Method for separating passenger target image and background by auxiliary regular veins

The invention relates to a method for separating a targeted image from a background image of a passenger by using auxiliary regular textures. The method comprises the following steps of receiving a newly-acquired digital image; following the image pre-processing if the image is detected to be successfully received; carrying out the image border detection if the image is detected to be successfully processed; following the linear detection if the image border detection is detected to be successful; locating a covered linear section if the linear detection of the image is detected to be successful; capturing a human image area if the location is detected to be successful; and outputting the human image area if the capturing is detected to be successful. Compared with the prior art, the method of the invention can better solve the problem of the separation of the targeted image from the background image of a human body under the circumstances of an extremely complex external working environment as well as comple