Wrote a script to write test results to a text file

mini_proj/test_nn.py

@@ -0,0 +1,15 @@
+import numpy as np
+from keras.models import Model
+from keras.utils import to_categorical
+
+pred_y = np.load("predicted_results.npy")
+test_y = np.load("Waldo_test_lbl.npy")
+
+test_y = to_categorical(test_y)
+
+f = open("test_output.txt", 'w')
+
+for i in range(0, len(test_y)):
+    print(pred_y[i], test_y[i], file=f)
+
+f.close()

mini_proj/waldo_model.py

@@ -37,12 +37,12 @@ def FCN():
     m_pool2 = MaxPooling2D(pool_size=(2, 2))(conv2)
 
     conv3 = Conv2D(32, (3, 3), activation='relu', padding='same')(m_pool2)
-    # drop2 = Dropout(0.2)(conv3) # Drop some portion of features to prevent overfitting
-    # m_pool2 = MaxPooling2D(pool_size=(2, 2))(drop2)
+    drop2 = Dropout(0.2)(conv3) # Drop some portion of features to prevent overfitting
+    m_pool2 = MaxPooling2D(pool_size=(2, 2))(drop2)
 
     # conv4 = Conv2D(64, (2, 2), activation='relu', padding='same')(m_pool2)
 
-    flat = Flatten()(conv3)                             # Makes data 1D
+    flat = Flatten()(m_pool2)                             # Makes data 1D
     dense = Dense(64, activation='relu')(flat)         # Fully connected layer
     drop3 = Dropout(0.2)(dense)
     classif = Dense(2, activation='sigmoid')(drop3)    # Final layer to classify
@@ -50,26 +50,55 @@ def FCN():
     ## Define the model structure
     model = Model(inputs=inputs, outputs=classif)
     # Optimizer recommended Adadelta values (lr=0.01)
-    model.compile(optimizer=Adam(), loss='binary_crossentropy', metrics=[f_measure])  
+    model.compile(optimizer=Adam(), loss='binary_crossentropy', metrics=['accuracy', f1])  
 
     return model
 
-def precision(y_true, y_pred):
-    y_pred = np.round(y_pred)
-    num = np.sum(np.logical_and(y_true, y_pred))
-    den = np.sum(y_pred)
-    return np.divide(num, den)
+def f1(y_true, y_pred):
+    def recall(y_true, y_pred):
+        """Recall metric.
 
-def recall(y_true, y_pred):
-    y_pred = np.round(y_pred)
-    num = np.sum(np.logical_and(y_true, y_pred))
-    den = np.sum(y_true)
-    return np.divide(num, den)
+        Only computes a batch-wise average of recall.
 
-def f_measure(y_true, y_pred):
-    p = precision(y_true, y_pred)
-    r = recall(y_true, y_pred)
-    return 2 * p * r / (p + r)
+        Computes the recall, a metric for multi-label classification of
+        how many relevant items are selected.
+        """
+        true_positives = K.sum(K.round(K.clip(y_true * y_pred, 0, 1)))
+        possible_positives = K.sum(K.round(K.clip(y_true, 0, 1)))
+        recall = true_positives / (possible_positives + K.epsilon())
+        return recall
+
+    def precision(y_true, y_pred):
+        """Precision metric.
+
+        Only computes a batch-wise average of precision.
+
+        Computes the precision, a metric for multi-label classification of
+        how many selected items are relevant.
+        """
+        true_positives = K.sum(K.round(K.clip(y_true * y_pred, 0, 1)))
+        predicted_positives = K.sum(K.round(K.clip(y_pred, 0, 1)))
+        precision = true_positives / (predicted_positives + K.epsilon())
+        return precision
+    precision = precision(y_true, y_pred)
+    recall = recall(y_true, y_pred)
+    return 2*((precision*recall)/(precision+recall+K.epsilon()))
+# def precision(y_true, y_pred):
+#     y_pred = K.round(y_pred)
+#     num = K.sum(tf.logical_and(y_true, y_pred))
+#     den = K.sum(y_pred)
+#     return K.divide(num, den)
+
+# def recall(y_true, y_pred):
+#     y_pred = K.round(y_pred)
+#     num = K.sum(tf.logical_and(y_true, y_pred))
+#     den = K.sum(y_true)
+#     return K.divide(num, den)
+
+# def f_measure(y_true, y_pred):
+#     p = precision(y_true, y_pred)
+#     r = recall(y_true, y_pred)
+#     return 2 * p * r / (p + r)
 
 ## Open data
 im_train = np.load('Waldo_train_data.npy')