Interface GetBorderPointsOptions

Whether to use 8-connectivity instead of 4-connectivity when detecting border pixels. When false, a pixel is considered a border only if at least one of its 4 orthogonal neighbors (up, down, left, right) is unset. When true, diagonal neighbors are also considered, so a pixel touching an unset pixel only by a corner is also returned as a border point.

Whether to include borders around holes inside the mask. When false, the mask is solid-filled before processing, so only the outer contour is returned. When true, pixels bordering interior holes are returned as well.