- // Return 'true' if the point 'p' is owned by e.
- // The lines represents all intersections with other ellipses.
- let pixelOwnedByE (p: PointD) (e: Ellipse) (lines: Line list) =
- e.Contains p.X p.Y &&
- seq {
- let c = PointD(e.Cx, e.Cy)
- for d1 in lines do
- let d2 = Utils.lineFromTwoPoints c p
- let p' = Utils.pointFromTwoLines d1 d2
- yield sign (c.X - p.X) <> sign (c.X - p'.X) || Utils.squaredDistanceTwoPoints c p' > Utils.squaredDistanceTwoPoints c p // 'false' -> the point is owned by another ellipse.
- } |> Seq.forall id
+ // 4) Remove ellipses with little area.
+ let minArea = config.RBCMinArea
+ for e, neighbors in ellipsesWithNeigbors do
+ if not e.Removed
+ then
+ let minX, minY, maxX, maxY = ellipseWindow e
+
+ let mutable area = 0
+ for y in (if minY < 0 then 0 else minY) .. (if maxY >= h then h - 1 else maxY) do
+ for x in (if minX < 0 then 0 else minX) .. (if maxX >= w then w - 1 else maxX) do
+ let p = PointD(float x, float y)
+ if pixelOwnedByE p e (neighbors |> List.choose (fun (otherE, p1, p2) -> if otherE.Removed then None else Some (Utils.lineFromTwoPoints p1 p2)))
+ then
+ area <- area + 1