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Does opencv_dnn use gpu?

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I tried to run the code in Jetson GPU but I can't? I just obtained 5 fps, this means that use CPU not GPU this is my full code from imutils.video import VideoStream from imutils.video import FPS import numpy as np import argparse import imutils import time import cv2 CLASSES = ["background", "aeroplane", "bicycle", "bird", "boat", "bottle", "bus", "car", "cat", "chair", "cow", "diningtable", "dog", "horse", "motorbike", "person", "pottedplant", "sheep", "sofa", "train", "tvmonitor"] COLORS = np.random.uniform(0, 255, size=(len(CLASSES), 3)) print("[INFO] loading model...") net = cv2.dnn.readNetFromCaffe('prototxt.txt', 'caffemodel') # deep neural network ( dnn ) print("[INFO] starting video stream...") vs = cv2.VideoCapture(0) vs.release() vs = cv2.VideoCapture(0) time.sleep(2.0) fps = FPS().start() while True: ret, frame = vs.read() # add ret, frame = imutils.resize(frame, width=400) (h, w) = frame.shape[:2] blob = cv2.dnn.blobFromImage(cv2.resize(frame, (300, 300)), 0.007843, (300, 300), 127.5) net.setInput(blob) detections = net.forward() big_area = 0 big_center = 320 detected = 0 # loop over the detections for i in np.arange(0, detections.shape[2]): confidence = detections[0, 0, i, 2] object_type = int(detections[0, 0, i, 1]) if object_type == 15 and confidence > 0.2: # it was if confidence > args["confidence"]: box = detections[0, 0, i, 3:7] * np.array([w, h, w, h]) (startX, startY, endX, endY) = box.astype("int") label = "{}: {:.2f}%".format('person', confidence * 100) cv2.rectangle(frame, (startX, startY), (endX, endY), [0, 0, 255], 2) y = startY - 15 if startY - 15 > 15 else startY + 15 cv2.putText(frame, label, (startX, y), cv2.FONT_HERSHEY_SIMPLEX, 0.5, [0, 0, 255], 2) rect_area = (endX - startX) * (endY - startY) detected = 1 if rect_area > big_area: # big_area and big_center are used so that the TurtleBot always tracks the closest person big_area = rect_area cv2.imshow("Frame", frame) key = cv2.waitKey(1) & 0xFF if key == ord("q"): break fps.update() # stop the timer and display FPS information fps.stop() vs.release() cv2.destroyAllWindows() any ideas or suggestions? thank you in advance

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