Extract parameters from poly-line

[Yuto Ushiki]

Hi,

I am trying to observe cell movements using PIVlab3.01.

I would like to analyze the movements of cells by using “Extract parameters from poly-line” in “Extractions”.  

What kind of results can I get with “Extract parameters from poly-line”?

For example, if I select “Circle” in “Extract parameters from poly-line” and “Magnitude”, what part of the circle “Magnitude” will be obtained? Is it inside the circle? Or on the circumference of the circle?

Regards

Yuto

[thielickeoptolution]

Hi,

Extract parameters from poly-line will only report results on the line / circle /rectangle.

Extract parameters from area will report results that are inside the circle / rectangle.

Magnitude in PIVlab is defined as the velocity magnitude (vector sum of the velocity in x and the velocity in y).

[Yuto Ushiki]

I appreciate your fast response!
But I have one more question. What does the parameter "Vector direction" mean? I assume it means angle, because it is expressed in units of "degrees".

2024年6月10日月曜日 19:41:29 UTC+9 thielickeoptolution:

[William Thielicke (Shrediquette)]

Yes, it means the angle with respect to the horizontal. Is "vector direction" a confusing name? Should I rename this?

[Yuto Ushiki]

Thanks!

The explanation was easy to understand and very helpful.

However, there is still something I don't understand when using PIVlab. 

What does the parameter "Tangent velocity" mean? How is it calculated?

2024年6月13日木曜日 13:33:55 UTC+9 William Thielicke (Shrediquette):