Parasitemia/ParasitemiaCore/Types.fs

   1 module ParasitemiaCore.Types
   2
   3 open System
   4 open System.Drawing
   5 open System.Collections.Generic
   6
   7 open Emgu.CV
   8 open Emgu.CV.Structure
   9
  10 open Const
  11
  12 type Points = HashSet<Point>
  13
  14 type Ellipse (cx : float32, cy : float32, a : float32, b : float32, alpha : float32) =
  15     member this.Cx = cx
  16     member this.Cy = cy
  17     member this.A = a
  18     member this.B = b
  19     member this.Alpha = alpha
  20     member this.Area = a * b * PI
  21
  22     // Does the ellipse contain the point (x, y)?
  23     member this.Contains x y =
  24         ((x - cx) * cos alpha + (y - cy) * sin alpha) ** 2.f / a ** 2.f + ((x - cx) * sin alpha - (y - cy) * cos alpha) ** 2.f / b ** 2.f <= 1.f
  25
  26     member this.CutAVericalLine (y : float32) : bool =
  27         a ** 2.f + b ** 2.f - 2.f * y ** 2.f + 4.f * y * cx - 2.f * cx ** 2.f + a ** 2.f * cos (2.f * alpha) - b ** 2.f * cos (2.f * alpha) > 0.f
  28
  29     member this.CutAnHorizontalLine (x : float32) : bool =
  30         a ** 2.f + b ** 2.f - 2.f * x ** 2.f + 4.f * x * cy - 2.f * cy ** 2.f - a ** 2.f * cos (2.f * alpha) + b ** 2.f * cos (2.f * alpha) > 0.f
  31
  32     member this.IsOutside (width : float32) (height : float32) =
  33         this.Cx < 0.f || this.Cx >= width ||
  34         this.Cy < 0.f || this.Cy >= height ||
  35         this.CutAVericalLine 0.f || this.CutAVericalLine width ||
  36         this.CutAnHorizontalLine 0.f || this.CutAnHorizontalLine height
  37
  38     member this.Scale (factor : float32) : Ellipse =
  39         Ellipse(this.Cx, this.Cy, this.A * factor, this.B * factor, alpha)
  40
  41     // Approximation of Ramanujan.
  42     member this.Perimeter =
  43         PI * (3.f * (this.A + this.B) - sqrt ((3.f * this.A + this.B) * (this.A + 3.f * this.B)))
  44
  45     override this.ToString () =
  46         sprintf "(cx: %f, cy: %f, a: %f, b: %f, alpha: %f)" this.Cx this.Cy this.A this.B this.Alpha
  47
  48 type CellClass = HealthyRBC | InfectedRBC | Peculiar
  49
  50 type Cell =
  51     {
  52         cellClass : CellClass
  53         center : Point
  54         nucleusArea : int
  55         parasiteArea : int
  56         elements : Matrix<byte>
  57     }
  58
  59 [<Struct>]
  60 type Line (a : float32, b : float32) =
  61     member this.A = a
  62     member this.B = b
  63
  64 type MaybeBuilder () =
  65     member this.Bind (x, f) =
  66         match x with
  67         | None -> None
  68         | Some a -> f a
  69
  70     member this.ReturnFrom x = x
  71
  72     member this.TryFinally (body, compensation) =
  73         try
  74             this.ReturnFrom(body())
  75         finally
  76             compensation()
  77
  78     member this.Using (disposable : 'a when 'a :> IDisposable, body) =
  79         let body' = fun () -> body disposable
  80         this.TryFinally(body', fun () ->
  81             match disposable with
  82             | null -> ()
  83             | disp -> disp.Dispose())
  84
  85     member this.Zero () =
  86         None
  87
  88     member this.Return x =
  89         Some x
  90
  91 let maybe = MaybeBuilder()
  92
  93 type Result<'a> =
  94     | Success of 'a
  95     | Fail of string // Error message.
  96
  97 type ResultBuilder () =
  98     member this.Bind (res, f) =
  99         match res with
 100         | Success value -> f value
 101         | fail -> fail
 102
 103     member this.ReturnFrom (x) = x
 104
 105 let result = ResultBuilder()