The algorithm for obtaining the aspect ratio of irregular shape

I am developing an image analysis application, and I need to calculate the aspect ratio of a segmented particle.

According to http://www.sympatec.com/Science/Characterisation/05_ParticleShape.html AR is set (Fig. 1) Xfmin / Xfmax.

Any suggestion for an algorithm to get these values ​​(Xf)?

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Source: https://habr.com/ru/post/1758552/


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