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- from collections import deque
- from picamera.array import PiRGBArray
- from picamera import PiCamera
- import numpy as np
- import argparse
- import imutils
- import cv2
- # construct the argument parse and parse the arguments
- ap = argparse.ArgumentParser()
- ap.add_argument("-v", "--video",
- help="path to the (optional) video file")
- ap.add_argument("-b", "--buffer", type=int, default=64,
- help="max buffer size")
- args = vars(ap.parse_args())
- # define the lower and upper boundaries of the colors in the HSV color space
- lower = {'red':(166, 84, 141), 'green':(25, 81, 147), 'blue':(97, 100, 117)}
- upper = {'red':(186,255,255), 'green':(65,101,147), 'blue':(117,255,255)}
- # define standard colors for circle around the object
- colors = {'red':(0,0,255), 'green':(0,255,0), 'blue':(255,0,0)}
- #pts = deque(maxlen=args["buffer"])
- # enable picamera
- #camera = PiCamera()
- #camera.resolution = (320, 240)
- #camera.framerate = 60
- #rawCapture = PiRGBArray(camera, size=(320, 240))
- # if a video path was not supplied, grab the reference
- # to the webcam
- # if not args.get("video", False):
- camera = cv2.VideoCapture(0)
- # otherwise, grab a reference to the video file
- # else:
- # camera = cv2.VideoCapture(args["video"])
- while True:
- #for image in camera.capture_continuous(rawCapture, format="bgr"):
- # grab the current frame
- (grabbed, frame) = camera.read()
- # if we are viewing a video and we did not grab a frame,
- # then we have reached the end of the video
- if args.get("video") and not grabbed:
- break
- #Picamera version
- #frame = image.array
- #IP webcam image stream
- #URL = 'http://10.254.254.102:8080/shot.jpg'
- #urllib.urlretrieve(URL, 'shot1.jpg')
- #frame = cv2.imread('shot1.jpg')
- # resize the frame, blur it, and convert it to the HSV
- # color space
- frame = imutils.resize(frame, width=320)
- blurred = cv2.GaussianBlur(frame, (11, 11), 0)
- hsv = cv2.cvtColor(blurred, cv2.COLOR_BGR2HSV)
- #for each color in dictionary check object in frame
- for key, value in upper.items():
- # construct a mask for the color from dictionary`1, then perform
- # a series of dilations and erosions to remove any small
- # blobs left in the mask
- kernel = np.ones((9,9),np.uint8)
- mask = cv2.inRange(hsv, lower[key], upper[key])
- mask = cv2.morphologyEx(mask, cv2.MORPH_OPEN, kernel)
- mask = cv2.morphologyEx(mask, cv2.MORPH_CLOSE, kernel)
- cv2.imshow("Frame"+key, mask)
- # find contours in the mask and initialize the current
- # (x, y) center of the ball
- cnts = cv2.findContours(mask.copy(), cv2.RETR_EXTERNAL,
- cv2.CHAIN_APPROX_SIMPLE)[-2]
- center = None
- # only proceed if at least one contour was found
- if len(cnts) > 0:
- # find the largest contour in the mask, then use
- # it to compute the minimum enclosing circle and
- # centroid
- c = max(cnts, key=cv2.contourArea)
- ((x, y), radius) = cv2.minEnclosingCircle(c)
- M = cv2.moments(c)
- center = (int(M["m10"] / M["m00"]), int(M["m01"] / M["m00"]))
- # only proceed if the radius meets a minimum size. Correct this value for your obect's size
- if radius > 0.5:
- # draw the circle and centroid on the frame,
- # then update the list of tracked points
- cv2.circle(frame, (int(x), int(y)), int(radius), colors[key], 2)
- cv2.putText(frame,key + " ball", (int(x-radius),int(y-radius)), cv2.FONT_HERSHEY_SIMPLEX, 0.6,colors[key],2)
- # show the frame to our screen
- key = cv2.waitKey(1) & 0xFF
- # if the 'q' key is pressed, stop the loop
- if key == ord("q"):
- break
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