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CSRT tracker psr_threshold meaning and usage

Hi all,

I understand that using a different value for psr_threshold in CSRT tracker affects the reliability of the tracker. We made some tests and found out, that the default value of 0.035 is too small for us. Is there any recommended way of changing this parameter instead of just wild guessing based on empirical testing? Can somebody please explain the meaning of this parameter? What is a reasonable minimum or maximum value for psr_threshold ?

KCF tracker, for example, has the params::detect_thresh value which seems to be a percent reliability value so it's easy to use.

Thanks.

Alex