5. The method according to claim 1 , wherein the analyzing an annotation of the original element according to the view coordinates, and determining a plane annotation region that satisfies a preset display condition and corresponds to the annotation as an annotation display region for the annotation comprise: generating the plane annotation region corresponding to the annotation of the original element; and judging whether the plane annotation region satisfies the preset display condition, and if so, determining the plane annotation region is the annotation display region, otherwise, determining the plane annotation region is not the annotation display region.
6. The method according to claim 5 , wherein after the determining a plane annotation region that satisfies a preset display condition as an annotation display region, the method further comprises: assigning, according to the avoidance type, 1 to the bit for identifying the avoidance type in each of respective pixel values of pixels in the view window that correspond to the annotation display region.