Hi Everyone, I'm converting some python code from opencv version 3.4 to 4.1. The code uses the DISOpticalFlow algorithm (https://docs.opencv.org/4.1.0/de/d4f/...) but the interface to this class seems to have changed. If anyone has used the DIS optical flow in V4.1 in a python code I would appreciate an example snippet.
Thanks, Dave
Yes, you're right, here's a version that works in 4.1
import cv2
if __name__ == '__main__':
print('cv2 version: {}'.format(cv2.__version__))
img1 = cv2.imread('test_1.png')
img2 = cv2.imread('test_2.png')
gray1 = cv2.cvtColor(img1, cv2.COLOR_BGR2GRAY)
gray2 = cv2.cvtColor(img2, cv2.COLOR_BGR2GRAY)
# 3.4.4.19
#inst = cv2.optflow.createOptFlow_DIS(cv2.optflow.DISOPTICAL_FLOW_PRESET_MEDIUM)
# 4.1
inst = cv2.DISOpticalFlow_create(cv2.DISOPTICAL_FLOW_PRESET_MEDIUM)
flow = inst.calc(gray1, gray2, None)
Asked: 2019-05-14 18:29:18 -0600
Seen: 2,737 times
Last updated: May 14 '19
can you be a bit more specific ? which errors do you get ? show your code ?
Yes sorry, here is a minimal example that works in 3.4.4.19:
When running this with V4.1 I get:
Traceback (most recent call last): File "dis_minimal.py", line 13, in <module> inst = cv2.optflow.createOptFlow_DIS(cv2.optflow.DISOPTICAL_FLOW_PRESET_MEDIUM) AttributeError: module 'cv2.optflow' has no attribute 'createOptFlow_DIS'
strike the
.optflow, it was moved into main opencv repo recently.