How to extract HOG and EHD features from '.txt' files?

I have '.txt' files and I want to extract HOG and EHD features from these files and I want to classify the targets using SVM and random forest classifiers.

Answer 1

[Alamanda Ponappa Poovaya]

Hi,

The first step would be to import the txt file into MATLAB. You can do so in 2 ways.

1. Use the Import Data optiom in the variable section on the home tab, and choose the output type as 'Numeric matrix'
2. Use the below code snippet

 A = readtable('metalpipe_er1_h5_d2.txt');
 B = table2array(A);

In order to extract the HOG features, you can use the extractHOGFeatures function. The documentation is linked below:

https://www.mathworks.com/help/vision/ref/extracthogfeatures.html

There is no inbuilt function to extract EHD features, but you can refer to the Answer linked below, it describes extracting EHD features

https://www.mathworks.com/matlabcentral/answers/334323-how-to-use-edge-histogram-descriptor-ehd-to-compare-2-image