Some problems while using open3d with depth pro

[GLY-123]

When I use depth map that genreate from Depth Pro compareing with that from Kinect Dk,there are some point behind the suface .I think it should be like the Figure 1.I want to know what is the reason,and is it normal.there is the code.thank you Thanks♪(･ω･)ﾉ

`import open3d as o3d
import numpy as np
import cv2

color_image=o3d.io.read_image(r"E:\NJAU\code\function\My_open3d\test_plant\00000.jpg")
depth_image=o3d.io.read_image(r"E:\NJAU\code\function\My_open3d\test_plant\00000_pro.png")
print(f"dept_image,min:{np.min(depth_image)},max:{np.max(depth_image)}")

rgbd_image=o3d.geometry.RGBDImage.create_from_color_and_depth(color_image,depth_image)
print(rgbd_image)

matrix = np.array([[605.0721435546875, 0.0,644.199462890625],
[0.0, 604.8974609375, 364.885986328125],
[0.0, 0.0, 1.0]], dtype=np.float64)
pcd=o3d.geometry.PointCloud.create_from_rgbd_image(
rgbd_image,
o3d.camera.PinholeCameraIntrinsic(height=720,width=1280,
intrinsic_matrix=matrix)
)
pcd.transform([[1,0,0,0],[0,-1,0,0],[0,0,-1,0],[0,0,0,1]])
o3d.visualization.draw_geometries([pcd])
`
Figure 1 is Using depth map from Kinect DK

Figure 1
Figure 2 is using depth map from Depth Pro

Figure 2