'**SUMMARY**
Get the ROI as a list of the top left corner\'s x and y position
and the roi\'s width and height in pixels.
**RETURNS**
A list of the form [x,y,w,h]
**EXAMPLE**
>>> roi = ROI(10,10,100,100,img)
>>> roi.translate(30,30)
>>> print roi.toXYWH()'

def toXYWH(self):

    return [self.xtl, self.ytl, self.w, self.h]
