Outlining the points from the colored image/video






i would like to outline the bump created by the (force) of my step using grasshopper i have shown each different bump emerged by my one single step in screenshots

i want to create a point/curve .whenever I change the image it should follow the outline of the bump

i’ve been seen some of image sample component videos but i belive i may have to use something more than that such as (editing the image in photoshop , installing the new extensions, watching some more tutorials)

kindly share any tutroial video/link if u think that could help me
i am abeginner grasshopper user
i have shown some images

sorry this is so far the best way that i could explain my concept and what i want

this video is taken while waking by the beach and edited (high saturation and slow motion)
thank you,..