module ParasitesMarker2
open System.Drawing
+open System.Linq
open Emgu.CV
open Emgu.CV.Structure
+open Utils
+
type Result = {
darkStain: Image<Gray, byte>
- stain: Image<Gray, byte>
- infection: Image<Gray, byte> }
+ infection: Image<Gray, byte>
+ stain: Image<Gray, byte> }
// Create three binary markers :
// * 'Dark stain' corresponds to the colored pixel, it's independent of the size of the areas.
// * 'Stain' corresponds to the stain around the parasites.
// * 'Infection' corresponds to the parasite. It shouldn't contain thrombocytes.
-let find (filteredGreen: Image<Gray, byte>) (filteredGreenFloat: Image<Gray, float32>) (kmediansResult: KMedians.Result) (config: Config.Config) : Result * Image<Gray, byte> * Image<Gray, byte> =
+let find (filteredGreen: Image<Gray, byte>) (filteredGreenFloat: Image<Gray, float32>) (config: Config.Config) : Result * Image<Gray, byte> * Image<Gray, byte> =
+
+ let filteredGreenWithoutInfection = filteredGreen.Copy()
+ ImgTools.areaClose filteredGreenWithoutInfection (int config.InfectionArea)
+
+ let filteredGreenWithoutStain = filteredGreenWithoutInfection.Copy()
+ ImgTools.areaClose filteredGreenWithoutStain (int config.StainArea)
// We use the filtered image to find the dark stain.
- let { KMedians.fg = fg; KMedians.median_bg = median_bg; KMedians.median_fg = median_fg; KMedians.d_fg = d_fg } = kmediansResult
+ let kmediansResults = logTime "Finding fg/bg (k-medians)" (fun () -> KMedians.kmedians (filteredGreenWithoutInfection.Convert<Gray, float32>()) 1.0) // FIXME: avoid converting again this in MainAnalysis
+ let { KMedians.fg = fg; KMedians.median_bg = median_bg; KMedians.median_fg = median_fg; KMedians.d_fg = d_fg } = kmediansResults
let darkStain = d_fg.Cmp(median_bg * config.Parameters.darkStainLevel, CvEnum.CmpType.GreaterThan)
- darkStain._And(filteredGreenFloat.Cmp(median_fg, CvEnum.CmpType.LessThan))
+ darkStain._And(filteredGreenWithoutInfection.Cmp(median_fg, CvEnum.CmpType.LessThan))
- let marker (area: int) (threshold: float) : Image<Gray, byte> * Image<Gray, byte> =
- let closed = filteredGreen.Copy()
- ImgTools.areaClose closed area
- let diff = closed - filteredGreen
+ let marker (img: Image<Gray, byte>) (closed: Image<Gray, byte>) (level: float) : Image<Gray, byte> =
+ let diff = closed - img
let min = ref [| 0. |]
let minLocation = ref <| [| Point() |]
let max = ref [| 0. |]
let maxLocation = ref <| [| Point() |]
diff.MinMax(min, max, minLocation, maxLocation)
+ let max = (!max).[0]
+
+ let threshold = 0.2 * max
+ let diff' = diff - threshold
+
+ let m = MathNet.Numerics.Statistics.StreamingStatistics.Mean(seq {
+ for m in ImgTools.findMaxima diff' do
+ let p = m.First()
+ yield diff'.Data.[p.Y, p.X, 0] |> float }) + threshold
+
+ let valueThreshold = m * level
- diff._ThresholdBinary((!max).[0] * threshold |> Gray, Gray(255.))
- diff, closed
+ diff._ThresholdBinary(Gray(valueThreshold), Gray(255.))
+ diff
- let parasitesMarker, filteredGreenWithoutParasites = marker (int config.ParasiteArea) config.Parameters.infectionLevel
- let stainMarker, filteredGreenWithoutStain = marker (int config.StainArea) config.Parameters.stainLevel
+ let infectionMarker = marker filteredGreen filteredGreenWithoutInfection config.Parameters.infectionLevel
+ let stainMarker = marker filteredGreenWithoutInfection filteredGreenWithoutStain config.Parameters.stainLevel
{ darkStain = darkStain
- stain = parasitesMarker
- infection = stainMarker },
- filteredGreenWithoutParasites,
+ infection = infectionMarker
+ stain = stainMarker },
+ filteredGreenWithoutInfection,
filteredGreenWithoutStain