Creat interactive toolbox for image processing

Hi experts,

I have a sequence of images (hundreds) like one above, I want to build a interactive tool to draw a line (redline in the image) for the first image, and apply for the rest of images, then tracing the object above the line with bwtraceboundary after change image to black-white.

Can anyone suggest the idea or functions to do this?

Thank you!

Answer 1

[Image Analyst]

See my attached contact angle demo.

Note in the code where I find the black baseline at the bottom of the droplet. Adapt as needed.