add mediapipehands exemple

code/backend_reconaissance/Dockerfile

@@ -5,7 +5,11 @@ ENV PYTHONDONTWRITEBYTECODE=1
 #Afficher les logs directement dans le terminal
 ENV PYTHONUNBUFFERED=1
 
-# Installation des dépendances
+#Installation des dépendances de opencv (TODO: supprimer si plus besoin)
+RUN apt-get update
+RUN apt-get install ffmpeg libsm6 libxext6  -y
+
+# Installation des dépendances python
 COPY requirements.txt .
 RUN python -m pip install -r requirements.txt
 

code/backend_reconaissance/hands.py

@@ -0,0 +1,45 @@
+import cv2
+import mediapipe as mp
+mp_drawing = mp.solutions.drawing_utils
+mp_drawing_styles = mp.solutions.drawing_styles
+mp_hands = mp.solutions.hands
+
+# For webcam input:
+# cap = cv2.VideoCapture("dev/v4l/by-path/pci-0000:04:00.3-usb-0:4:1.0-video-index0")
+cap = cv2.VideoCapture(0)
+hands = mp_hands.Hands(
+    model_complexity=0,
+    min_detection_confidence=0.5,
+    min_tracking_confidence=0.5)
+
+def frame():
+  if cap.isOpened():
+    success, image = cap.read()
+    if not success:
+      print("Ignoring empty camera frame.")
+      # If loading a video, use 'break' instead of 'continue'.
+      return
+
+    # To improve performance, optionally mark the image as not writeable to
+    # pass by reference.
+    image.flags.writeable = False
+    image = cv2.cvtColor(image, cv2.COLOR_BGR2RGB)
+    results = hands.process(image)
+
+    # Draw the hand annotations on the image.
+    image.flags.writeable = True
+    image = cv2.cvtColor(image, cv2.COLOR_RGB2BGR)
+    if results.multi_hand_landmarks:
+      for hand_landmarks in results.multi_hand_landmarks:
+        mp_drawing.draw_landmarks(
+            image,
+            hand_landmarks,
+            mp_hands.HAND_CONNECTIONS,
+            mp_drawing_styles.get_default_hand_landmarks_style(),
+            mp_drawing_styles.get_default_hand_connections_style())
+    # Flip the image horizontally for a selfie-view display.
+    # cv2.imshow('MediaPipe Hands', cv2.flip(image, 1))
+    if cv2.waitKey(5) & 0xFF == 27:
+      return
+# cap.release()
+

code/backend_reconaissance/main.py

@@ -3,6 +3,7 @@ import json
 import websockets
 import random
 import os
+import hands
 
 class WebsocketServer:
     def __init__(self,getEffects,port=os.getenv("PORT"),host=os.getenv("HOST")) -> None:
@@ -18,6 +19,7 @@ class WebsocketServer:
     async def handler(self,websocket):
         while True:
             messages = self.getEffects()
+            hands.frame()
             await websocket.send(json.dumps(messages))
             await asyncio.sleep(1/30)
 

code/backend_reconaissance/requirements.txt

@@ -1,2 +1,4 @@
 websockets
-requests
+requests
+opencv-python
+mediapipe