mAP recorded during training

test.py

@@ -11,7 +11,7 @@ parser.add_argument('-data_config_path', type=str, default='cfg/coco.data', help
 parser.add_argument('-weights_path', type=str, default='weights/yolov3.pt', help='path to weights file')
 parser.add_argument('-class_path', type=str, default='data/coco.names', help='path to class label file')
 parser.add_argument('-iou_thres', type=float, default=0.5, help='iou threshold required to qualify as detected')
-parser.add_argument('-conf_thres', type=float, default=0.5, help='object confidence threshold')
+parser.add_argument('-conf_thres', type=float, default=0.3, help='object confidence threshold')
 parser.add_argument('-nms_thres', type=float, default=0.45, help='iou threshold for non-maximum suppression')
 parser.add_argument('-n_cpu', type=int, default=0, help='number of cpu threads to use during batch generation')
 parser.add_argument('-img_size', type=int, default=416, help='size of each image dimension')
@@ -21,9 +21,11 @@ print(opt)
 cuda = torch.cuda.is_available()
 device = torch.device('cuda:0' if cuda else 'cpu')
 
+
+def main(opt):
     # Configure run
     data_config = parse_data_config(opt.data_config_path)
-num_classes = int(data_config['classes'])
+    nC = int(data_config['classes'])  # number of classes (80 for COCO)
     if platform == 'darwin':  # MacOS (local)
         test_path = data_config['valid']
     else:  # linux (cloud, i.e. gcp)
@@ -49,9 +51,7 @@ dataloader = load_images_and_labels(test_path, batch_size=opt.batch_size, img_si
 
     print('Compute mAP...')
 
-nC = 80  # number of classes
-correct = 0
-targets = None
+    mAP = 0
     outputs, mAPs, TP, confidence, pred_class, target_class = [], [], [], [], [], []
     AP_accum, AP_accum_count = np.zeros(nC), np.zeros(nC)
     for batch_i, (imgs, targets) in enumerate(dataloader):
@@ -81,7 +81,6 @@ for batch_i, (imgs, targets) in enumerate(dataloader):
 
             # If no annotations add number of detections as incorrect
             if annotations.size(0) == 0:
-            target_cls = []
                 # correct.extend([0 for _ in range(len(detections))])
                 mAPs.append(0)
                 continue
@@ -108,7 +107,8 @@ for batch_i, (imgs, targets) in enumerate(dataloader):
                         correct.append(0)
 
             # Compute Average Precision (AP) per class
-        AP, AP_class = ap_per_class(tp=correct, conf=detections[:, 4], pred_cls=detections[:, 6], target_cls=target_cls)
+            AP, AP_class = ap_per_class(tp=correct, conf=detections[:, 4], pred_cls=detections[:, 6],
+                                        target_cls=target_cls)
 
             # Accumulate AP per class
             AP_accum_count += np.bincount(AP_class, minlength=nC)
@@ -121,7 +121,8 @@ for batch_i, (imgs, targets) in enumerate(dataloader):
             mAPs.append(mAP)
 
             # Print image mAP and running mean mAP
-        print('+ Sample [%d/%d] AP: %.4f (%.4f)' % (len(mAPs), len(dataloader) * opt.batch_size, mAP, np.mean(mAPs)))
+            print(
+                '+ Sample [%d/%d] AP: %.4f (%.4f)' % (len(mAPs), len(dataloader) * opt.batch_size, mAP, np.mean(mAPs)))
 
     # Print mAP per class
     classes = load_classes(opt.class_path)  # Extracts class labels from file
@@ -130,3 +131,8 @@ for i, c in enumerate(classes):
 
     # Print mAP
     print('Mean Average Precision: %.4f' % np.mean(mAPs))
+    return mAP
+
+
+if __name__ == '__main__':
+    mAP = main(opt)

train.py

@@ -1,5 +1,6 @@
 import argparse
 import time
+import test
 
 from models import *
 from utils.datasets import *
@@ -103,10 +104,10 @@ def main(opt):
         # scheduler.step()
 
         # Update scheduler (manual)  at 0, 54, 61 epochs to 1e-3, 1e-4, 1e-5
-        if epoch < 50:
-            lr = 1e-4
-        else:
+        if epoch > 50:
             lr = 1e-5
+        else:
+            lr = 1e-4
         for g in optimizer.param_groups:
             g['lr'] = lr
 
@@ -160,10 +161,6 @@ def main(opt):
             t1 = time.time()
             print(s)
 
-        # Write epoch results
-        with open('results.txt', 'a') as file:
-            file.write(s + '\n')
-
         # Update best loss
         loss_per_target = rloss['loss'] / rloss['nT']
         if loss_per_target < best_loss:
@@ -184,6 +181,14 @@ def main(opt):
         if (epoch > 0) & (epoch % 5 == 0):
             os.system('cp weights/latest.pt weights/backup' + str(epoch) + '.pt')
 
+        # Calculate mAP
+        test.opt.weights_path = 'weights/latest.pt'
+        mAP = test.main(test.opt)
+
+        # Write epoch results
+        with open('results.txt', 'a') as file:
+            file.write(s + '%11.3g' % mAP + '\n')
+
     # Save final model
     dt = time.time() - t0
     print('Finished %g epochs in %.2fs (%.2fs/epoch)' % (epoch, dt, dt / (epoch + 1)))

utils/gcp.sh

@@ -11,7 +11,7 @@ gsutil cp gs://ultralytics/yolov3.pt yolov3/weights
 python3 detect.py
 
 # Test
-python3 test.py -img_size 416 -weights_path weights/latest.pt -conf_thres 0.1
+python3 test.py -img_size 416 -weights_path weights/latest.pt -conf_thres 0.5
 
 # Download and Test
 sudo rm -rf yolov3 && git clone https://github.com/ultralytics/yolov3 && cd yolov3

utils/utils.py

@@ -435,7 +435,7 @@ def plot_results():
     import numpy as np
     import matplotlib.pyplot as plt
     plt.figure(figsize=(16, 8))
-    s = ['X', 'Y', 'Width', 'Height', 'Objectness', 'Classification', 'Total Loss', 'Precision', 'Recall']
+    s = ['X', 'Y', 'Width', 'Height', 'Objectness', 'Classification', 'Total Loss', 'Precision', 'Recall', 'mAP']
     for f in ('results.txt',):
         results = np.loadtxt(f, usecols=[2, 3, 4, 5, 6, 7, 8, 9, 10]).T
         for i in range(9):