TMA Vessel Segmentation Based on Color and Morphological Features: Application to Angiogenesis Research
Table 1
Morphometric measurements.
Measurements
Meaning
Units
Localization
- coordinates
Pixels
Area
Vessel contour area
Physical units (m2)
Size
Vessel width and height
Physical units (m)
Perimeter
Perimeter
Physical units (m)
Angle
Angle between the horizontal axis and the first side (i.e., length)
Radians
Vascular density
Physical units (vessel number/m2)
Aspect
Roundness
Perimeter ratio
Deformity
Convex area − area
Physical units (m)
Shape
Vertices
Calculates the approximate contour polygon vessel with less distance between vertices using the Douglas-Peucker algorithm [19]
and . are the Hu moments of the normal and convex contour area , respectively, and represents the seven Hu invariant moments.
*These axes correspond to the best-fitting ellipsoid of the vessel contour.