Some updates

* Add "Image Edge Detection" example
* Update "Video Capture" example

Author: ercanersoy

README.md

@@ -8,6 +8,7 @@ These files licensed by MIT License.
 
 * [Circle Calculator](circle-calculator)
 * [Hello World](hello-world)
+* [Image Edge Detection](image-edge-detection)
 * [Number Guess Game](number-guess-game)
 * [Random Number Generator](random-number-generator)
 * [Rock Paper Scissors](rock-paper-scissors)

image-edge-detection/.gitignore

@@ -0,0 +1 @@
+image.jpg

image-edge-detection/README.md

@@ -0,0 +1,6 @@
+# Image Edge Detection
+
+An simple image edge detection program
+Copyright (c) 2024 Ercan Ersoy
+
+This example detects edges and captures an image from first webcam.

image-edge-detection/image-edge-detection.py

@@ -0,0 +1,53 @@
+# Image Edge Detection - A simple image edge detection program
+# Copyright (c) 2024 Ercan Ersoy
+# This file licensed under MIT License.
+# Write this code using ChatGPT and GitHub CoPilot.
+
+# Imports
+import cv2
+import numpy as np
+import sys
+
+# Initialize video capture
+capture = cv2.VideoCapture(0)
+
+# Check if the webcam is opened correctly
+if not capture.isOpened():
+    # Print error message
+    print("Error: Could not open webcam.", file=sys.stderr)
+
+    # Exit the program
+    exit()
+
+ret, image = capture.read()
+
+# If frame is not read correctly
+if not ret:
+    # Print error message
+    print("Error: Failed to capture frame.", file=sys.stderr)
+
+    # Exit the program
+    exit()
+
+# Convert the image to grayscale
+image = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
+
+# Apply median blur to the image
+image = cv2.medianBlur(image, 5)
+
+# Define a kernel
+kernel = np.array([[-1, -1, -1],
+                       [-1, 9, -1],
+                       [-1, -1, -1]])
+
+# Apply the kernel to the image
+image = cv2.filter2D(image, -1, kernel)
+
+# Apply Gaussian blur to the image
+image = cv2.GaussianBlur(image, (5, 5), 0)
+
+# Apply Canny edge detection to the image
+image = cv2.Canny(image, 100, 200)
+
+# Save the image
+cv2.imwrite("image.jpg", image)

video-capture/video-capture.py

@@ -1,7 +1,7 @@
-# video Capture - An simple video capture program
+# Video Capture - An simple video capture program
 # Copyright (c) 2024 Ercan Ersoy
 # This file licensed under MIT License.
-# Write this code using ChatGPT.
+# Write this code using ChatGPT and GitHub CoPilot.
 
 # Imports
 import cv2
@@ -12,22 +12,26 @@
 
 # Check if the webcam is opened correctly
 if not capture.isOpened():
+    # Print error message
     print("Error: Could not open webcam.", file=sys.stderr)
+
+    # Exit the program
     exit()
 
 # Continuously capture frames
 while True:
     # Read the frame
     ret, frame = capture.read()
 
-    # If frame is read correctly ret is True
+    # If frame is not read correctly
     if not ret:
         print("Error: Failed to capture frame.", file=sys.stderr)
-        break
+        exit()
 
     # Display the frame
     cv2.imshow('Frame', frame)
 
+    # Wait for a key press
     key_code = cv2.waitKey(1)
 
     # Break the loop if ESC is pressed