1. A method for processing a depth image, the method comprising: obtaining the depth image and a captured image corresponding to the depth image; segmenting the depth image to obtain a plurality of segmentation units; calculating, for each segmentation unit, a corresponding reference value for a depth of said segmentation unit; determining a standard range of depth value for each segmentation unit based on the corresponding reference value; and adjusting a depth value of each pixel of the depth image according to the standard range of depth value corresponding to the segmentation unit in which the pixel is located.