OK, after playing around with it more I found out that vote_threshold has little effect if any, and stepsize makes the biggest difference. Here’s a run with some results:
julia> hough_transform_standard(tf, max_linecount = 3, stepsize = 2)
3-element Array{Tuple{Float64,Float64},1}:
(1059.0, 0.6204604563369107)
(1053.0, 0.6286459504838356)
(1059.0, 0.6253717528250656)
Although I’m not entirely sure if that’s what I want… I’ll try to correlate that to the line’s endpoints.