--- a
+++ b/tools/convert_datasets/voc_aug.py
@@ -0,0 +1,92 @@
+# Copyright (c) OpenMMLab. All rights reserved.
+import argparse
+import os.path as osp
+from functools import partial
+
+import mmcv
+import numpy as np
+from PIL import Image
+from scipy.io import loadmat
+
+AUG_LEN = 10582
+
+
+def convert_mat(mat_file, in_dir, out_dir):
+    data = loadmat(osp.join(in_dir, mat_file))
+    mask = data['GTcls'][0]['Segmentation'][0].astype(np.uint8)
+    seg_filename = osp.join(out_dir, mat_file.replace('.mat', '.png'))
+    Image.fromarray(mask).save(seg_filename, 'PNG')
+
+
+def generate_aug_list(merged_list, excluded_list):
+    return list(set(merged_list) - set(excluded_list))
+
+
+def parse_args():
+    parser = argparse.ArgumentParser(
+        description='Convert PASCAL VOC annotations to mmsegmentation format')
+    parser.add_argument('devkit_path', help='pascal voc devkit path')
+    parser.add_argument('aug_path', help='pascal voc aug path')
+    parser.add_argument('-o', '--out_dir', help='output path')
+    parser.add_argument(
+        '--nproc', default=1, type=int, help='number of process')
+    args = parser.parse_args()
+    return args
+
+
+def main():
+    args = parse_args()
+    devkit_path = args.devkit_path
+    aug_path = args.aug_path
+    nproc = args.nproc
+    if args.out_dir is None:
+        out_dir = osp.join(devkit_path, 'VOC2012', 'SegmentationClassAug')
+    else:
+        out_dir = args.out_dir
+    mmcv.mkdir_or_exist(out_dir)
+    in_dir = osp.join(aug_path, 'dataset', 'cls')
+
+    mmcv.track_parallel_progress(
+        partial(convert_mat, in_dir=in_dir, out_dir=out_dir),
+        list(mmcv.scandir(in_dir, suffix='.mat')),
+        nproc=nproc)
+
+    full_aug_list = []
+    with open(osp.join(aug_path, 'dataset', 'train.txt')) as f:
+        full_aug_list += [line.strip() for line in f]
+    with open(osp.join(aug_path, 'dataset', 'val.txt')) as f:
+        full_aug_list += [line.strip() for line in f]
+
+    with open(
+            osp.join(devkit_path, 'VOC2012/ImageSets/Segmentation',
+                     'train.txt')) as f:
+        ori_train_list = [line.strip() for line in f]
+    with open(
+            osp.join(devkit_path, 'VOC2012/ImageSets/Segmentation',
+                     'val.txt')) as f:
+        val_list = [line.strip() for line in f]
+
+    aug_train_list = generate_aug_list(ori_train_list + full_aug_list,
+                                       val_list)
+    assert len(aug_train_list) == AUG_LEN, 'len(aug_train_list) != {}'.format(
+        AUG_LEN)
+
+    with open(
+            osp.join(devkit_path, 'VOC2012/ImageSets/Segmentation',
+                     'trainaug.txt'), 'w') as f:
+        f.writelines(line + '\n' for line in aug_train_list)
+
+    aug_list = generate_aug_list(full_aug_list, ori_train_list + val_list)
+    assert len(aug_list) == AUG_LEN - len(
+        ori_train_list), 'len(aug_list) != {}'.format(AUG_LEN -
+                                                      len(ori_train_list))
+    with open(
+            osp.join(devkit_path, 'VOC2012/ImageSets/Segmentation', 'aug.txt'),
+            'w') as f:
+        f.writelines(line + '\n' for line in aug_list)
+
+    print('Done!')
+
+
+if __name__ == '__main__':
+    main()