Add files.

tagger/dbimutils.py

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+# DanBooru IMage Utility functions
+
+import cv2
+import numpy as np
+from PIL import Image
+
+
+def smart_imread(img, flag=cv2.IMREAD_UNCHANGED):
+    if img.endswith(".gif"):
+        img = Image.open(img)
+        img = img.convert("RGB")
+        img = cv2.cvtColor(np.array(img), cv2.COLOR_RGB2BGR)
+    else:
+        img = cv2.imread(img, flag)
+    return img
+
+
+def smart_24bit(img):
+    if img.dtype is np.dtype(np.uint16):
+        img = (img / 257).astype(np.uint8)
+
+    if len(img.shape) == 2:
+        img = cv2.cvtColor(img, cv2.COLOR_GRAY2BGR)
+    elif img.shape[2] == 4:
+        trans_mask = img[:, :, 3] == 0
+        img[trans_mask] = [255, 255, 255, 255]
+        img = cv2.cvtColor(img, cv2.COLOR_BGRA2BGR)
+    return img
+
+
+def make_square(img, target_size):
+    old_size = img.shape[:2]
+    desired_size = max(old_size)
+    desired_size = max(desired_size, target_size)
+
+    delta_w = desired_size - old_size[1]
+    delta_h = desired_size - old_size[0]
+    top, bottom = delta_h // 2, delta_h - (delta_h // 2)
+    left, right = delta_w // 2, delta_w - (delta_w // 2)
+
+    color = [255, 255, 255]
+    new_im = cv2.copyMakeBorder(
+        img, top, bottom, left, right, cv2.BORDER_CONSTANT, value=color
+    )
+    return new_im
+
+
+def smart_resize(img, size):
+    # Assumes the image has already gone through make_square
+    if img.shape[0] > size:
+        img = cv2.resize(img, (size, size), interpolation=cv2.INTER_AREA)
+    elif img.shape[0] < size:
+        img = cv2.resize(img, (size, size), interpolation=cv2.INTER_CUBIC)
+    return img