Fig. 5
![Fig. 5](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs40708-022-00159-3/MediaObjects/40708_2022_159_Fig5_HTML.png)
Classification process flowchart. Feature extraction can be one of six different modules and may include different levels of sub-zone and/or sub-band filters
Classification process flowchart. Feature extraction can be one of six different modules and may include different levels of sub-zone and/or sub-band filters