Exact Meaning of the parameters given to initialize MSER in OpenCV 2.4.x?

Question

OpenCV reference manual (2.4.x) states that the constructor that initializes MSER requires the following parameters:

delta, min_area, max_area, max_variation, min_d

Answer 1

• Delta delta, in the code, it compares (size_{i}-size_{i-delta})/size_{i-delta}. default 5.
  • MinArea prune the area which smaller than minArea. default 60.
  • MaxArea prune the area which bigger than maxArea. default 14400.
  • MaxVariation prune the area have simliar size to its children. default 0.25
  • MinDiversity trace back to cut off mser with diversity < min_diversity. default 0.2.
  • MaxEvolution for color image, the evolution steps. default 200.
  • AreaThreshold the area threshold to cause re-initialize. default 1.01.
  • MinMargin ignore too small margin. default 0.003.
  • EdgeBlurSize the aperture size for edge blur. default 5.
  • Mask Optional input mask that marks the regions where we should detect features