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August 29, 2015 13:57
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Video Filtering
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| import cv2 | |
| import numpy | |
| import sys | |
| # python hsv_filter.py minH minS minV maxH maxS maxV | |
| if __name__=="__main__": | |
| defaultHSV = [0,0,0,255,255,255] | |
| hsvArgs = sys.argv[1:] | |
| if len(hsvArgs) < 6: | |
| hsvArgs = defaultHSV | |
| try: | |
| hsvArgs = map(int, hsvArgs) | |
| except: | |
| hsvArgs = defaultHSV | |
| minHSV = numpy.array([hsvArgs[0], hsvArgs[1], hsvArgs[2]]) | |
| maxHSV = numpy.array([hsvArgs[3], hsvArgs[4], hsvArgs[5]]) | |
| captureObject = cv2.VideoCapture(0) | |
| VideoObject = cv2.VideoWriter('hsv_filtering_video.avi', | |
| cv2.cv.CV_FOURCC('M','J','P','G'), 25, (640,480)) | |
| x = cv2.waitKey(5) | |
| while (x != 27 and x == -1): | |
| x = cv2.waitKey(5) | |
| _,image = captureObject.read() | |
| hsvImage = cv2.cvtColor(image, cv2.COLOR_BGR2HSV) | |
| filteredImage = cv2.inRange(hsvImage, minHSV, maxHSV) | |
| cv2.imshow('Filtered Image', filteredImage) | |
| # open cv having problem writing image to video as returned by cv2.inRange | |
| # so save image to temp image, and then reread and write to vide | |
| cv2.imwrite('temp_hsv_image.jpg', filteredImage) | |
| videoImage = cv2.imread('temp_hsv_image.jpg') | |
| VideoObject.write(videoImage) | |
| cv2.destroyAllWindows() | |
| VideoObject.release() |
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