121 lines
3.8 KiB
Python
121 lines
3.8 KiB
Python
from imutils.video import VideoStream
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import argparse
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import datetime
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import imutils
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import time
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import cv2
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import os
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import numpy as np
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import traceback
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import _thread
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import imageio
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import numpy as np
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class ContourExtractor:
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#X = {frame_number: [(contour, (x,y,w,h)), ...], }
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extractedContours = dict()
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min_area = 500
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max_area = 7000
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threashold = 13
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xDim = 0
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yDim = 0
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def getextractedContours(self):
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return self.extractedContours
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def __init__(self):
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print("ContourExtractor initiated")
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def extractContours(self, videoPath, resizeWidth):
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min_area = self.min_area
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max_area = self.max_area
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threashold = self.threashold
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# initialize the first frame in the video stream
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vs = cv2.VideoCapture(videoPath)
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res, image = vs.read()
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self.xDim = image.shape[1]
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self.yDim = image.shape[0]
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firstFrame = None
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# loop over the frames of the video
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frameCount = 0
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extractedContours = dict()
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while res:
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res, frame = vs.read()
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# resize the frame, convert it to grayscale, and blur it
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if frame is None:
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print("ContourExtractor: frame was None")
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break
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frame = imutils.resize(frame, width=resizeWidth)
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gray = cv2.cvtColor(frame, cv2.COLOR_BGR2LAB)
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gray = np.asarray(gray[:,:,1]/2 + gray[:,:,2]/2).astype(np.uint8)
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#gray = cv2.GaussianBlur(gray, (5, 5), 0)
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# if the first frame is None, initialize it
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if firstFrame is None:
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firstFrame = gray
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continue
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frameDelta = cv2.absdiff(gray, firstFrame)
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thresh = cv2.threshold(frameDelta, threashold, 255, cv2.THRESH_BINARY)[1]
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# dilate the thresholded image to fill in holes, then find contours
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thresh = cv2.dilate(thresh, None, iterations=3)
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cnts = cv2.findContours(thresh.copy(), cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)
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cnts = imutils.grab_contours(cnts)
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contours = []
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for c in cnts:
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ca = cv2.contourArea(c)
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if ca < min_area or ca > max_area:
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continue
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(x, y, w, h) = cv2.boundingRect(c)
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#print((x, y, w, h))
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contours.append((x, y, w, h))
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#cv2.rectangle(frame, (x, y), (x + w, y + h), (0, 255, 0), 2)
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if len(contours) != 0:
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extractedContours[frameCount] = contours
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if frameCount % (60*30) == 0:
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print("Minutes processed: ", frameCount/(60*30))
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frameCount += 1
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#cv2.imshow( "annotated", thresh )
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#cv2.waitKey(10) & 0XFF
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self.extractedContours = extractedContours
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return extractedContours
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def displayContours(self):
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values = self.extractedContours.values()
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for xx in values:
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for v1 in xx:
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(x, y, w, h) = v1[1]
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v = v1[0]
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frame = np.zeros(shape=[self.yDim, self.xDim, 3], dtype=np.uint8)
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frame = imutils.resize(frame, width=512)
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frame[y:y+v.shape[0], x:x+v.shape[1]] = v
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cv2.imshow("changes overlayed", frame)
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cv2.waitKey(10) & 0XFF
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cv2.destroyAllWindows()
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def exportContours(self):
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values = self.extractedContours.values()
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frames = []
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for xx in values:
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for v1 in xx:
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(x, y, w, h) = v1[1]
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v = v1[0]
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frame = np.zeros(shape=[self.yDim, self.xDim, 3], dtype=np.uint8)
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frame = imutils.resize(frame, width=512)
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frame[y:y+v.shape[0], x:x+v.shape[1]] = v
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frames.append(frame)
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return frames
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