@@ -78,3 +78,11 @@ func EdgeDetection(img image.Image) image.Image {
 	r := effect.EdgeDetection(img, 1.0)
 	return r
 }
+func Grayscale(img image.Image) image.Image {
+	r := effect.Grayscale(img)
+	return r
+}
+func Emboss(img image.Image) image.Image {
+	r := effect.Emboss(img)
+	return r
+}

@@ -2,6 +2,7 @@ package main
 
 import (
 	"fmt"
+	"image"
 	"sort"
 )
 
@@ -82,22 +83,34 @@ }
 	}
 	return neighbours
 }
-func knn(dataset Dataset, input [][]float64) string {
+func knn(datasets []Dataset, imgInput image.Image) string {
 	k := 6
 	var neighbours []Neighbour
 	var neighboursED []Neighbour
+	var neighboursG []Neighbour
+
+	imgED := EdgeDetection(imgInput)
+	imgG := Grayscale(imgInput)
+
+	histogram := imageToHistogram(imgInput)
+	histogramED := imageToHistogram(imgED)
+	histogramG := imageToHistogram(imgG)
 
 	//get a key from map dataset, the key is a label
-	label := getMapKey(dataset)
+	label := getMapKey(datasets[0])
 	//fill the first k neighbours
 	for i := 0; i < k; i++ {
-		neighbours = append(neighbours, Neighbour{euclideanDist(dataset[label][0], input), label})
-		neighboursED = append(neighbours, Neighbour{euclideanDist(dataset[label][0], input), label})
+		neighbours = append(neighbours, Neighbour{euclideanDist(datasets[0][label][0], histogram), label})
+		neighboursED = append(neighboursED, Neighbour{euclideanDist(datasets[1][label][0], histogramED), label})
+		neighboursG = append(neighboursG, Neighbour{euclideanDist(datasets[2][label][0], histogramG), label})
 	}
 
-	neighbours = distNeighboursFromDataset(dataset, neighbours, input)
-	neighboursED = distNeighboursFromDataset(datasetED, neighbours, input)
-	neighbours = append(neighbours, neighboursED...)
+	neighbours = distNeighboursFromDataset(datasets[0], neighbours, histogram)
+	neighboursED = distNeighboursFromDataset(datasets[1], neighboursED, histogramED)
+	neighboursG = distNeighboursFromDataset(datasets[2], neighboursG, histogramG)
+
+	//neighbours = append(neighbours, neighboursED...)
+	neighbours = append(neighbours, neighboursG...)
 
 	for i := 0; i < len(neighbours); i++ {
 		fmt.Print(neighbours[i].Label + " - ")

@@ -8,22 +8,21 @@ "strconv"
 	"time"
 )
 
-//dataset := make(Dataset)
-var dataset Dataset
-var datasetED Dataset
+//array of datasets
+var datasets []Dataset
 
 func main() {
 	readConfig("./config.json")
 
 	c.Cyan("reading images datasets")
 	tStart := time.Now()
-	dataset, datasetED = readDataset("./dataset")
+	datasets = readDataset("./dataset")
 	fmt.Print("time spend reading images: ")
 	fmt.Println(time.Since(tStart))
-	fmt.Println("total folders scanned: " + strconv.Itoa(len(dataset)))
+	fmt.Println("total folders scanned: " + strconv.Itoa(len(datasets[0])))
 
 	numImages := 0
-	for _, v := range dataset {
+	for _, v := range datasets[0] {
 		numImages = numImages + len(v)
 	}
 	c.Cyan("total images in dataset: " + strconv.Itoa(numImages))

@@ -42,9 +42,11 @@ histogram := imageToHistogram(image)
 		return histogram
 	*/
 }
-func readDataset(path string) (Dataset, Dataset) {
+func readDataset(path string) []Dataset {
+	var resultDatasets []Dataset
 	dataset := make(Dataset)
 	datasetED := make(Dataset)
+	datasetG := make(Dataset)
 
 	folders, _ := ioutil.ReadDir(path)
 	for _, folder := range folders {
@@ -52,6 +54,7 @@ fmt.Println(folder.Name())
 
 		var imgDataset ImgDataset
 		var imgDatasetED ImgDataset
+		var imgDatasetG ImgDataset
 
 		folderFiles, _ := ioutil.ReadDir(path + "/" + folder.Name())
 		for _, file := range folderFiles {
@@ -65,12 +68,20 @@ imageED := EdgeDetection(image)
 			histogramED := imageToHistogram(imageED)
 			imgDatasetED = append(imgDatasetED, histogramED)
 
+			//get the image with Grayscale filter
+			imageG := Grayscale(image)
+			histogramG := imageToHistogram(imageG)
+			imgDatasetG = append(imgDatasetG, histogramG)
 		}
 
 		//add the foldername to the Dataset map
 		dataset[folder.Name()] = imgDataset
 		datasetED[folder.Name()] = imgDatasetED
+		datasetG[folder.Name()] = imgDatasetG
 	}
 
-	return dataset, datasetED
+	resultDatasets = append(resultDatasets, dataset)
+	resultDatasets = append(resultDatasets, datasetED)
+	resultDatasets = append(resultDatasets, datasetG)
+	return resultDatasets
 }

@@ -74,14 +74,9 @@ func NewImage(w http.ResponseWriter, r *http.Request) {
 	_, handler, err := r.FormFile("file")
 	check(err)
 
-	//imageName := strings.Split(handler.Filename, ".")[0]
-	//fileName := imageName + ".png"
-
-	//data, err := ioutil.ReadAll(file)
-	//check(err)
 	img := readImage(handler.Filename)
-	histogram := imageToHistogram(img)
-	result := knn(dataset, histogram)
+	//histogram := imageToHistogram(img)
+	result := knn(datasets, img)
 
 	c.Purple("seems to be a " + result)
 	fmt.Fprintln(w, "seems to be a "+result)