Instead of just using static red lines to indicate the discovered straight lines or circle, use a pseudo-animated color rotation by updating the redrawing the same lines several times per second with different colors. This avoids the problem of the red lines possibly clashing the red in the underlying photo.
Instead of just using static red lines to indicate the discovered straight lines or circle, use a pseudo-animated color rotation by updating the redrawing the same lines several times per second with different colors. This avoids the problem of the red lines possibly clashing the red in the underlying photo.