'**SUMMARY**
Given a point (default to center of the image), return the euclidean distance of x,y from this point.
**PARAMETERS**
* *point* - The point, as an (x,y) tuple on the image to measure distance from.
**RETURNS**
The distance as a floating point value in pixels.
**EXAMPLE**
>>> img = Image("OWS.jpg")
>>> blobs = img.findBlobs(128)
>>> blobs[-1].distanceFrom(blobs[-2].coordinates())'

def distanceFrom(self, point=((-1), (-1))):

    if ((point[0] == (-1)) or (point[1] == (-1))):
        point = (np.array(self.image.size()) / 2)
    return spsd.euclidean(point, [self.x, self.y])
