Merge pull request #1587 from raj3000k/master

Added Heart Rate Detection using OpenCV(webcam).

Author: avinashkranjan

HeartRate-Detection-OpenC-py/HeartRate.py

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+import numpy as np
+from matplotlib import pyplot as plt
+import cv2
+import io
+import time
+# Camera stream
+cap = cv2.VideoCapture(0)
+cap.set(cv2.CAP_PROP_FRAME_WIDTH, 1920)
+cap.set(cv2.CAP_PROP_FRAME_HEIGHT, 1280)
+cap.set(cv2.CAP_PROP_FPS, 30)
+# Video stream (optional, not tested)
+# cap = cv2.VideoCapture("video.mp4")
+# Image crop
+x, y, w, h = 800, 500, 100, 100
+x, y, w, h = 950, 300, 100, 100
+heartbeat_count = 128
+heartbeat_values = [0]*heartbeat_count
+heartbeat_times = [time.time()]*heartbeat_count
+# Matplotlib graph surface 
+fig = plt.figure()
+ax = fig.add_subplot(111)
+while True:
+    # Capture frame-by-frame
+    ret, frame = cap.read()
+    img = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
+    crop_img = img[y:y + h, x:x + w]
+    # Update the data
+    heartbeat_values = heartbeat_values[1:] + [np.average(crop_img)]
+    heartbeat_times = heartbeat_times[1:] + [time.time()]
+    # Draw matplotlib graph to numpy array
+    ax.plot(heartbeat_times, heartbeat_values)
+    fig.canvas.draw()
+    plot_img_np = np.fromstring(fig.canvas.tostring_rgb(),
+                                dtype=np.uint8, sep='')
+    plot_img_np = plot_img_np.reshape(fig.canvas.get_width_height()[::-1] + (3,))
+    plt.cla()
+    # Display the frames
+    cv2.imshow('Crop', crop_img)
+    cv2.imshow('Graph', plot_img_np)
+    if cv2.waitKey(1) & 0xFF == ord('q'):
+        break
+cap.release()
+cv2.destroyAllWindows()

HeartRate-Detection-OpenC-py/SS-heratGraph.png

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+# **Heart Rate Detection**
+
+- Heart Rate detection using the eye's movement, OpenCV and various algorithms.
+
+# Requirements
+
+```
+- pip install -U pip
+- pip install -U matplotlib
+- pip install opencv-python
+- pip install numpy
+```
+
+# Sample Image-
+
+![Alt text](./SS-heratGraph.png)
+
+# Video-
+
+[![Watch the video](./click%20Here.jpeg)](./SampleVideo-HeartRate-Detection-Raj%20Motwani.mp4)
+
+# Author -
+
+- **_Raj Motwani_**
+
+  - <a href="https://www.linkedin.com/in/raj-motwani-978143204/" target="_blank">LinkedIn</a>
+
+  - <a href="https://github.com/raj3000k" target="_blank">GitHub</a>