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Mixture of OpenCV version?

asked 2018-06-13 09:39:35 -0500

I'm confused about the following code in crop_plates.py at https://github.com/openalpr/train-det...:

import os
import sys
import json
import math
import cv, cv2

... 

moment = cv.Moments(points)

...

        cv2.randu(crop_img, (0,0,0), (255,255,255))

It seems to use different version of OpenCV. But I have problems to install different OpenCV at the same time so that I change the code to only use cv2. Here comes a new question. There is no Moments function at cv2, or at least the function is different. Here is my code:

   points = [(x1,y1), (x2,y2), (x3,y3), (x4,y4)]
# moment = cv.Moments(points)
   moment = cv2.moments(points)
   centerx = int(round(moment.m10/moment.m00))
   centery = int(round(moment.m01/moment.m00))

But I got the following error message:

moment = cv2.moments(points)

TypeError: array is not a numpy array, neither a scalar

Any idea?

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My code:

points = np.array([(x1,y1), (x2,y2), (x3,y3), (x4,y4)])
moment = cv2.moments(points)
centerx = int(round(moment['m10']/moment['m00']))
centery = int(round(moment['m01']/moment['m00']))

Solved the problem.

Bagusflyer gravatar imageBagusflyer ( 2018-06-13 11:39:51 -0500 )edit

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answered 2018-06-13 09:49:10 -0500

berak gravatar image

the short answer: don't use the outdated cv api . don't use repo's which do so.

(it's already gone in opencv3, you must be using an outdated 2.4 version)

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Do you know where to find document about old Moments function? How can I use cv2.moments to replace the old function?

Bagusflyer gravatar imageBagusflyer ( 2018-06-13 09:55:03 -0500 )edit

All docs are here : choose your version!

LBerger gravatar imageLBerger ( 2018-06-13 10:22:31 -0500 )edit
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Asked: 2018-06-13 09:39:35 -0500

Seen: 23 times

Last updated: Jun 13