modified: README.md

a.py

@@ -0,0 +1,3 @@
+
+
+print "czesc"

matrix.py

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+
+
+def reduce(matIn, n_size):
+    nx, ny = n_size
+    sx = len(matIn)
+    sy = len(matIn[0])
+
+    if sx < nx or sy < ny:
+        raise Exception("New size should be smaller then origin")
+
+    nxs = sx / nx
+    nys = sy / nx
+
+    mat = [[0. for i in range(nx)] for j in range(ny)]
+
+    for i in range(nx):
+        for j in range(ny):
+            x = int(i*nxs)
+            y = int(j*nys)
+            ids = 1
+            s = matIn[x][y]
+            for xi in range(-1, 2, 2):
+                for yj in range(-1, 2, 2):
+                    ii = x+xi
+                    jj = y + yj
+                    if 0 <= ii < sx and 0 <= jj < sy:
+                        s += matIn[x+xi][y+yj]
+                        ids += 1
+
+            mat[i][j] = s/ids
+
+    return mat
+
+
+# m = [[float(i*j) for i in range(5)] for j in range(5)]
+#
+# print np.array(m)
+#
+# print np.array(reduce(m, (3, 3)))

solution.py

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+import matplotlib.pyplot as plt
+import matplotlib.image as mpimg
+import matplotlib.colors as colors
+import numpy as np
+
+import matrix
+
+out = "output.txt"
+infile ='input.png'
+
+img = mpimg.imread(infile)
+
+nsize = 20
+
+nonreduced = np.copy(img)
+
+R = matrix.reduce( img[:, :, 0], (nsize, nsize))
+G = matrix.reduce( img[:, :, 1], (nsize, nsize))
+B = matrix.reduce( img[:, :, 2], (nsize, nsize))
+
+# old fashion
+# img = np.array( [ [ [R[i][j], G[i][j], B[i][j]] for j in range(nsize)] for i in range(nsize)] )
+# or
+img = np.zeros((nsize, nsize, 3))
+img[:, :, 0] = R
+img[:, :, 1] = G
+img[:, :, 2] = B
+
+
+hsvimg = colors.rgb_to_hsv(img)
+hsvimg[:, :, 1] = 0
+
+cliped = np.copy(hsvimg)
+
+# old fashion
+# dark = np.array( [ [ [False] for j in range(nsize) ] for i in range(nsize)] )
+# light = np.array( [ [ [False] for j in range(nsize) ] for i in range(nsize)] )
+# or
+dark = np.zeros((nsize, nsize), dtype=bool)
+light = np.copy(dark)
+
+for i in range(nsize):
+    for j in range(nsize):
+        if hsvimg[i, j, 2] < 0.3:
+            cliped[i, j, 2] = 0
+            dark[i, j] = True
+        elif hsvimg[i, j][2] < 0.6:
+            cliped[i, j][2] = .3
+            light[i, j] = True
+        else:
+            cliped[i, j, 2] = 1
+
+
+with open(out, 'w') as f:
+    for d, l in zip(dark, light):
+        line = np.array(["  "]*nsize)
+        line[d] = "||"
+        line[l] = "- "
+        f.write("".join(line))
+        f.write("\n")