'**SUMMARY**
Returns a nparray with the cropped features as SimpleCV image.
**RETURNS**
A SimpleCV image cropped to each image.
**EXAMPLE**
>>> img = Image("Lenna")
>>> blobs = img.findBlobs(128)
>>> for b in blobs:
>>>   newImg = b.crop()
>>>   newImg.show()
>>>   time.sleep(1)'

def crop(self):

    return np.array([f.crop() for f in self])
