created Gesture Volume Control

Computer Vision/Gesture-Volume-Control/README.md

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+
+<div align="center">
+  <h1>Gesture Volume Control Using OpenCV and MediaPipe</h1>
+  <img alt="output" src="images/output.gif" />
+ </div>
+
+
+https://github.com/user-attachments/assets/3ea5868c-73c8-444f-94ee-47b689e4ae73
+
+
+> This Project uses OpenCV and MediaPipe to Control system volume 
+
+## 💾 REQUIREMENTS
++ opencv-python
++ mediapipe
++ comtypes
++ numpy
++ pycaw
+
+```bash
+pip install -r requirements.txt
+```
+***
+### MEDIAPIPE
+> MediaPipe offers open source cross-platform, customizable ML solutions for live and streaming media.
+
+#### Hand Landmark Model
+After the palm detection over the whole image our subsequent hand landmark model performs precise keypoint localization of 21 3D hand-knuckle coordinates inside the detected hand regions via regression, that is direct coordinate prediction. The model learns a consistent internal hand pose representation and is robust even to partially visible hands and self-occlusions.
+
+To obtain ground truth data, we have manually annotated ~30K real-world images with 21 3D coordinates, as shown below (we take Z-value from image depth map, if it exists per corresponding coordinate). To better cover the possible hand poses and provide additional supervision on the nature of hand geometry, we also render a high-quality synthetic hand model over various backgrounds and map it to the corresponding 3D coordinates.<br>
+
+#### Solution APIs
+##### Configuration Options
+> Naming style and availability may differ slightly across platforms/languages.
+
++ <b>STATIC_IMAGE_MODE</b><br>
+If set to false, the solution treats the input images as a video stream. It will try to detect hands in the first input images, and upon a successful detection further localizes the hand landmarks. In subsequent images, once all max_num_hands hands are detected and the corresponding hand landmarks are localized, it simply tracks those landmarks without invoking another detection until it loses track of any of the hands. This reduces latency and is ideal for processing video frames. If set to true, hand detection runs on every input image, ideal for processing a batch of static, possibly unrelated, images. Default to false.
+
++ <b>MAX_NUM_HANDS</b><br>
+Maximum number of hands to detect. Default to 2.
+
++ <b>MODEL_COMPLEXITY</b><br>
+Complexity of the hand landmark model: 0 or 1. Landmark accuracy as well as inference latency generally go up with the model complexity. Default to 1.
+
++ <b>MIN_DETECTION_CONFIDENCE</b><br>
+Minimum confidence value ([0.0, 1.0]) from the hand detection model for the detection to be considered successful. Default to 0.5.
+
++ <b>MIN_TRACKING_CONFIDENCE:</b><br>
+Minimum confidence value ([0.0, 1.0]) from the landmark-tracking model for the hand landmarks to be considered tracked successfully, or otherwise hand detection will be invoked automatically on the next input image. Setting it to a higher value can increase robustness of the solution, at the expense of a higher latency. Ignored if static_image_mode is true, where hand detection simply runs on every image. Default to 0.5.
+
+<br>
+
+Source: [MediaPipe Hands Solutions](https://google.github.io/mediapipe/solutions/hands#python-solution-api)
+
+
+
+
+## 📝 CODE EXPLANATION
+<b>Importing Libraries</b>
+```py
+import cv2
+import mediapipe as mp
+import math
+import numpy as np
+from ctypes import cast, POINTER
+from comtypes import CLSCTX_ALL
+from pycaw.pycaw import AudioUtilities, IAudioEndpointVolume
+```
+***
+Solution APIs 
+```py
+mp_drawing = mp.solutions.drawing_utils
+mp_drawing_styles = mp.solutions.drawing_styles
+mp_hands = mp.solutions.hands
+```
+***
+
+Volume Control Library Usage 
+```py
+devices = AudioUtilities.GetSpeakers()
+interface = devices.Activate(IAudioEndpointVolume._iid_, CLSCTX_ALL, None)
+volume = cast(interface, POINTER(IAudioEndpointVolume))
+```
+***
+Getting Volume Range using `volume.GetVolumeRange()` Method
+```py
+volRange = volume.GetVolumeRange()
+minVol , maxVol , volBar, volPer= volRange[0] , volRange[1], 400, 0
+```
+***
+Setting up webCam using OpenCV
+```py
+wCam, hCam = 640, 480
+cam = cv2.VideoCapture(0)
+cam.set(3,wCam)
+cam.set(4,hCam)
+```
+***
+Using MediaPipe Hand Landmark Model for identifying Hands 
+```py
+with mp_hands.Hands(
+    model_complexity=0,
+    min_detection_confidence=0.5,
+    min_tracking_confidence=0.5) as hands:
+
+  while cam.isOpened():
+    success, image = cam.read()
+
+    image = cv2.cvtColor(image, cv2.COLOR_BGR2RGB)
+    results = hands.process(image)
+    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()
+            )
+```
+***
+Using multi_hand_landmarks method for Finding postion of Hand landmarks
+```py
+lmList = []
+    if results.multi_hand_landmarks:
+      myHand = results.multi_hand_landmarks[0]
+      for id, lm in enumerate(myHand.landmark):
+        h, w, c = image.shape
+        cx, cy = int(lm.x * w), int(lm.y * h)
+        lmList.append([id, cx, cy])    
+```
+***
+Assigning variables for Thumb and Index finger position
+```py
+if len(lmList) != 0:
+      x1, y1 = lmList[4][1], lmList[4][2]
+      x2, y2 = lmList[8][1], lmList[8][2]
+```
+***
+Marking Thumb and Index finger using `cv2.circle()` and Drawing a line between them using `cv2.line()`
+```py
+cv2.circle(image, (x1,y1),15,(255,255,255))  
+cv2.circle(image, (x2,y2),15,(255,255,255))  
+cv2.line(image,(x1,y1),(x2,y2),(0,255,0),3)
+length = math.hypot(x2-x1,y2-y1)
+if length < 50:
+    cv2.line(image,(x1,y1),(x2,y2),(0,0,255),3)
+```
+***
+Converting Length range into Volume range using `numpy.interp()`
+```py
+vol = np.interp(length, [50, 220], [minVol, maxVol])
+```
+***
+Changing System Volume using `volume.SetMasterVolumeLevel()` method
+```py
+volume.SetMasterVolumeLevel(vol, None)
+volBar = np.interp(length, [50, 220], [400, 150])
+volPer = np.interp(length, [50, 220], [0, 100])
+```
+***
+Drawing Volume Bar using `cv2.rectangle()` method
+```py
+cv2.rectangle(image, (50, 150), (85, 400), (0, 0, 0), 3)
+cv2.rectangle(image, (50, int(volBar)), (85, 400), (0, 0, 0), cv2.FILLED)
+cv2.putText(image, f'{int(volPer)} %', (40, 450), cv2.FONT_HERSHEY_COMPLEX,
+        1, (0, 0, 0), 3)}
+
+```
+***
+Displaying Output using `cv2.imshow` method
+```py
+cv2.imshow('handDetector', image) 
+    if cv2.waitKey(1) & 0xFF == ord('q'):
+      break
+```
+***
+Closing webCam
+```py
+cam.release()
+```
+***
+
+

Computer Vision/Gesture-Volume-Control/main.py

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+import cv2
+import mediapipe as mp
+import math
+import numpy as np
+from ctypes import cast, POINTER
+from comtypes import CLSCTX_ALL
+from pycaw.pycaw import AudioUtilities, IAudioEndpointVolume
+
+# solution APIs
+mp_drawing = mp.solutions.drawing_utils
+mp_drawing_styles = mp.solutions.drawing_styles
+mp_hands = mp.solutions.hands
+
+# Volume Control Library Usage 
+devices = AudioUtilities.GetSpeakers()
+interface = devices.Activate(IAudioEndpointVolume._iid_, CLSCTX_ALL, None)
+volume = cast(interface, POINTER(IAudioEndpointVolume))
+volRange = volume.GetVolumeRange()
+minVol , maxVol , volBar, volPer= volRange[0] , volRange[1], 400, 0
+
+# Webcam Setup
+wCam, hCam = 640, 480
+cam = cv2.VideoCapture(0)
+cam.set(3,wCam)
+cam.set(4,hCam)
+
+# Mediapipe Hand Landmark Model
+with mp_hands.Hands(
+    model_complexity=0,
+    min_detection_confidence=0.5,
+    min_tracking_confidence=0.5) as hands:
+
+  while cam.isOpened():
+    success, image = cam.read()
+
+    image = cv2.cvtColor(image, cv2.COLOR_BGR2RGB)
+    results = hands.process(image)
+    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()
+            )
+
+    # multi_hand_landmarks method for Finding postion of Hand landmarks      
+    lmList = []
+    if results.multi_hand_landmarks:
+      myHand = results.multi_hand_landmarks[0]
+      for id, lm in enumerate(myHand.landmark):
+        h, w, c = image.shape
+        cx, cy = int(lm.x * w), int(lm.y * h)
+        lmList.append([id, cx, cy])          
+
+    # Assigning variables for Thumb and Index finger position
+    if len(lmList) != 0:
+      x1, y1 = lmList[4][1], lmList[4][2]
+      x2, y2 = lmList[8][1], lmList[8][2]
+
+      # Marking Thumb and Index finger
+      cv2.circle(image, (x1,y1),15,(255,255,255))  
+      cv2.circle(image, (x2,y2),15,(255,255,255))   
+      cv2.line(image,(x1,y1),(x2,y2),(0,255,0),3)
+      length = math.hypot(x2-x1,y2-y1)
+      if length < 50:
+        cv2.line(image,(x1,y1),(x2,y2),(0,0,255),3)
+
+      vol = np.interp(length, [50, 220], [minVol, maxVol])
+      volume.SetMasterVolumeLevel(vol, None)
+      volBar = np.interp(length, [50, 220], [400, 150])
+      volPer = np.interp(length, [50, 220], [0, 100])
+
+      # Volume Bar
+      cv2.rectangle(image, (50, 150), (85, 400), (0, 0, 0), 3)
+      cv2.rectangle(image, (50, int(volBar)), (85, 400), (0, 0, 0), cv2.FILLED)
+      cv2.putText(image, f'{int(volPer)} %', (40, 450), cv2.FONT_HERSHEY_COMPLEX,
+                1, (0, 0, 0), 3)
+
+    cv2.imshow('handDetector', image) 
+    if cv2.waitKey(1) & 0xFF == ord('q'):
+      break
+cam.release()

Computer Vision/Gesture-Volume-Control/requirements.txt

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+opencv-python
+mediapipe
+comtypes
+numpy
+pycaw