Patent ID: 9030468
Filing Date: 2015-05-12
Classification: G06T

Abstract:
1. A depth map generation method for producing a depth map belonging to an image signal, executed by an image processing device, wherein the image signal comprises a plurality of image regions, and each image region in the depth map is designated a depth value, comprising: (A) receiving an image region distribution map comprising a plurality of image regions and a region of interest distribution map comprising a region of interest; (B) executing an aspect ratio testing process and a region of interest overlapping ratio calculation process on each image region; and (C) designating a depth value to each image region to produce the depth map according to a result of the aspect testing process and a result of the region of interest overlapping ratio calculation process; wherein, the image region has a plurality of image pixels, the aspect ratio testing process is used to calculate an aspect ratio value of the image region, and when the aspect ratio value of one of the image region is lower than the aspect ratio threshold value, the depth value designated to the image region and the depth value of another image region perpendicular and neighboring to the image region are identical; the region of interest overlapping ratio calculation process is used to calculate an overlapping ratio between the image region and the region of interest, and the image regions that are neighboring each other and of which each having an overlapping ratio higher than the overlapping ratio threshold value are all designated an identical depth value; wherein, the depth map generation method further comprising a step (D), which produces an adjusted depth map according to a depth map and a depth map based on an earlier time point, comprising: (D1) receiving the depth map and the depth map based on an earlier time point; (D2) comparing the depth value of the texture color feature region designated in the depth map and the depth value of the texture color feature region designated in the depth map based on an earlier time point; and (D3) individually designating an adjusted depth value to the texture color feature region according to the result from comparison, so as to produce the adjusted depth map; wherein the depth map based on an earlier time point works according to a depth map operation formula based on an earlier time point, and from the depth map the result is calculated: wherein, the depth map operation formula based on an earlier time point is: where DVT(x, y, t) is the location of the texture color feature region in the depth map in the two-dimensional image signal. DVT(x′, y′, t−1) is the location of the texture color feature region in a depth map based on an earlier time point, FW_MV