Finalized lens work. Started initial unit tests.

examples/callbacks/black_and_white.py

@@ -0,0 +1,9 @@
+from displayarray import display
+import numpy as np
+
+
+def black_and_white(arr):
+    return (np.sum(arr, axis=-1) / 3).astype(np.uint8)
+
+
+display(0, callbacks=black_and_white, blocking=True)

examples/callbacks/psychadelic_effect.py

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+from displayarray import display
+import math as m
+from examples.videos import test_video
+
+
+def forest_color(arr):
+    forest_color.i += 1
+    arr[..., 0] = (m.sin(forest_color.i * (2 * m.pi) * .4 / 360) * 255 + arr[..., 0]) % 255
+    arr[..., 1] = (m.sin((forest_color.i * (2 * m.pi) * .5 + 45) / 360) * 255 + arr[..., 1]) % 255
+    arr[..., 2] = (m.cos(forest_color.i * (2 * m.pi) * .3 / 360) * 255 + arr[..., 2]) % 255
+
+
+forest_color.i = 0
+
+display(test_video, callbacks=forest_color, blocking=True, fps_limit=120)

examples/callbacks/random_display.py

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+from displayarray import display
+import numpy as np
+
+arr = np.random.normal(0.5, 0.1, (500, 500, 3))
+
+
+def fix_arr_cv(arr_in):
+    arr_in[:] += np.random.normal(0.01, 0.005, (500, 500, 3))
+    arr_in %= 1.0
+
+
+display(arr, callbacks=fix_arr_cv, blocking=True)