Is it possible to implement a streaming http server whilst working in image processing in opencv2?
eg
#!/usr/bin/env python
import numpy as np
import cv2
runtime_frame_count = 0
vid = cv2.VideoCapture(0)
vid.set(3,800)
vid.set(4,600)
while True:
ret, img = vid.read()
#-----send contents of img to a streaming http server, for access from browser------
runtime_frame_count = runtime_frame_count + 1
print (runtime_frame_count)
# ------ do some other stuff on img in opencv2------------
cv2.imshow("input",img)
key = cv2.waitKey(10)
key = cv2.waitKey(10)
key = cv2.waitKey(10)
if (key == 27) or (runtime_frame_count == 100):
break
cv2.destroyAllWindows()
vid.release()
=================edit==========================================================================edit===========================================
Following Berak's kind suggestion, Iv'e managed to process an opencv image and serve it to a webpage.
class CamHandler(BaseHTTPRequestHandler):
def do_GET(self):
print (self.path)
if self.path.endswith('.mjpg'):
self.send_response(200)
self.send_header('Content-type','multipart/x-mixed-replace; boundary=--jpgboundary')
self.end_headers()
while(True):# infinite loop with no exit condition
rc,img = capture.read()
if not rc:
continue
if rc:
#========send img to the cv_frame() function for CV2 operations======
imgRGB = cv_frame(img) # contains all the opencv stuff i want to perform
#=====================================================================
#=============================================================
#imgRGB = cv2.cvtColor(img,cv2.COLOR_BGR2RGB)
r, buf = cv2.imencode(".jpg",imgRGB)
self.wfile.write("--jpgboundary\r\n")
self.send_header('Content-type','image/jpeg')
self.send_header('Content-length',str(len(buf)))
self.end_headers()
self.wfile.write(bytearray(buf))
self.wfile.write('\r\n')
time.sleep(0.01)
k = cv2.waitKey(20)
if k == 27:
break
cv2.destroyAllWindows()
capture.release()
return
if self.path.endswith('.html') or self.path=="/":
self.send_response(200)
self.send_header('Content-type','text/html')
self.end_headers()
self.wfile.write('<html><head></head><body>')
self.wfile.write('<img src="http://'+socket.gethostbyname(socket.gethostname())+':'+ str(port) +'/cam.mjpg"/>')
self.wfile.write('</body></html>')
return
def main():
global capture, average
capture = cv2.VideoCapture(0)
capture.set(3,800)
capture.set(4,600)
while(1):
server = HTTPServer(('',port),CamHandler)
print ("server started on: ")
print(socket.gethostbyname(socket.gethostname()))
CamHandler.BaseHTTPServer.BaseHTTPRequestHandler("GET", (internalipaddress ,portnumber), CamHandler)
server.handle_request()
k = cv2.waitKey(20)
if k == ord('q'):
capture.release()
server.socket.close()
print("server stopped")
cv2.destroyAllWindows()
break
return
main()
However, to get the code to run, I have to go to my web browser and request the webpage "localhost:port\" or "localhost:port.html"
Is there a way to call the method "def do_GET()" using python, so the cv_frame(img) function runs all the time?
I cannot work out how to run the function 'cv_frame(img)' all the time, regardless of the server situation.
