A method and an apparatus for detecting straight line information by Hough transform are provided, in which voting computation according to Hough transform is performed only with respect to certain pixels, while the votes of the rest pixels are calculated using the votes of the neighborhood pixels, thereby reducing overhead of voting computation and also increasing hourly throughput. The functionalized copolymer in the form of a block andor graft copolymer includes hard segments and soft segments, where the soft segments are covalently bonded with a coupling agent either before or after copolymerization with the hard segments. This PEG-conjugated EPO addresses such a need and provides more sustained efficacy. The reflective strips attach to the structured optical film by a first discontinuous adhesive layer, having first adhesive areas.