publish backlog of things

art2.py

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+from PIL import Image
+import numpy.fft as fft
+import numpy as np
+import random
+import math
+
+w, h = 512, 512
+out = np.zeros((w, h, 3))
+
+random.seed(4)
+
+def operate_on_channel(n):
+    mask = np.full((w, h), 1)
+    midx, midy = w // 2, h // 2
+    
+    J = 1
+    for x in range(midx - J, midx + J + 1):
+        for y in range(midy - J, midy + J + 1):
+            mask[x, y] = 0.5
+    """
+    for x in range(w):
+        for y in range(h):
+            dist = (x - midx) ** 2 + abs(y - midy) ** 2
+            #if 1024 > dist > 4:
+    #                mask[x, y] = 1
+            #mask[x, y] = math.sqrt(dist) / 500
+            if dist < 256: mask[x, y] = 1
+    """
+    """
+    for x in range(w):
+        for y in range(h):
+            mask[x, y] = random.uniform(0.7, 1)
+    """
+    channel = fft.ifftshift(mask)
+    rfft = fft.ifft2(channel)
+    channel = np.abs(np.real(rfft))
+    #red2 = np.abs(np.imag(rfft))
+    #red = np.log(np.abs(np.real(red)))
+    #red = np.abs(mask)
+
+    channel = channel * (255 / np.max(channel))
+    #red2 = red2 * (255 / np.max(red2))
+
+    out[..., n] = channel
+
+for i in range(3):
+    operate_on_channel(i)
+
+out = Image.fromarray(out, "RGB")
+out.save("/tmp/out.png")