From d994e946781ccbc310722f56d70d43c007f8484e Mon Sep 17 00:00:00 2001
From: Russell Stanley <russell@ausocean.org>
Date: Fri, 17 Dec 2021 16:33:31 +1030
Subject: [PATCH] Split files and improved implementation

---
 turbidity/main.go    | 130 +++++++++++++++++++++++++++++++++++++++++++
 turbidity/results.go |  19 +++++++
 2 files changed, 149 insertions(+)
 create mode 100644 turbidity/main.go
 create mode 100644 turbidity/results.go

diff --git a/turbidity/main.go b/turbidity/main.go
new file mode 100644
index 00000000..f5cc1874
--- /dev/null
+++ b/turbidity/main.go
@@ -0,0 +1,130 @@
+package main
+
+import (
+	"fmt"
+
+	"gonum.org/v1/plot"
+	"gonum.org/v1/plot/plotter"
+	"gonum.org/v1/plot/plotutil"
+	"gonum.org/v1/plot/vg"
+
+	"gocv.io/x/gocv"
+)
+
+func main() {
+	n := 10
+
+	// Load template
+	template := gocv.IMRead("template.jpg", gocv.IMReadGrayScale)
+
+	// Read images
+	images := make([]gocv.Mat, n)
+
+	for i := 0; i < n; i++ {
+		images[i] = gocv.IMRead(fmt.Sprintf("images/generation-5/000%v.jpg", i), gocv.IMReadGrayScale)
+	}
+
+	// Calulate turbidity
+	ts := TurbiditySensor{template: template, k1: 90, k2: 90, scale: 5.0, alpha: 1.0}
+
+	err := ts.Evaluate(n, images)
+	if err != nil {
+		fmt.Println(err)
+	}
+}
+
+// RESULTS
+type Results struct {
+	turbidity  []float64
+	saturation []float64
+	contrast   []float64
+}
+
+func (r *Results) New(n int) {
+	r.turbidity = make([]float64, n)
+	r.saturation = make([]float64, n)
+	r.contrast = make([]float64, n)
+}
+
+func (r *Results) Append(saturation, contrast, turbidity float64, i int) {
+	r.saturation[i] = saturation
+	r.contrast[i] = contrast
+	r.turbidity[i] = turbidity
+}
+
+func Normalize(slice []float64, n int) []float64 {
+
+	max := -1e10
+	min := 1e10
+
+	out := make([]float64, n)
+
+	if n <= 1 {
+		return slice
+	}
+
+	for i := 0; i < n; i++ {
+		if slice[i] > max {
+			max = slice[i]
+		}
+		if slice[i] < min {
+			min = slice[i]
+		}
+	}
+
+	for i := 0; i < n; i++ {
+		out[i] = (slice[i] - min) / (max - min)
+	}
+
+	return out
+}
+
+// PLOTTING
+
+func PlotResults(x, saturation, contrast []float64) error {
+	err := plotToFile(
+		"Results",
+		"Filter Size",
+		"Score",
+		func(p *plot.Plot) error {
+			return plotutil.AddLinePoints(p,
+				"AMEE", plotterXY(x, contrast),
+				"EME", plotterXY(x, saturation),
+			)
+		},
+	)
+	if err != nil {
+		return fmt.Errorf("Could not plot results: %v", err)
+	}
+	return nil
+}
+
+// plotToFile creates a plot with a specified name and x&y titles using the
+// provided draw function, and then saves to a PNG file with filename of name.
+func plotToFile(name, xTitle, yTitle string, draw func(*plot.Plot) error) error {
+	p := plot.New()
+
+	p.Title.Text = name
+	p.X.Label.Text = xTitle
+	p.Y.Label.Text = yTitle
+
+	err := draw(p)
+	if err != nil {
+		return fmt.Errorf("could not draw plot contents: %w", err)
+	}
+
+	if err := p.Save(15*vg.Centimeter, 15*vg.Centimeter, "plots/"+name+".png"); err != nil {
+		return fmt.Errorf("could not save plot: %w", err)
+	}
+	return nil
+}
+
+// plotterXY provides a plotter.XYs type value based on the given x and y data.
+func plotterXY(x, y []float64) plotter.XYs {
+	xy := make(plotter.XYs, len(x))
+	for i := range x {
+		xy[i].X = x[i]
+		xy[i].Y = y[i]
+	}
+	return xy
+}
diff --git a/turbidity/results.go b/turbidity/results.go
new file mode 100644
index 00000000..be3f58b2
--- /dev/null
+++ b/turbidity/results.go
@@ -0,0 +1,19 @@
+package main
+
+type Results struct {
+	turbidity  []float64
+	saturation []float64
+	contrast   []float64
+}
+
+func (r *Results) New(n int) {
+	r.turbidity = make([]float64, n)
+	r.saturation = make([]float64, n)
+	r.contrast = make([]float64, n)
+}
+
+func (r *Results) Append(saturation, contrast, turbidity float64, i int) {
+	r.saturation[i] = saturation
+	r.contrast[i] = contrast
+	r.turbidity[i] = turbidity
+}
\ No newline at end of file