Correlation between contrast range and the number (and or the length) of detected ridges

[Asef67]

Hello,
thanks for the plugin.
If I understand well, a larger contrast range should give more or longer ridges. Because larger variation of contrast is tolerated. By the way it does not seem to be so in the screenshots that I attach: one with the range 0-230 and the other with 200-230.
So what would be the correlation between the (number or length of the) fibers and the low and high contrast chosen?
All the best,
Asef