An image processing method includes obtaining raw image data of an object by generating the object by an imager that generates an image of the object with color decomposition, decomposing the raw image data into a plurality of color planes such that each of the color planes comprises pixel information of a color pertinent to the color plane, and compressing data of each color plane. The connecting member is engaged with the sheaths and is loosely received in the guide rails along a lateral direction. This invention provides a protection mechanism of control channels without additional overhead and with higher level of resilience capability to improve shortcomings of the LMP and MPLS based schemes.