Python) Multiple-Color-Detection-in-Real-Time-using-Python-OpenCV

	# Python code for Multiple Color Detection
	import numpy as np
	import cv2
	# Capturing video through webcam
	webcam = cv2.VideoCapture(0)
	# Start a while loop
	while(1):
	# Reading the video from the
	# webcam in image frames
	_, imageFrame = webcam.read()
	# Convert the imageFrame in
	# BGR(RGB color space) to
	# HSV(hue-saturation-value)
	# color space
	hsvFrame = cv2.cvtColor(imageFrame, cv2.COLOR_BGR2HSV)
	# Set range for red color and
	# define mask
	red_lower = np.array([136, 87, 111], np.uint8)
	red_upper = np.array([180, 255, 255], np.uint8)
	red_mask = cv2.inRange(hsvFrame, red_lower, red_upper)
	# Set range for green color and
	# define mask
	green_lower = np.array([25, 52, 72], np.uint8)
	green_upper = np.array([102, 255, 255], np.uint8)
	green_mask = cv2.inRange(hsvFrame, green_lower, green_upper)
	# Set range for blue color and
	# define mask
	blue_lower = np.array([94, 80, 2], np.uint8)
	blue_upper = np.array([120, 255, 255], np.uint8)
	blue_mask = cv2.inRange(hsvFrame, blue_lower, blue_upper)
	# Morphological Transform, Dilation
	# for each color and bitwise_and operator
	# between imageFrame and mask determines
	# to detect only that particular color
	kernal = np.ones((5, 5), "uint8")
	# For red color
	red_mask = cv2.dilate(red_mask, kernal)
	res_red = cv2.bitwise_and(imageFrame, imageFrame,
	mask = red_mask)
	# For green color
	green_mask = cv2.dilate(green_mask, kernal)
	res_green = cv2.bitwise_and(imageFrame, imageFrame,
	mask = green_mask)
	# For blue color
	blue_mask = cv2.dilate(blue_mask, kernal)
	res_blue = cv2.bitwise_and(imageFrame, imageFrame,
	mask = blue_mask)
	# Creating contour to track red color
	contours, hierarchy = cv2.findContours(red_mask,
	cv2.RETR_TREE,
	cv2.CHAIN_APPROX_SIMPLE)
	for pic, contour in enumerate(contours):
	area = cv2.contourArea(contour)
	if(area > 300):
	x, y, w, h = cv2.boundingRect(contour)
	imageFrame = cv2.rectangle(imageFrame, (x, y),
	(x + w, y + h),
	(0, 0, 255), 2)
	cv2.putText(imageFrame, "Red Colour", (x, y),
	cv2.FONT_HERSHEY_SIMPLEX, 1.0,
	(0, 0, 255))
	# Creating contour to track green color
	contours, hierarchy = cv2.findContours(green_mask,
	cv2.RETR_TREE,
	cv2.CHAIN_APPROX_SIMPLE)
	for pic, contour in enumerate(contours):
	area = cv2.contourArea(contour)
	if(area > 300):
	x, y, w, h = cv2.boundingRect(contour)
	imageFrame = cv2.rectangle(imageFrame, (x, y),
	(x + w, y + h),
	(0, 255, 0), 2)
	cv2.putText(imageFrame, "Green Colour", (x, y),
	cv2.FONT_HERSHEY_SIMPLEX,
	1.0, (0, 255, 0))
	# Creating contour to track blue color
	contours, hierarchy = cv2.findContours(blue_mask,
	cv2.RETR_TREE,
	cv2.CHAIN_APPROX_SIMPLE)
	for pic, contour in enumerate(contours):
	area = cv2.contourArea(contour)
	if(area > 300):
	x, y, w, h = cv2.boundingRect(contour)
	imageFrame = cv2.rectangle(imageFrame, (x, y),
	(x + w, y + h),
	(255, 0, 0), 2)
	cv2.putText(imageFrame, "Blue Colour", (x, y),
	cv2.FONT_HERSHEY_SIMPLEX,
	1.0, (255, 0, 0))
	# Program Termination
	cv2.imshow("Multiple Color Detection in Real-TIme", imageFrame)
	if cv2.waitKey(10) & 0xFF == ord('q'):
	cap.release()
	cv2.destroyAllWindows()
	break

view raw gistfile1.txt hosted with ❤ by GitHub