A side mirror cover comprises a mirror plate covering member and a side mirror lamp. 65, and a high performance spintronics devices using the same. The device further includes a top diode material and an active diode region between the top and bottom diode materials. A binarization process is performed on the median-filtered two-dimension code picture, and a binary image is obtained, such that a two-dimension code in the two-dimension code picture may be effectively identified by utilizing the binary image, and accuracy for identifying the two-dimension code may also be improved. A camera unit is installed at the other side of the top plate.