added script to show lowest image (laplacian) variance from folder (dataset)

src/imgvar.py

@@ -0,0 +1,38 @@
+import cv2
+import numpy as np
+import os
+from imutils import paths
+import argparse
+
+
+def variance_of_laplacian(image):
+	return cv2.Laplacian(image, cv2.CV_64F).var()
+
+
+def minVarInFolder(path):
+	minVar = 90000
+	minPath=""
+	files = os.listdir(path)
+	for p in files:
+		if ".png" in p and ".mask" not in p:
+			print(path+p)
+			img = cv2.imread(path+p)
+			cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
+			var = variance_of_laplacian(img)
+			if var < minVar:
+				minPath = path+p
+				minVar = var
+	return minPath,minVar
+
+ap = argparse.ArgumentParser()
+ap.add_argument("-i", "--images", required=True,
+	help="path to image")
+args = vars(ap.parse_args())
+
+path = args["images"]
+
+#img = cv2.imread(path)
+#cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
+#var = variance_of_laplacian(img)
+
+print(minVarInFolder(path))