How to calculate the Euclidean distance between two points in image?

I am trying to segment the lobes in CT thoracic images.To segment the lobes, it is necessary to find the fissure. There are several steps to do it. I blocked in the calculation of Euclidean distance. Here is the formula: DE = DBW-DW Where DE = Distance between the boundary and the centre point of the empty region. DBW = Distance between the boundary and the centre point of the reference region. DW = Distance between the boundary and centre point of the non empty region. I have attached the image where I want to calculate the distance.

Answer 1

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