Worked on card detection

shenzhen_solitaire/cv/card_finder.py

@@ -0,0 +1,22 @@
+from typing import List, Tuple
+import numpy
+from .adjustment import Adjustment, get_square
+from .. import board
+
+
+def _extract_squares(image: numpy.ndarray,
+                     squares: List[Tuple[int,
+                                         int,
+                                         int,
+                                         int]]) -> List[numpy.ndarray]:
+    return [image[square[1]:square[3], square[0]:square[2]].copy()
+            for square in squares]
+
+
+def get_field_squares(image: numpy.ndarray,
+                      adjustment: Adjustment) -> List[numpy.ndarray]:
+    squares = []
+    for ix in range(8):
+        for iy in range(5):
+            squares.append(get_square(adjustment, ix, iy))
+    return _extract_squares(image, squares)