Using ImagePro to record the movement of soap film catenoid
Hi there,
I am a new user of ImagePro, and my goal is to quantify the movement of soap film under an electric field. In particular, I am looking at the profile of a soap film catenoid suspended between two rings.

The radii of curvature on both sides of the membrane profile fluctuates, and there are too many frames in my videos to go through manually and measure the maximum distances between membrane and outer boundary at the mid-plane.
This is a sample from one video. There is a rod in the middle (this was my electrode to create the electric field), but that is not involved in the video analysis. I want to determine how much the radius of curvature is changing on the left compared to on the right.

Please let me know if you need more information!
Thanks.
Answers
You can measure that using the Line profile tool: Create a horizontal line profile and add "Valley" edge detectors (if the boundary is a dark line, as on your picture), which will detect film boundaries, then just get positions of these markers (measurement: Origin - Valley) going through the time sequence. You can collect all these measurements automatically clicking the Collect button (with "All Frames" activated).
Regards,
Yuri