A function for carbonation depth measurement out of an image of phenolphthalein sprayed fresh fracture of concrete beam.
The algorithm can be easily adopted for similar proposes, like chloride penetration.
a description of the algorithm can be found in:
2nd International RILEM Workshop on Concrete Durability and Service Life Planning, Haifa, Israel 7-9/9/09
please cite this reference in the method section in case you apply this algorithm.