X-Git-Url: http://git.euphorik.ch/?p=master-thesis.git;a=blobdiff_plain;f=Parasitemia%2FParasitemiaCore%2FClassifier.fs;h=5a6dcbeed914e61d11fdaa9246beedee71ba82fd;hp=0bea08451e899f3cca981bc39037d043dce37c9c;hb=9343c4deb0bf88c58d9c92d465d8e99f64656875;hpb=4bfa3cbdc6145e6944f02e24829ab2ef3a851ac1 diff --git a/Parasitemia/ParasitemiaCore/Classifier.fs b/Parasitemia/ParasitemiaCore/Classifier.fs index 0bea084..5a6dcbe 100644 --- a/Parasitemia/ParasitemiaCore/Classifier.fs +++ b/Parasitemia/ParasitemiaCore/Classifier.fs @@ -10,24 +10,22 @@ open Emgu.CV.Structure open Types open Utils +type CellState = RBC = 1 | Removed = 2 | Peculiar = 3 type private EllipseFlaggedKd (e: Ellipse) = inherit Ellipse (e.Cx, e.Cy, e.A, e.B, e.Alpha) - member val Removed = false with get, set + member val State = CellState.RBC with get, set interface KdTree.I2DCoords with member this.X = this.Cx member this.Y = this.Cy - -let findCells (ellipses: Ellipse list) (parasites: ParasitesMarker.Result) (img: Image) (config: Config.Config) : Cell list = +let findCells (ellipses: Ellipse list) (parasites: ParasitesMarker.Result) (width: int) (height: int) (config: Config.Config) : Cell list = if ellipses.IsEmpty then [] else - let infection = parasites.infection.Copy() // To avoid to modify the parameter. - // This is the minimum window size to check if other ellipses touch 'e'. let searchRegion (e: Ellipse) = { KdTree.minX = e.Cx - (e.A + config.RBCRadius.Max) KdTree.maxX = e.Cx + (e.A + config.RBCRadius.Max) @@ -40,41 +38,55 @@ let findCells (ellipses: Ellipse list) (parasites: ParasitesMarker.Result) (img: let a = int (e.A + 0.5f) cx - a, cy - a, cx + a, cy + a - let w = img.Width - let w_f = float32 w - let h = img.Height - let h_f = float32 h - // Return 'true' if the point 'p' is owned by e. // The lines represents all intersections with other ellipses. - let pixelOwnedByE (p: PointD) (e: Ellipse) (others: (Ellipse * Line) list) = + let pixelOwnedByE (p: PointF) (e: EllipseFlaggedKd) (neighbors: (EllipseFlaggedKd * PointF * PointF) list) = e.Contains p.X p.Y && seq { - let c = PointD(e.Cx, e.Cy) - for e', d1 in others do - let d2 = Utils.lineFromTwoPoints c p - let c' = PointD(e'.Cx, e'.Cy) - let v = pointFromTwoLines d1 (lineFromTwoPoints c c') - let case1 = sign (v.X - c.X) <> sign (v.X - c'.X) || Utils.squaredDistanceTwoPoints v c > Utils.squaredDistanceTwoPoints v c' - if d2.Valid + let c = PointF(e.Cx, e.Cy) + + for e', d1 in neighbors + |> List.choose (fun (otherE, p1, p2) -> + if otherE.State = CellState.Removed + then None + else Some (otherE, Utils.lineFromTwoPoints p1 p2)) do + if e'.State = e.State // Peculiar vs peculiar or RBC vs RBC. then - let p' = Utils.pointFromTwoLines d1 d2 - // Yield 'false' when the point is owned by another ellipse. - if case1 + let d2 = lineFromTwoPoints c p + let c' = PointF(e'.Cx, e'.Cy) + let v = pointFromTwoLines d1 (lineFromTwoPoints c c') + let case1 = sign (v.X - c.X) <> sign (v.X - c'.X) || Utils.squaredDistanceTwoPoints v c > Utils.squaredDistanceTwoPoints v c' + if not (Single.IsInfinity d2.A) then - yield sign (c.X - p.X) <> sign (c.X - p'.X) || Utils.squaredDistanceTwoPoints c p' > Utils.squaredDistanceTwoPoints c p + let p' = Utils.pointFromTwoLines d1 d2 + let delta, delta' = + let dx1, dx2 = (c.X - p.X), (c.X - p'.X) + // To avoid rounding issue. + if abs dx1 < 0.01f || abs dx2 < 0.01f then c.Y - p.Y, c.Y - p'.Y else dx1, dx2 + + // Yield 'false' when the point is owned by another ellipse. + if case1 + then + yield sign delta <> sign delta' || Utils.squaredDistanceTwoPoints c p' > Utils.squaredDistanceTwoPoints c p + else + yield sign delta = sign delta' && Utils.squaredDistanceTwoPoints c p' < Utils.squaredDistanceTwoPoints c p else - yield sign (c.X - p.X) = sign (c.X - p'.X) && Utils.squaredDistanceTwoPoints c p' < Utils.squaredDistanceTwoPoints c p + yield case1 + + elif e.State = CellState.Peculiar // A peculiar always win against a RBC. + then + yield true else - yield case1 + yield not <| e'.Contains p.X p.Y + } |> Seq.forall id let ellipses = ellipses |> List.map EllipseFlaggedKd // 1) Associate touching ellipses with each ellipses and remove ellipse with more than two intersections. let tree = KdTree.Tree.BuildTree ellipses - let neighbors (e: EllipseFlaggedKd) : (EllipseFlaggedKd * PointD * PointD) list = - if not e.Removed + let neighbors (e: EllipseFlaggedKd) : (EllipseFlaggedKd * PointF * PointF) list = + if e.State <> CellState.Removed then tree.Search (searchRegion e) // We only keep the ellipses touching 'e'. @@ -83,26 +95,27 @@ let findCells (ellipses: Ellipse list) (parasites: ParasitesMarker.Result) (img: then match EEOver.EEOverlapArea e otherE with | Some (_, px, _) when px.Length > 2 -> - otherE.Removed <- true + otherE.State <- CellState.Removed None | Some (area, px, py) when area > 0.f && px.Length = 2 -> - Some (otherE, PointD(px.[0], py.[0]), PointD(px.[1], py.[1])) + Some (otherE, PointF(px.[0], py.[0]), PointF(px.[1], py.[1])) | _ -> None else - None ) + None) else [] - // We reverse the list to get the lower score ellipses first. - let ellipsesWithNeigbors = ellipses |> List.map (fun e -> e, neighbors e) |> List.rev + let ellipsesWithNeigbors = ellipses |> List.map (fun e -> e, neighbors e) // 2) Remove ellipses touching the edges. + let widthF, heightF = float32 width, float32 height for e in ellipses do - if e.isOutside w_f h_f then e.Removed <- true + if e.isOutside widthF heightF then e.State <- CellState.Removed // 3) Remove ellipses with a high standard deviation (high contrast). - let imgData = img.Data + // Obsolete. It was useful when the ellipses result quality wasn't good. + (* let imgData = img.Data let globalStdDeviation = MathNet.Numerics.Statistics.Statistics.PopulationStandardDeviation(seq { for y in 0 .. h - 1 do for x in 0 .. w - 1 do @@ -122,79 +135,118 @@ let findCells (ellipses: Ellipse list) (parasites: ParasitesMarker.Result) (img: yield float imgData.[y, x, 0] }) if stdDeviation > globalStdDeviation * config.Parameters.standardDeviationMaxRatio then - e.Removed <- true - + e.Removed <- true *) // 4) Remove ellipses with little area. let minArea = config.RBCRadius.MinArea for e, neighbors in ellipsesWithNeigbors do - if not e.Removed + if e.State <> CellState.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(float32 x, float32 y) - if pixelOwnedByE p e (neighbors |> List.choose (fun (otherE, p1, p2) -> if otherE.Removed then None else Some (otherE :> Ellipse, Utils.lineFromTwoPoints p1 p2))) + for y in (if minY < 0 then 0 else minY) .. (if maxY >= height then height - 1 else maxY) do + for x in (if minX < 0 then 0 else minX) .. (if maxX >= width then width - 1 else maxX) do + let p = PointF(float32 x, float32 y) + if pixelOwnedByE p e neighbors then area <- area + 1 if area < int minArea then - e.Removed <- true + e.State <- CellState.Removed + + // 5) Define non-rbc (peculiar) cells. + let darkStainData = parasites.darkStain.Data + ellipsesWithNeigbors + |> List.choose (fun (e, neighbors) -> + if e.State = CellState.Removed + then + None + else + let mutable darkStainPixels = 0 + let mutable nbElement = 0 + let minX, minY, maxX, maxY = ellipseWindow e + for y in minY .. maxY do + for x in minX .. maxX do + let p = PointF(float32 x, float32 y) + if pixelOwnedByE p e neighbors + then + nbElement <- nbElement + 1 + if darkStainData.[y, x, 0] > 0uy + then + darkStainPixels <- darkStainPixels + 1 + + if float darkStainPixels > config.Parameters.maxDarkStainRatio * (float nbElement) then Some e else None) + + // We do not change the state during the process to avoid to have peculiar neighbors which change the behavior of 'pixelOwnedByE'. + |> List.iter (fun e -> e.State <- CellState.Peculiar) // 5) Define pixels associated to each ellipse and create the cells. + let diameterParasiteSquared = (2.f * config.RBCRadius.ParasiteRadius) ** 2.f |> roundInt + let minimumParasiteArea = config.RBCRadius.MinimumParasiteArea |> roundInt + + let nucleusData = parasites.nucleus.Copy().Data // Will be modified thus the copy. + let parasiteData = parasites.parasite.Data + let darkStainData = parasites.darkStain.Data + ellipsesWithNeigbors |> List.choose (fun (e, neighbors) -> - if e.Removed + if e.State = CellState.Removed then None else let minX, minY, maxX, maxY = ellipseWindow e - let infectedPixels = List() - let mutable stainPixels = 0 - let mutable darkStainPixels = 0 + let nucleusPixels = List() + let parasitePixels = List() + let mutable nbElement = 0 let elements = new Matrix(maxY - minY + 1, maxX - minX + 1) for y in minY .. maxY do for x in minX .. maxX do - let p = PointD(float32 x, float32 y) - if pixelOwnedByE p e (neighbors |> List.choose (fun (otherE, p1, p2) -> if otherE.Removed then None else Some (otherE :> Ellipse, Utils.lineFromTwoPoints p1 p2))) + let p = PointF(float32 x, float32 y) + if pixelOwnedByE p e neighbors then - elements.[y-minY, x-minX] <- 1uy + elements.[y - minY, x - minX] <- 1uy nbElement <- nbElement + 1 - if infection.Data.[y, x, 0] > 0uy + if nucleusData.[y, x, 0] > 0uy then - infectedPixels.Add(Point(x, y)) + nucleusPixels.Add(Point(x, y)) - if parasites.stain.Data.[y, x, 0] > 0uy + if parasiteData.[y, x, 0] > 0uy then - stainPixels <- stainPixels + 1 + parasitePixels.Add(Point(x, y)) - if parasites.darkStain.Data.[y, x, 0] > 0uy - then - darkStainPixels <- darkStainPixels + 1 + let parasiteArea = + if nucleusPixels.Count > 0 + then + seq { + for parasitePixel in parasitePixels do + if nucleusPixels.Exists(fun p -> pown (p.X - parasitePixel.X) 2 + pown (p.Y - parasitePixel.Y) 2 <= diameterParasiteSquared) + then yield 1 } |> Seq.sum + else + 0 let cellClass = - if float darkStainPixels > config.Parameters.maxDarkStainRatio * (float nbElement) || - float stainPixels > config.Parameters.maxStainRatio * (float nbElement) + if e.State = CellState.Peculiar then Peculiar - elif infectedPixels.Count >= 1 + + elif nucleusPixels.Count > 0 && parasiteArea >= minimumParasiteArea then - let infectionToRemove = ImgTools.connectedComponents parasites.stain infectedPixels + let infectionToRemove = Morpho.connectedComponents parasites.parasite nucleusPixels for p in infectionToRemove do - infection.Data.[p.Y, p.X, 0] <- 0uy + nucleusData.[p.Y, p.X, 0] <- 0uy InfectedRBC + else HealthyRBC Some { cellClass = cellClass center = Point(roundInt e.Cx, roundInt e.Cy) - infectedArea = infectedPixels.Count - stainArea = stainPixels + nucleusArea = if cellClass = InfectedRBC then nucleusPixels.Count else 0 + parasiteArea = parasiteArea elements = elements })