How to fill polygon in image

Question

I've a closed contour region on an image. How to fill it up with white color? Not sure whats the Julia function for fillpoly(..)? Thanks

black background img with thin white circle, contour=findall(img.>0) img_With_contour_filled_with_white=..

Answer 1

Original Img	Filled Img

code:

using Images

img = load("img.png")

function fill_poly!(img::Matrix{RGB{N0f8}})
  bit_cols = all.(==(RGB(1., 1., 1.)), eachcol(img)) .== 0
  idx_cols = findall(bit_cols)
  f = findfirst.(!=(RGB(1., 1., 1.)), eachcol(img[:, bit_cols]))
  l = findlast.(!=(RGB(1., 1., 1.)), eachcol(img[:, bit_cols]))
  foreach(x->img[x[1]:x[2], x[3]].=RGB(0., 0., 0.), zip(f, l, idx_cols))
end;

fill_poly!(img)

Known issue: fills areas like the following