Update orbbec(uvc) tutorial

samples/python/tutorial_code/videoio/videocapture_obsensor.py

@@ -0,0 +1,38 @@
+#!/usr/bin/env python
+
+import numpy as np
+import sys
+import cv2 as cv
+
+
+def main():
+    # Open Orbbec depth sensor
+    orbbec_cap = cv.VideoCapture(0, cv.CAP_OBSENSOR)
+    if orbbec_cap.isOpened() == False:
+        sys.exit("Fail to open camera.")
+
+    while True:
+        # Grab data from the camera
+        if orbbec_cap.grab():
+            # RGB data
+            ret_bgr, bgr_image = orbbec_cap.retrieve(None, cv.CAP_OBSENSOR_BGR_IMAGE)
+            if ret_bgr:
+                cv.imshow("BGR", bgr_image)
+
+            # depth data
+            ret_depth, depth_map = orbbec_cap.retrieve(None, cv.CAP_OBSENSOR_DEPTH_MAP)
+            if ret_depth:
+                color_depth_map = cv.normalize(depth_map, None, 0, 255, cv.NORM_MINMAX, cv.CV_8UC1)
+                color_depth_map = cv.applyColorMap(color_depth_map, cv.COLORMAP_JET)
+                cv.imshow("DEPTH", color_depth_map)
+        else:
+            print("Fail to grab data from the camera.")
+
+        if cv.pollKey() >= 0:
+            break
+
+    orbbec_cap.release()
+
+
+if __name__ == '__main__':
+    main()