Abstract
There is the use of PTV or PIV to make measurement velocity of fluid by flow phenomena. The binary of PTV plays an important role in measurement of velocity. Conventional binary methods are P-ti le, Otsu, and Mod method. Their methods can not be binary at high particle density in local area. We do not get to correct result using Dynamic Thresholding method at high particle density in local area. We suggest that Dynamic Thresholding method by Hamming distance uses for shape recognition.
