OpenCV NoneType object has no attribute shape

Question

Hello I m working on Raspberry Pi with OpenCV  I want to try a tutorial which is ball tracking in link http   www pyimagesearch com 2015 09 14 ball-tracking-with-opencv   But when I compile it  i get an error   NoneType  object has no attribute  shape    What should I do

User · Answer

This is because the path of image is wrong or the name of image you write is incorrect .

how to check? first try to print the image using print(img) if it prints 'None' that means you have given wrong image path correct that path and try again.

User · Answer

I faced the same problem today  please check for the path of the image as mentioned by cybseccrypt  After imread  try printing the image and see  If you get a value  it means the file is open   Code   img src   cv2 imread   home deepak python-workout box2 jpg  0   print img src  Hope this helps

User · Answer

I have also met this issue and wasted a lot of time debugging it   First  make sure that the path you provide is valid  i e   there is an image in that path   Next  you should be aware that Opencv doesn t support image paths which contain unicode characters  see ref   If your image path contains Unicode characters  you can use the following code to read the image   import numpy as np import cv2    img is in BGR format if the underlying image is a color image img   cv2 imdecode np fromfile im path  dtype np uint8   cv2 IMREAD UNCHANGED

User · Answer

I had this issue with cap   cv2 VideoCapture 0   I changed this to cap   cv2 VideoCapture 1  and then it worked  Since it wasn t linked to the right webcam it was returning nothing  Maybe this will help good luck

User · Answer

I just meet a same problem  I solve it by updating the newest version of OpenCV  It works well with me  Hope it is also ok with you

User · Answer

You probably get the error because your video path may be wrong in a way  Be sure your path is completely correct

User · Answer

I also face the same issue  OpenCV NoneType object has no attribute shape  and i solve this by changing the image location  I also use the PyCharm IDE  Currently my image location and class file in the same folder

User · Answer

It means that somewhere a function which should return a image just returned None  and therefore has no shape attribute  Try      print img  to check if your image is None or an actual numpy object

User · Answer

I work with artificially created images i e  I create them by myself and then train a neural network on them to perform a certain task  So  I created these images  saved them  but when I tried to open them   with cv2 imread        I got this error It turned out that when saving artificially created images you need to add dtype np uint8  That resolved the issue for me

User · Answer

Hope this helps anyone facing same issue  To know exactly where has occurred  since the running program doesn t mention it as a error with line number   NoneType  object has no attribute  shape   Make sure to add assert after loading the image frame  For image   image   cv2 imread  myimage png   assert not isinstance image type None     image not found    For video  cap   cv2 VideoCapture 0       while cap isOpened                Capture frame-by-frame         ret  frame   cap read           if ret              assert not isinstance frame type None     frame not found    Helped me solve a similar issue  in a long script

User · Answer

try to handle the error  its an attribute error given by OpenCV  try      img shape     print  checked for shape  format img shape   except AttributeError      print  shape not found        code to move to next frame

User · Answer

I had the same problem  I had another program open that was using my laptop s camera  So I closed that program  and then everything worked  I found this answer by checking https   howto streamlabs com streamlabs-obs-9 black-screen-when-using-video-capture-device-elgato-hd-60s-9508

[python] OpenCV NoneType object has no attribute shape

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