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March 8, 2020 20:42
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DjiTelloCameraStreamFaceDetection.py
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# Bruno Capuano | |
# detect faces using haar cascades from https://github.com/opencv/opencv/tree/master/data/haarcascades | |
# enable drone video camera | |
# display video camera using OpenCV | |
# display FPS | |
# detect faces | |
import cv2 | |
import socket | |
import time | |
import threading | |
def receiveData(): | |
global response | |
while True: | |
try: | |
response, _ = clientSocket.recvfrom(1024) | |
except: | |
break | |
def readStates(): | |
global battery | |
while True: | |
try: | |
response_state, _ = stateSocket.recvfrom(256) | |
if response_state != 'ok': | |
response_state = response_state.decode('ASCII') | |
list = response_state.replace(';', ':').split(':') | |
battery = int(list[21]) | |
except: | |
break | |
def sendCommand(command): | |
global response | |
timestamp = int(time.time() * 1000) | |
clientSocket.sendto(command.encode('utf-8'), address) | |
while response is None: | |
if (time.time() * 1000) - timestamp > 5 * 1000: | |
return False | |
return response | |
def sendReadCommand(command): | |
response = sendCommand(command) | |
try: | |
response = str(response) | |
except: | |
pass | |
return response | |
def sendControlCommand(command): | |
response = None | |
for i in range(0, 5): | |
response = sendCommand(command) | |
if response == 'OK' or response == 'ok': | |
return True | |
return False | |
# ----------------------------------------------- | |
# Main program | |
# ----------------------------------------------- | |
# connection info | |
UDP_IP = '192.168.10.1' | |
UDP_PORT = 8889 | |
last_received_command = time.time() | |
STATE_UDP_PORT = 8890 | |
address = (UDP_IP, UDP_PORT) | |
response = None | |
response_state = None | |
clientSocket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) | |
clientSocket.bind(('', UDP_PORT)) | |
stateSocket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) | |
stateSocket.bind(('', STATE_UDP_PORT)) | |
# start threads | |
recThread = threading.Thread(target=receiveData) | |
recThread.daemon = True | |
recThread.start() | |
stateThread = threading.Thread(target=readStates) | |
stateThread.daemon = True | |
stateThread.start() | |
# connect to drone | |
response = sendControlCommand("command") | |
print(f'command response: {response}') | |
response = sendControlCommand("streamon") | |
print(f'streamon response: {response}') | |
# drone information | |
battery = 0 | |
# enable face detection | |
face_cascade = cv2.CascadeClassifier('haarcascade_frontalface_default.xml') | |
# open UDP | |
print(f'opening UDP video feed, wait 2 seconds ') | |
videoUDP = 'udp://192.168.10.1:11111' | |
cap = cv2.VideoCapture(videoUDP) | |
time.sleep(2) | |
# open | |
i = 0 | |
while True: | |
i = i + 1 | |
start_time = time.time() | |
try: | |
_, frameOrig = cap.read() | |
frame = cv2.resize(frameOrig, (320, 240)) | |
gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY) | |
faces = face_cascade.detectMultiScale(gray, 1.3, 5) | |
for (top, right, bottom, left) in faces: | |
cv2.rectangle(frame,(top,right),(top+bottom,right+left),(0,0,255),2) | |
# display fps | |
if (time.time() - start_time ) > 0: | |
fpsInfo = "FPS: " + str(1.0 / (time.time() - start_time)) # FPS = 1 / time to process loop | |
font = cv2.FONT_HERSHEY_DUPLEX | |
cv2.putText(frame, fpsInfo, (10, 20), font, 0.4, (255, 255, 255), 1) | |
cv2.imshow('@elbruno - DJI Tello Camera', frame) | |
sendReadCommand('battery?') | |
print(f'battery: {battery} % - i: {i} - {fpsInfo}') | |
except Exception as e: | |
print(f'exc: {e}') | |
pass | |
if cv2.waitKey(1) & 0xFF == ord('q'): | |
break | |
response = sendControlCommand("streamoff") | |
print(f'streamon response: {response}') |
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