--- a
+++ b/CaraNet/utils/format_conversion.py
@@ -0,0 +1,40 @@
+import os
+import shutil
+from libtiff import TIFF    # pip install libtiff
+from scipy import misc
+import random
+
+
+def tif2png(_src_path, _dst_path):
+    """
+    Usage:
+        formatting `tif/tiff` files to `jpg/png` files
+    :param _src_path:
+    :param _dst_path:
+    :return:
+    """
+    tif = TIFF.open(_src_path, mode='r')
+    image = tif.read_image()
+    misc.imsave(_dst_path, image)
+
+
+def data_split(src_list):
+    """
+    Usage:
+        randomly spliting dataset
+    :param src_list:
+    :return:
+    """
+    counter_list = random.sample(range(0, len(src_list)), 550)
+
+    return counter_list
+
+
+if __name__ == '__main__':
+    src_dir = '../Dataset/train_dataset/CVC-EndoSceneStill/CVC-612/test_split/masks_tif'
+    dst_dir = '../Dataset/train_dataset/CVC-EndoSceneStill/CVC-612/test_split/masks'
+
+    os.makedirs(dst_dir, exist_ok=True)
+    for img_name in os.listdir(src_dir):
+        tif2png(os.path.join(src_dir, img_name),
+                os.path.join(dst_dir, img_name.replace('.tif', '.png')))