'Return the color tuple from x,y
**SUMMARY**
Return a numpy array of the average color of the area covered by each Feature.
**RETURNS**
Returns an array of RGB triplets the correspond to the mean color of the feature.
**EXAMPLE**
>>> img = Image("lenna")
>>> kp = img.findKeypoints()
>>> c = kp.meanColor()'

def meanColor(self):

    x = int((self.x - (self.window / 2)))
    y = int((self.y - (self.window / 2)))
    return self.image.crop(x, y, int(self.window), int(self.window)).meanColor()
