complete funktions for imgutils

imgutils.py

@@ -35,7 +35,13 @@ def image2pixels(image):
             A List containing all ``(R, G, B)``-values of the ``image`` together
             with the coordinates ``(X, Y)`` of the respective pixel.
     """
-    pass # TODO
+    # TODO
+    m, n, k = np.shape(image)
+    result = []
+    for i in range(m):
+        for j in range(n):
+            result.append((image[i][j][0], image[i][j][1], image[i][j][2], j, i))
+    return result
 
 
 def pixels2image(pixels):
@@ -54,7 +60,19 @@ def pixels2image(pixels):
             A NumPy-Array of type ``uint8`` and shape (M, N, 3) representing
             the image given by ``pixels``.
     """
-    pass # TODO
+    # TODO
+    m, n = (0, 0)
+    for t in pixels:
+        if m < t[4]:
+            m = t[4]
+        if n < t[3]:
+            n = t[3]
+    image = np.zeros((m+1, n+1, 3))
+    for t in pixels:
+        image[t[4]][t[3]][0] = t[0]
+        image[t[4]][t[3]][1] = t[1]
+        image[t[4]][t[3]][2] = t[2]
+    return image
 
 
 def bounding_box(pixels):
@@ -71,7 +89,30 @@ def bounding_box(pixels):
             A tuple containing the respective minimum and maximum values of
             each color in the image represented by ``pixels``.
     """
-    pass # TODO
+    # TODO
+    Rmin = pixels[0][0]
+    Rmax = pixels[0][0]
+    Gmin = pixels[0][1]
+    Gmax = pixels[0][1]
+    Bmin = pixels[0][2]
+    Bmax = pixels[0][2]
+
+    for p in pixels:
+        if Rmin > p[0]:
+            Rmin = p[0]
+        if Rmax < p[0]:
+            Rmax = p[0]
+        if Gmin > p[1]:
+            Gmin = p[1]
+        if Gmax < p[1]:
+            Gmax = p[1]
+        if Bmin > p[2]:
+            Bmin = p[2]
+        if Bmax < p[2]:
+            Bmax = p[2]
+    
+    return ((Rmin, Rmax), (Gmin, Gmax), (Bmin, Bmax))
+
 
 
 def color_average(pixels):
@@ -87,7 +128,19 @@ def color_average(pixels):
             A tuple containing the average value of red, green, and blue
             color values in the image represented by ``pixels``.
     """
-    pass # TODO
+    # TODO
+
+    Ravg, Gavg, Bavg = (0, 0, 0)
+    for p in pixels:
+        Ravg += p[0]
+        Gavg += p[1]
+        Bavg += p[2]
+    listLen = len(pixels)
+    Ravg /=  listLen
+    Gavg /=  listLen
+    Bavg /=  listLen
+    return (np.uint8(round(Ravg, 0)), np.uint8(round(Gavg, 0)), np.uint8(round(Bavg, 0)))
+
 
 
 def main():