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Updated hyperparameter settings and function calls

This commit is contained in:
Russell Stanley 2022-01-05 11:19:31 +10:30
parent e65a664a80
commit 5bffb7e964
2 changed files with 26 additions and 30 deletions
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11
turbidity/main.go
View File

@ -34,14 +34,13 @@ func main() {
}
// Create turbidity sensor.
ts := TurbiditySensor{template: template, standard: standard, k1: 90, k2: 90, scale: 5.0, alpha: 1.0}
ts := TurbiditySensor{template: template, standard: standard, k1: 8, k2: 8, sobelFilterSize: 3, scale: 1.0, alpha: 1.0}
var finalRes Results
finalRes.new(nImages)
// Score each image by calculating the average score from camera burst.
for i := range imgs {
// Evaluate camera burst.
sample_result, err := ts.Evaluate(imgs[i])
if err != nil {
@ -49,7 +48,7 @@ func main() {
}
// Add the average result from camera burst.
finalRes.update(average(sample_result.saturation), average(sample_result.contrast), float64(i*10), i)
finalRes.update(average(sample_result.saturation), average(sample_result.contrast), float64(i)*2.5, i)
}
// Plot the final results.
@ -106,12 +105,12 @@ func plotResults(x, saturation, contrast []float64) error {
err := plotToFile(
"Results",
"Turbidity (Almond Milk) (ml)",
"Almond Milk (ml)",
"Score",
func(p *plot.Plot) error {
return plotutil.AddLinePoints(p,
"AMEE", plotterXY(x, contrast),
"EME", plotterXY(x, saturation),
"Contrast", plotterXY(x, contrast),
"Saturation", plotterXY(x, saturation),
)
},
)

45
turbidity/turbidity.go
View File

@ -11,9 +11,9 @@ import (
// Turbidity Sensor.
type TurbiditySensor struct {
template, standard gocv.Mat
k1, k2 int //block size
alpha, scale float64
template, standard gocv.Mat
k1, k2, sobelFilterSize int
alpha, scale float64
}
// Given a slice of test images, return the sharpness and contrast scores.
@ -31,46 +31,43 @@ func (ts TurbiditySensor) Evaluate(imgs []gocv.Mat) (Results, error) {
}
// Apply sobel filter.
edge := ts.Sobel(marker, ts.scale)
gocv.IMWrite("marker.jpg", marker)
gocv.IMWrite("edge.jpg", edge)
edge := ts.Sobel(marker)
// Evaluate image.
out, err := ts.EvaluateImage(marker, edge, ts.k1, ts.k2, ts.alpha)
scores, err := ts.EvaluateImage(marker, edge)
if err != nil {
return result, err
}
result.update(out[0], out[1], float64(i*10), i)
result.update(scores[0], scores[1], float64(i*10), i)
}
return result, nil
}
// Evaluate image sharpness and contrast using blocks of size k1 by k2. Return a slice of the respective scores.
func (ts TurbiditySensor) EvaluateImage(img, edge gocv.Mat, k1, k2 int, alpha float64) ([]float64, error) {
func (ts TurbiditySensor) EvaluateImage(img, edge gocv.Mat) ([]float64, error) {
result := make([]float64, 2) // [0.0, 0.0]
if img.Rows()%k1 != 0 || img.Cols()%k2 != 0 {
return nil, fmt.Errorf("Dimensions not compatible (%v, %v)", k1, k2)
if img.Rows()%ts.k1 != 0 || img.Cols()%ts.k2 != 0 {
return nil, fmt.Errorf("Dimensions not compatible (%v, %v)", ts.k1, ts.k2)
}
lStep := int(img.Rows() / k1)
kStep := int(img.Cols() / k2)
lStep := int(img.Rows() / ts.k1)
kStep := int(img.Cols() / ts.k2)
for l := 0; l < img.Rows(); l = l + lStep {
for k := 0; k < img.Cols(); k = k + kStep {
// Enhancement Measure Estimation (EME), provides a measure of the sharpness.
err := ts.EvaluateBlock(edge, l, k, l+lStep, k+kStep, result, "EME", alpha)
err := ts.EvaluateBlock(edge, l, k, l+lStep, k+kStep, result, "EME", ts.alpha)
if err != nil {
return nil, err
}
// AMEE, provides a measure of the contrast.
err = ts.EvaluateBlock(img, l, k, l+lStep, k+kStep, result, "AMEE", alpha)
err = ts.EvaluateBlock(img, l, k, l+lStep, k+kStep, result, "AMEE", ts.alpha)
if err != nil {
return nil, err
}
@ -78,22 +75,22 @@ func (ts TurbiditySensor) EvaluateImage(img, edge gocv.Mat, k1, k2 int, alpha fl
}
// EME.
result[0] = 2.0 / (float64(k1) * float64(k2)) * result[0]
result[0] = 2.0 / (float64(ts.k1) * float64(ts.k2)) * result[0]
// AMEE.
result[1] = -1.0 / (float64(k1) * float64(k2)) * result[1]
result[1] = -1.0 / (float64(ts.k1) * float64(ts.k2)) * result[1]
return result, nil
}
// Evaluate a block within an image and add to to the result slice.
func (ts TurbiditySensor) EvaluateBlock(img gocv.Mat, l1, k1, l2, k2 int, result []float64, operation string, alpha float64) error {
func (ts TurbiditySensor) EvaluateBlock(img gocv.Mat, xStart, yStart, xEnd, yEnd int, result []float64, operation string, alpha float64) error {
max := -math.MaxFloat64
min := math.MaxFloat64
for i := l1; i < l2; i++ {
for j := k1; j < k2; j++ {
for i := xStart; i < xEnd; i++ {
for j := yStart; j < yEnd; j++ {
value := float64(img.GetUCharAt(i, j))
@ -150,15 +147,15 @@ func (ts TurbiditySensor) Transform(img gocv.Mat) (gocv.Mat, error) {
}
// Apply sobel filter to an image with a given scale and return the result.
func (ts TurbiditySensor) Sobel(img gocv.Mat, scale float64) gocv.Mat {
func (ts TurbiditySensor) Sobel(img gocv.Mat) gocv.Mat {
dx := gocv.NewMat()
dy := gocv.NewMat()
sobel := gocv.NewMat()
// Apply filter.
gocv.Sobel(img, &dx, gocv.MatTypeCV64F, 0, 1, 3, scale, 0.0, gocv.BorderConstant)
gocv.Sobel(img, &dy, gocv.MatTypeCV64F, 1, 0, 3, scale, 0.0, gocv.BorderConstant)
gocv.Sobel(img, &dx, gocv.MatTypeCV64F, 0, 1, ts.sobelFilterSize, ts.scale, 0.0, gocv.BorderConstant)
gocv.Sobel(img, &dy, gocv.MatTypeCV64F, 1, 0, ts.sobelFilterSize, ts.scale, 0.0, gocv.BorderConstant)
// Convert to unsigned.
gocv.ConvertScaleAbs(dx, &dx, 1.0, 0.0)