data and masks.