Add refactor of iam lines

1 files changed, 49 insertions, 0 deletions

diff --git a/text_recognizer/data/image_utils.py b/text_recognizer/data/image_utils.py
new file mode 100644
index 0000000..c2b8915
--- /dev/null
+++ b/text_recognizer/data/image_utils.py
@@ -0,0 +1,49 @@
+"""Image util functions for loading and saving images."""
+from pathlib import Path
+from typing import Union
+from urllib.request import urlopen
+
+import cv2
+import numpy as np
+from PIL import Image
+
+
+def read_image_pil(image_uri: Union[Path, str], grayscale: bool = False) -> Image:
+    """Return PIL image."""
+    image = Image.open(image_uri)
+    if grayscale:
+        image = image.convert("L")
+    return image
+
+
+def read_image(image_uri: Union[Path, str], grayscale: bool = False) -> np.array:
+    """Read image_uri."""
+
+    if isinstance(image_uri, str):
+        image_uri = Path(image_uri)
+
+    def read_image_from_filename(image_filename: Path, imread_flag: int) -> np.array:
+        return cv2.imread(str(image_filename), imread_flag)
+
+    def read_image_from_url(image_url: Path, imread_flag: int) -> np.array:
+        url_response = urlopen(str(image_url))  # nosec
+        image_array = np.array(bytearray(url_response.read()), dtype=np.uint8)
+        return cv2.imdecode(image_array, imread_flag)
+
+    imread_flag = cv2.IMREAD_GRAYSCALE if grayscale else cv2.IMREAD_COLOR
+    image = None
+
+    if image_uri.exists():
+        image = read_image_from_filename(image_uri, imread_flag)
+    else:
+        image = read_image_from_url(image_uri, imread_flag)
+
+    if image is None:
+        raise ValueError(f"Could not load image at {image_uri}")
+
+    return image
+
+
+def write_image(image: np.ndarray, filename: Union[Path, str]) -> None:
+    """Write image to file."""
+    cv2.imwrite(str(filename), image)