Brovey method and IHS method with weight

cmd/fus.go

@@ -17,6 +17,7 @@ var (
 	outputDir string
 	fusReport string
 	fusMethod int
+	weight    float32
 )
 
 var fusCmd = &cobra.Command{
@@ -41,7 +42,8 @@ var fusCmd = &cobra.Command{
 
 		err := fusion.Pansharpen(panImage, mssImage,
 			filepath.Join(outputDir, fusedTiff),
-			fusion.PansharpenMethod(fusMethod))
+			fusion.PansharpenMethod(fusMethod),
+			weight)
 		if err != nil {
 			logrus.Fatal(err)
 		}
@@ -66,7 +68,8 @@ func init() {
 	fusCmd.Flags().StringVarP(&mssImage, "mss", "m", "", "path to the MSS image")
 	fusCmd.Flags().StringVarP(&outputDir, "output", "o", "", "path to the output directory")
 	fusCmd.Flags().StringVarP(&paramsXML, "params", "x", "", "path to the XML file containing parameters for GDAL_Pansharpen")
-	fusCmd.Flags().IntVarP(&fusMethod, "method", "t", int(fusion.ESRI), "method to use for fusion (5: IHS, 3: ESRI)")
+	fusCmd.Flags().IntVarP(&fusMethod, "method", "t", int(fusion.ESRI), "method to use for fusion (5: IHS, 3: ESRI 1: brovey)")
+	fusCmd.Flags().Float32VarP(&weight, "weight", "w", 0.1, "weight of the MSS image in the fusion (0-1)")
 }
 
 func initFUSParams() {

pkg/fusion/fusion.go

@@ -12,6 +12,8 @@ import (
 	"starwiz.cn/sjy01/image-proc/pkg/utils"
 )
 
+// Reference: https://www.kaggle.com/code/resolut/panchromatic-sharpening
+
 type PansharpenMethod int
 
 const (
@@ -24,7 +26,7 @@ const (
 	GIHS
 )
 
-func Pansharpen(panTif, mssTif, fusTif string, method PansharpenMethod) error {
+func Pansharpen(panTif, mssTif, fusTif string, method PansharpenMethod, weight float32) error {
 	log.Infof("Pansharpening %s and %s", panTif, mssTif)
 	pan, err := utils.ReadTifftoMat(panTif)
 	if err != nil {
@@ -53,7 +55,9 @@ func Pansharpen(panTif, mssTif, fusTif string, method PansharpenMethod) error {
 	case ESRI:
 		fus = PansharpenESRI(*pan, BGRI[0], BGRI[1], BGRI[2], BGRI[3])
 	case IHS:
-		fus = PansharpenIHS(*pan, BGRI[0], BGRI[1], BGRI[2], BGRI[3])
+		fus = PansharpenIHS(*pan, BGRI[0], BGRI[1], BGRI[2], BGRI[3], weight)
+	case Brovey:
+		fus = PansharpenBrovey(*pan, BGRI[0], BGRI[1], BGRI[2], BGRI[3], weight)
 	default:
 		fus = PansharpenESRI(*pan, BGRI[0], BGRI[1], BGRI[2], BGRI[3])
 	}
@@ -102,9 +106,62 @@ func PansharpenSimpleBrovey(pan, B, G, R, I gocv.Mat) error {
 }
 
 func PansharpenBrovey(pan, B, G, R, I gocv.Mat, w float32) gocv.Mat {
+	pan.ConvertTo(&pan, gocv.MatTypeCV32F)
+	B.ConvertTo(&B, gocv.MatTypeCV32F)
+	G.ConvertTo(&G, gocv.MatTypeCV32F)
+	R.ConvertTo(&R, gocv.MatTypeCV32F)
+	I.ConvertTo(&I, gocv.MatTypeCV32F)
+
 	// DNF = (PAN - w*I)/(R*w + G*w + B*w)
-	var fus gocv.Mat
-	return fus
+	wI := gocv.NewMat()
+	I.CopyTo(&wI)
+	wI.MultiplyFloat(-1 * w)
+	defer wI.Close()
+	wR := gocv.NewMat()
+	R.CopyTo(&wR)
+	wR.MultiplyFloat(w)
+	defer wR.Close()
+	wG := gocv.NewMat()
+	G.CopyTo(&wG)
+	wG.MultiplyFloat(w)
+	defer wG.Close()
+	wB := gocv.NewMat()
+	B.CopyTo(&wB)
+	wB.MultiplyFloat(w)
+	defer wB.Close()
+
+	DNF := gocv.NewMat()
+	defer DNF.Close()
+	gocv.Add(pan, wI, &DNF)
+	gocv.Add(wR, wG, &wR)
+	gocv.Add(wR, wB, &wR)
+	gocv.Divide(DNF, wR, &DNF)
+
+	gocv.Multiply(R, DNF, &R)
+	gocv.Multiply(G, DNF, &G)
+	gocv.Multiply(B, DNF, &B)
+	gocv.Multiply(I, DNF, &I)
+
+	mss := gocv.NewMat()
+	mt := gocv.MatTypeCV16UC3
+	switch config.GCONFIG.CoRegistration.FUSBandOrder {
+	case "RGB":
+		gocv.Merge([]gocv.Mat{R, G, B}, &mss)
+	case "BGR":
+		gocv.Merge([]gocv.Mat{B, G, R}, &mss)
+	case "RGBI":
+		gocv.Merge([]gocv.Mat{R, G, B, I}, &mss)
+		mt = gocv.MatTypeCV16UC4
+	case "BGRI":
+		gocv.Merge([]gocv.Mat{B, G, R, I}, &mss)
+		mt = gocv.MatTypeCV16UC4
+	default:
+		gocv.Merge([]gocv.Mat{R, G, B}, &mss)
+	}
+
+	mss.ConvertTo(&mss, mt)
+
+	return mss
 }
 
 func PansharpenSimpleMean(pan, B, G, R, I gocv.Mat) error { return nil }
@@ -157,7 +214,7 @@ func PansharpenESRI(pan, B, G, R, I gocv.Mat) gocv.Mat {
 	return mss
 }
 
-func PansharpenIHS(pan, B, G, R, I gocv.Mat) gocv.Mat {
+func PansharpenIHS(pan, B, G, R, I gocv.Mat, w float32) gocv.Mat {
 	mss := gocv.NewMat()
 	gocv.Merge([]gocv.Mat{B, G, R}, &mss)
 	mssHLS := gocv.NewMat()
@@ -179,7 +236,9 @@ func PansharpenIHS(pan, B, G, R, I gocv.Mat) gocv.Mat {
 	gocv.Normalize(hlsFloat, &hlsFloat, 0, 65535, gocv.NormMinMax)
 
 	// 替换亮度分量
-	hlsChannels[1] = panFloat
+	I.ConvertTo(&I, gocv.MatTypeCV32F)
+	I.MultiplyFloat(-1 * w)
+	gocv.Add(panFloat, I, &hlsChannels[1])
 
 	// 合并通道
 	gocv.Merge(hlsChannels, &mssHLS)

pkg/producer/scenes.go

@@ -242,7 +242,7 @@ func (r *Registrator) SaveScenesToTiff(panScenes []*Scene, mssScenes []*Scene) e
 func (r *Registrator) DoScenePansharpen(panScenes []*Scene, mssScenes []*Scene) error {
 	for i := 0; i < len(panScenes); i++ {
 		fusedTiff := strings.Replace(mssScenes[i].Tiff, "MSS", "FUS", -1)
-		err := fusion.Pansharpen(panScenes[i].Tiff, mssScenes[i].Tiff, fusedTiff, fusion.ESRI)
+		err := fusion.Pansharpen(panScenes[i].Tiff, mssScenes[i].Tiff, fusedTiff, fusion.ESRI, 0.1)
 		if err != nil {
 			return err
 		}