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MMM-Facial-Recognition-OCV3 error at tools.train.py



  • Hello

    I use the version OCV3 of face recognition.
    My problem is when I try again my face to increase the hit rate, I get the error message when typing “python tools.train.py”:

    Remember to set the name list environment variable FACE_USERS
    Reading training images…

    Assign label 1 to Alfred

    OpenCV Error: Assertion failed (ssize.width > 0 && ssize.height > 0) in resize, file /home/pi/opencv/modules/imgproc/src/imgwarp.cpp, line 3483
    Traceback (most recent call last):
    File “tools.train.py”, line 14, in
    ToolsTrain().train()
    File “/home/pi/MagicMirror/modules/MMM-Facial-Recognition-OCV3/lib/tools/train.py”, line 53, in train
    faces.append(self.prepareImage(filename))
    File “/home/pi/MagicMirror/modules/MMM-Facial-Recognition-OCV3/lib/tools/train.py”, line 29, in prepareImage
    return self.face.resize(cv2.imread(filename, cv2.IMREAD_GRAYSCALE),ToolsConfig.FACE_WIDTH, ToolsConfig.FACE_HEIGHT)
    File “/home/pi/MagicMirror/modules/MMM-Facial-Recognition-OCV3/lib/common/face.py”, line 113, in resize
    return cv2.resize(image, (face_width, face_height), interpolation=cv2.INTER_LANCZOS4)
    cv2.error: /home/pi/opencv/modules/imgproc/src/imgwarp.cpp:3483: error: (-215) ssize.width > 0 && ssize.height > 0 in function resize

    please help



  • Bump! Same error message.

    @alfi153 said in MMM-Facial-Recognition-OCV3 error at tools.train.py:

    Hello

    I use the version OCV3 of face recognition.
    My problem is when I try again my face to increase the hit rate, I get the error message when typing “python tools.train.py”:

    Remember to set the name list environment variable FACE_USERS
    Reading training images…

    Assign label 1 to Alfred

    OpenCV Error: Assertion failed (ssize.width > 0 && ssize.height > 0) in resize, file /home/pi/opencv/modules/imgproc/src/imgwarp.cpp, line 3483
    Traceback (most recent call last):
    File “tools.train.py”, line 14, in
    ToolsTrain().train()
    File “/home/pi/MagicMirror/modules/MMM-Facial-Recognition-OCV3/lib/tools/train.py”, line 53, in train
    faces.append(self.prepareImage(filename))
    File “/home/pi/MagicMirror/modules/MMM-Facial-Recognition-OCV3/lib/tools/train.py”, line 29, in prepareImage
    return self.face.resize(cv2.imread(filename, cv2.IMREAD_GRAYSCALE),ToolsConfig.FACE_WIDTH, ToolsConfig.FACE_HEIGHT)
    File “/home/pi/MagicMirror/modules/MMM-Facial-Recognition-OCV3/lib/common/face.py”, line 113, in resize
    return cv2.resize(image, (face_width, face_height), interpolation=cv2.INTER_LANCZOS4)
    cv2.error: /home/pi/opencv/modules/imgproc/src/imgwarp.cpp:3483: error: (-215) ssize.width > 0 && ssize.height > 0 in function resize

    please help



  • @SdeGeata Anyone got an answer to this one? I’m still stuck on this.



  • @alfi153
    Do you tried what are in the docu?

    Test your trained model
    Make sure your training.xml from running train.py is in this directory
    Specify your user labels in the environment with
    
    export FACE_USERS=name1,name2,name3
    
    Run python tools.facerecognition.py to test your trained model.
    


  • @nischi

    Hello Nischi;

    Only got as far as “python tools.train.py”. That is what generates the error and it doesn’t generate the XML file that it should, so I can’t verify my training.

    Everything up until then is fine, and there are two named folders in the specified folder (training_data/) with pics of myself and my girlfriend. These photos were already processed by the previous function; “python tools.capture.py”. I don’t know why its bugging.



  • @SdeGeata
    It seems he can’t resize the image for some reason. Have you checked all your pictures that nothing is corrupt and have you checked that your python has access to the files as well?



  • @nischi

    Yeah, all the photos load fine in preview app and they were all found, formatted and placed in the folder by the previous step. I don’t know why it is having a problem.