kleuren plaatjes worden omgezet naar grijswaarden, zwart wit plaatjes

niet

src/GrayscaleImage.py

 from pylab import imshow, imread, show
-from scipy.misc import imresize
+from scipy.misc import imresize, imsave
 
 class GrayscaleImage:
 
     def __init__(self, image_path = None, data = None):
-        if image_path != None:
+        if image_path:
             self.data = imread(image_path)
             self.convert_to_grayscale()
-        elif data != None:
+        elif data:
             self.data = data
     
     def __iter__(self):
@@ -29,7 +29,8 @@ class GrayscaleImage:
         return self.data[position]
         
     def convert_to_grayscale(self):
-        self.data = self.data.sum(axis=2) / 3
+        if len(self.data.shape) > 2:
+          self.data = self.data[:,:,:3].sum(axis=2) / 3
         
     def crop(self, rectangle):
         self.data = self.data[rectangle.y : rectangle.y + rectangle.height, 
@@ -39,21 +40,26 @@ class GrayscaleImage:
         imshow(self.data, cmap="gray")
         show()
     
-    # size is of type float
-    def resize(self, size):
+    def resize(self, size): # size is of type float
         self.data = imresize(self.data, size)
         
     def get_shape(self):
         return self.data.shape
+        
     shape = property(get_shape)
     
     def get_width(self):
         return self.get_shape()[1]
+        
     width = property(get_width)
         
     def get_height(self):
         return self.get_shape()[0]
+        
     height = property(get_height)
         
     def in_bounds(self, y, x):
         return x >= 0 and x < self.width and y >= 0 and y < self.height
+        
+    def save(self, path):
+        imsave(path, self.data)
\ No newline at end of file

src/LBP.py

-#!/usr/bin/python
-import Image
-from numpy import array, zeros, byte
-from matplotlib.pyplot import imshow, subplot, show, axis
-
-# Divide the examined window to cells (e.g. 16x16 pixels for each cell).
-
-# For each pixel in a cell, compare the pixel to each of its 8 neighbors
-# (on its left-top, left-middle, left-bottom, right-top, etc.). Follow the
-# pixels along a circle, i.e. clockwise or counter-clockwise.
-
-# Where the center pixel's value is greater than the neighbor, write "1".
-# Otherwise, write "0". This gives an 8-digit binary number (which is usually
-# converted to decimal for convenience).
-
-# Compute the histogram, over the cell, of the frequency of each "number"
-# occurring (i.e., each combination of which pixels are smaller and which are
-# greater than the center).
-
-# Optionally normalize the histogram. Concatenate normalized histograms of all
-# cells. This gives the feature vector for the window.
-
-CELL_SIZE = 16
-
-def domain_iterator(shape):
-    """Iterate over the pixels of an image."""
-    for y in xrange(shape[0]):
-        for x in xrange(shape[1]):
-            yield y, x
-
-image = array(Image.open('../images/test.png').convert('L'))
-
-def in_image(y, x, F):
-    """Check if given pixel coordinates are within the bounds of image F."""
-    return 0 <= y < F.shape[0] and 0 <= x < F.shape[1]
-
-def features(image):
-    """Compare each pixel to each of its eight neigheach pixel to each of its
-    eight neighbours."""
-    features = zeros(image.shape, dtype=byte)
-
-    def cmp_pixels(y, x, p):
-        """Check if two pixels (y, x) and p are in the image, and if the value
-        at (y, x) is larger than the value at p."""
-        return in_image(y, x, image) and image[y, x] > p
-
-    for y, x in domain_iterator(features.shape):
-        p = image[y, x]
-
-        # Walk around the pixel in counter-clokwise order, shifting 1 bit less
-        # at each neighbour starting at 7 in the top-left corner. This gives a
-        # 8-bit feature number of a pixel
-        features[y, x] = byte(cmp_pixels(y - 1, x - 1, p)) << 7 \
-                         | byte(cmp_pixels(y - 1, x, p)) << 6 \
-                         | byte(cmp_pixels(y - 1, x + 1, p)) << 5 \
-                         | byte(cmp_pixels(y, x + 1, p)) << 4 \
-                         | byte(cmp_pixels(y + 1, x + 1, p)) << 3 \
-                         | byte(cmp_pixels(y + 1, x, p)) << 2 \
-                         | byte(cmp_pixels(y + 1, x - 1, p)) << 1 \
-                         | byte(cmp_pixels(y, x - 1, p))
-
-    return features
-
-def feature_vectors(image):
-    """Create cell histograms of an image"""
-    F = features(image)
-
-V = feature_vectors(image)
-subplot(121)
-imshow(image, cmap='gray')
-subplot(122)
-imshow(V, cmap='gray')
-axis('off')
-show()

src/LocalBinaryPatternizer.py

@@ -9,7 +9,6 @@ class LocalBinaryPatternizer:
         self.image = image
         self.setup_histograms()
 
-        
     def setup_histograms(self):
         cells_in_width = int(ceil(self.image.width / float(self.cell_size)))
         cells_in_height = int(ceil(self.image.height / float(self.cell_size)))
@@ -19,7 +18,6 @@ class LocalBinaryPatternizer:
             for j in xrange(cells_in_width):
                 self.features[i].append(Histogram(256,0,256))
 
-                
     def create_features_vector(self):
         ''' Walk around the pixels in clokwise order, shifting 1 bit less
             at each neighbour starting at 7 in the top-left corner. This gives a
@@ -40,14 +38,11 @@ class LocalBinaryPatternizer:
 
         return self.get_features_as_array()
     
-    
     def is_pixel_darker(self, y, x, value):
         return self.image.in_bounds(y, x) and self.image[y, x] > value
         
-        
     def get_cell_index(self, y, x):
         return (y / self.cell_size, x / self.cell_size)
         
-        
     def get_features_as_array(self):
-        return [item for sublist in self.features for item in sublist]
+        return [item for sublist in self.features for item in sublist]
\ No newline at end of file