Reduce a bit the thickness of selected RBC

[master-thesis.git] / Parasitemia / ParasitemiaCore / Granulometry.fs

diff --git a/Parasitemia/ParasitemiaCore/Granulometry.fs b/Parasitemia/ParasitemiaCore/Granulometry.fs
index ed8bda6..ea5ef67 100644 (file)
--- a/Parasitemia/ParasitemiaCore/Granulometry.fs
+++ b/Parasitemia/ParasitemiaCore/Granulometry.fs
@@ -8,10 +8,15 @@ open Emgu.CV.Structure
 
 open Utils
 
-// 'range': a minimum and maximum radius.
-// 'scale': <= 1.0, to speed up the process.
-let findRadiusByClosing (img: Image<Gray, 'TDepth>) (range: int * int) (scale: float) : int =
-    use scaledImg = if scale = 1. then img else img.Resize(scale, CvEnum.Inter.Area)
+/// <summary>
+/// Granulometry by closing on the image 'img' by testing circle structrual elements with radius range in 'range'.
+/// </summary>
+/// <param name="img"></param>
+/// <param name="range">Minimum radius * maximum radius</param>
+/// <param name="scale">le 1.0, to speed up the process.</param>
+/// <param name="useOctagon"></param>
+let findRadiusByClosing (img : Image<Gray, 'TDepth>) (range : int * int) (scale : float) (useOctagon : bool) : int =
+    use scaledImg = if scale = 1. then img else img.Resize (scale, CvEnum.Inter.Area)
 
     let r1, r2 = range
     let r1', r2' = roundInt (float r1 * scale), roundInt (float r2 * scale)
@@ -20,14 +25,13 @@ let findRadiusByClosing (img: Image<Gray, 'TDepth>) (range: int * int) (scale: f
     let intensityImg = scaledImg.GetSum().Intensity
 
     // 's' must be odd.
-    let octagon (s: int) : Matrix<byte> =
+    let octagon (s : int) : Matrix<byte> =
         if s % 2 = 0 then failwith "s must be odd"
-        let m = new Matrix<byte>(Array2D.create s s 1uy)
+        let m = new Matrix<byte> (Array2D.create s s 1uy)
         let r = (float s) / (Math.Sqrt 2. + 2.) |> roundInt
-        for i in 0 .. r - 1 do
-            for j in 0 .. r - 1 do
-                if i + j < r
-                then
+        for i = 0 to r - 1 do
+            for j = 0 to r - 1 do
+                if i + j < r then
                     m.[i, j] <- 0uy
                     m.[s - i - 1, j] <- 0uy
                     m.[i, s - j - 1] <- 0uy
@@ -35,16 +39,18 @@ let findRadiusByClosing (img: Image<Gray, 'TDepth>) (range: int * int) (scale: f
         m
 
     let mutable previous_n = Double.NaN
-    for r in r1' .. r2' do
-        let se = CvInvoke.GetStructuringElement(CvEnum.ElementShape.Ellipse, Size(2 * r, 2 * r), Point(-1, -1))
-        //let se = octagon (2 * r - 1)
+    for r = r1' to r2' do
+        let se =
+            if useOctagon then
+                (octagon (2 * r - 1)).Mat // It doesn't speed up the process.
+            else
+                CvInvoke.GetStructuringElement (CvEnum.ElementShape.Ellipse, Size (2 * r, 2 * r), Point (-1, -1))
 
-        use closed = scaledImg.MorphologyEx(CvEnum.MorphOp.Close, se, Point(-1, -1), 1, CvEnum.BorderType.Replicate, MCvScalar(0.0))
+        use closed = scaledImg.MorphologyEx (CvEnum.MorphOp.Close, se, Point (-1, -1), 1, CvEnum.BorderType.Replicate, MCvScalar (0.0))
 
         let n = closed.GetSum().Intensity
 
-        if not (Double.IsNaN previous_n)
-        then
+        if not (Double.IsNaN previous_n) then
             patternSpectrum.[r - r1' - 1] <- abs (n - previous_n)
         previous_n <- n
 
@@ -52,18 +58,26 @@ let findRadiusByClosing (img: Image<Gray, 'TDepth>) (range: int * int) (scale: f
 
     float (max + r1') / scale |> roundInt
 
-let findRadiusByAreaClosing (img: Image<Gray, float32>) (range: int * int) : int =
-    let r1, r2 = range
+/// <summary>
+/// Granulometry by area closing on the image 'img' by testing the circle area into the given radius range.
+/// </summary>
+let findRadiusByAreaClosing (img : Image<Gray, float32>) (radiusRange : int * int) : int =
+    let r1, r2 = radiusRange
+
+    if r1 > r2 then
+        failwithf "'radiusRange' invalid : %O" radiusRange
 
-    use imgCopy = img.Copy()
+    use imgCopy = img.Copy ()
 
     let mutable maxDiff = 0.f
     let mutable max_r = r1
 
-    ImgTools.areaCloseFWithFun imgCopy [ for r in r1 .. r2 -> Math.PI * float r ** 2. |> roundInt, r ] (fun r diff ->
-        if r <> r1 && diff > maxDiff
-        then
-            maxDiff <- diff
-            max_r <- r - 1 )
+    Morpho.areaCloseFWithFun imgCopy [ for r in r1 .. r2 -> Math.PI * float r ** 2. |> roundInt, r ] (
+        fun r diff ->
+            if r <> r1 && diff > maxDiff then
+                maxDiff <- diff
+                max_r <- r - 1
+    )
+
     max_r