imea: A Python package for extracting 2D and 3D shape measurements from images

Abstract

imea is an open source Python package for extracting 2D and 3D shape measurements from images. The current version of imea enables the extraction of 53 different 2D shape measurements, covering macrodescriptors such as minimal bounding boxes (Steuer, 2010), mesodescriptors such as the numbers of erosion to erase a binary image (DIN ISO 9276-6, 2012), microdescriptors such as the fractal dimension (DIN ISO 9276-6, 2012), as well as statistical lengths like Feret, Martin or Nassenstein diameters (Pahl et al., 1973a), as shown by the exemplary selection in Figure 1. Furthermore, 13 different 3D shape measurements ranging from volume (Pahl et al., 1973a) and minimal 3D bounding boxes (Steuer, 2010) to 3D Feret diameters and maximum dimensions (Steuer, 2010) can be extracted.