What does "Ensemble average for a given window of pixels" mean?

by Pavan Kumar Akula   Last Updated April 15, 2019 11:22 AM - source

Can someone please let me know what does "ensemble average for a given window of pixels" mean when calculating a coherency or covariance matrix? I have taken this sentence from a paper "Polarimetric Target Decompositions and Light Gradient Boosting Machine for Crop Classification: A Comparative Evaluation".

According to my understanding I have to consider a window of size m x n and take the pixels of a radar image in that window and then perform ensemble averaging i.e. mean of those pixels. Please let me know whether my understanding is correct or not.

As of now I am performing a 2D convolution with a square window and varying their size to analyse the performance.

Here is the document that I am referring to: https://www.mdpi.com/2220-9964/8/2/97

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