Initial commit with project files

5_Bildanalyse/ü8/README.md

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+# Übung 8: Vereinigung und Querschnitt
+
+Betrachten Sie die folgenden Binärbilder:
+
+| Objekt 1 | Objekt 2 |
+| -------- | -------- |
+| ![](data/a.png) | ![](data/b.png) |
+
+
+## a) Vereinigung
+
+Zeichnen Sie die Vereinigung der beiden Objekte.
+Die Lösung befindet sich in Datei [l_a.py](l_a.py).

5_Bildanalyse/ü8/l_a.py

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+import numpy as np
+import cv2
+
+obj1 = np.asarray([
+    [0, 0, 0, 0, 0, 0, 0, 0],
+    [0, 1, 1, 1, 1, 1, 0, 0],
+    [0, 1, 1, 0, 1, 1, 0, 0],
+    [0, 1, 1, 1, 1, 1, 0, 0],
+    [0, 0, 1, 1, 1, 0, 0, 0],
+    [0, 0, 0, 0, 0, 0, 0, 0],
+    [0, 0, 0, 0, 0, 0, 0, 0],
+    [0, 0, 0, 0, 0, 0, 0, 0],
+])
+
+obj2 = np.asarray([
+    [0, 0, 0, 0, 0, 0, 0, 0],
+    [0, 0, 0, 0, 0, 0, 0, 0],
+    [0, 0, 0, 0, 1, 0, 0, 0],
+    [0, 0, 0, 1, 1, 0, 0, 0],
+    [0, 0, 0, 1, 1, 0, 0, 0],
+    [0, 0, 0, 1, 1, 1, 0, 0],
+    [0, 0, 0, 0, 1, 1, 0, 0],
+    [0, 0, 0, 0, 0, 0, 0, 0],
+])
+
+# obj1 = np.ones((5, 5))
+# obj2 = np.ones((5, 5))
+
+union = np.maximum(obj1, obj2)
+
+
+# Visualize images
+
+# Resize image
+obj1 = np.repeat(obj1, 50, axis=1)
+obj1 = np.repeat(obj1, 50, axis=0)
+obj2 = np.repeat(obj2, 50, axis=1)
+obj2 = np.repeat(obj2, 50, axis=0)
+union = np.repeat(union, 50, axis=1)
+union = np.repeat(union, 50, axis=0)
+
+# Add seperators
+obj1[0::2, ::50] = 1
+obj1[1::2, ::50] = 0
+obj1[::50, 0::2] = 1
+obj1[::50, 1::2] = 0
+obj2[0::2, ::50] = 1
+obj2[1::2, ::50] = 0
+obj2[::50, 0::2] = 1
+obj2[::50, 1::2] = 0
+union[0::2, ::50] = 1
+union[1::2, ::50] = 0
+union[::50, 0::2] = 1
+union[::50, 1::2] = 0
+
+# Show image
+obj1 = obj1.astype(np.float64)
+obj2 = obj2.astype(np.float64)
+union = union.astype(np.float64)
+
+cv2.imshow("obj1", obj1)
+cv2.imshow("obj2", obj2)
+cv2.imshow("union", union)
+cv2.imwrite("data/white.png", obj1 * 255)
+
+cv2.waitKey(0)

5_Bildanalyse/ü8/l_b.py

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+import numpy as np
+import cv2
+
+obj1 = np.asarray([
+    [0, 0, 0, 0, 0, 0, 0, 0],
+    [0, 1, 1, 1, 1, 1, 0, 0],
+    [0, 1, 1, 0, 1, 1, 0, 0],
+    [0, 1, 1, 1, 1, 1, 0, 0],
+    [0, 0, 1, 1, 1, 0, 0, 0],
+    [0, 0, 0, 0, 0, 0, 0, 0],
+    [0, 0, 0, 0, 0, 0, 0, 0],
+    [0, 0, 0, 0, 0, 0, 0, 0],
+])
+
+obj2 = np.asarray([
+    [0, 0, 0, 0, 0, 0, 0, 0],
+    [0, 0, 0, 0, 0, 0, 0, 0],
+    [0, 0, 0, 0, 1, 0, 0, 0],
+    [0, 0, 0, 1, 1, 0, 0, 0],
+    [0, 0, 0, 1, 1, 0, 0, 0],
+    [0, 0, 0, 1, 1, 1, 0, 0],
+    [0, 0, 0, 0, 1, 1, 0, 0],
+    [0, 0, 0, 0, 0, 0, 0, 0],
+])
+
+
+intersection = obj1 * obj2
+
+
+# Visualize images
+
+# Resize image
+obj1 = np.repeat(obj1, 50, axis=1)
+obj1 = np.repeat(obj1, 50, axis=0)
+obj2 = np.repeat(obj2, 50, axis=1)
+obj2 = np.repeat(obj2, 50, axis=0)
+intersection = np.repeat(intersection, 50, axis=1)
+intersection = np.repeat(intersection, 50, axis=0)
+
+# Add seperators
+obj1[0::2, ::50] = 1
+obj1[1::2, ::50] = 0
+obj1[::50, 0::2] = 1
+obj1[::50, 1::2] = 0
+obj2[0::2, ::50] = 1
+obj2[1::2, ::50] = 0
+obj2[::50, 0::2] = 1
+obj2[::50, 1::2] = 0
+intersection[0::2, ::50] = 1
+intersection[1::2, ::50] = 0
+intersection[::50, 0::2] = 1
+intersection[::50, 1::2] = 0
+
+# Show image
+obj1 = obj1.astype(np.float64)
+obj2 = obj2.astype(np.float64)
+intersection = intersection.astype(np.float64)
+
+cv2.imshow("obj1", obj1)
+cv2.imshow("obj2", obj2)
+cv2.imshow("intersection", intersection)
+
+cv2.waitKey(0)