add smile detection

Class/detection/utils/preprocessor.py

@@ -0,0 +1,29 @@
+import numpy as np
+from PIL import Image
+import numpy as np
+from imageio import imread
+
+def preprocess_input(x, v2=True):
+    x = x.astype('float32')
+    x = x / 255.0
+    if v2:
+        x = x - 0.5
+        x = x * 2.0
+    return x
+
+
+def _imread(image_name):
+        return imread(image_name)
+
+
+def _imresize(image_array, size):
+    return np.array(Image.fromarray(image_array).resize(size))
+        # return imresize(image_array, size)
+
+
+def to_categorical(integer_classes, num_classes=2):
+    integer_classes = np.asarray(integer_classes, dtype='int')
+    num_samples = integer_classes.shape[0]
+    categorical = np.zeros((num_samples, num_classes))
+    categorical[np.arange(num_samples), integer_classes] = 1
+    return categorical