def cmd_trs_rdn(self):
     self.img = Transform(glb_img).radon()
     return self.canvas_image(self.img)
 def cmd_trs_rscl(self):
     self.img = Transform(glb_img).rescale()
     return self.canvas_image(self.img)
 def cmd_trs_swirl(self):
     self.img = Transform(glb_img).swirl()
     return self.canvas_image(self.img)
 def cmd_trs_rtt(self):
     self.img = Transform(glb_img).rotate()
     return self.canvas_image(self.img)