How to extract features from a thermal Image and which is the best technique to extract?

I have to detect smallest deviation of temperature in my thermal video(map) by comparing it to the authentic one (training). What are the different attributes that should I extract and which technique should I apply for extraction? e.g PCA, 2DPCA. Based on these features I want to apply machine learning to detect the difference. Thanks

Answer 1

[Image Analyst]

Use imregister() to align your new image with your reference image. Then subtract them to determine the temperature difference between the two.

[Qazi Arbab Ahmed]

Thanks, Also I have to compare on the basis of spatial gradients, variance, means and standard deviation. How can I extract these?

[Image Analyst]

There are functions to compute those things: imgradient(), var(), mean(), mean2(), std(), and std2().

[Qazi Arbab Ahmed]

Thanks. How can I make them into a vector? I want to extract two features from my Image, Spatial Gradient and Pixel Intensity. How can I extract these from two different Images? Also have to train for Machine learning. Thanks

[Image Analyst]

Any variable can be made into a column vector with the (:) operation:

colVector = gxImage(:);

[Qazi Arbab Ahmed]

Thanks. I want to get data sets of two different images to for training, how can I make a Data set having 10, 10 Images? Thanks

[Walter Roberson]

https://www.mathworks.com/help/nnet/ref/dividerand.html

[Qazi Arbab Ahmed]

Thanks, Its helpful. I have 100 thermal Authentic Image and 100 Malicious Images, I want to train them and also want to extract features from them to apply machine learning to distinguish between these classes. What are the features that should be used to distinguish and which machine learning classifier will be effective? Currently I am trying to extract features like mean and SD but I could make response vector, as I am trying classification tool box that requires response and I am not getting it. If you have got idea could you please write some code. Thanks

[Image Analyst]

There's no way to answer this given the information and images you've provided (or not provided). LOOK HERE for ideas.