added test_blob

skimage/feature/tests/test_blob.py

@@ -0,0 +1,28 @@
+import numpy as np
+from skimage.draw import circle
+from skimage.feature import blob_dog
+
+
+def test_blob_dog():
+    img = np.ones((512, 512))
+
+    xs, ys = circle(400, 130, 5)
+    img[xs, ys] = 255
+
+    xs, ys = circle(100, 300, 25)
+    img[xs, ys] = 255
+
+    xs, ys = circle(200, 350, 30)
+    img[xs, ys] = 255
+
+    blobs = blob_dog(img)
+    coords = blobs[:, 0:2]
+
+    if coords[coords == [400, 130]].shape != (2,):
+        assert False
+
+    if coords[coords == [100, 300]].shape != (2,):
+        assert False
+
+    if coords[coords == [200, 350]].shape != (2,):
+        assert False