Error with OpenCV while creating the image_generators

[kadarshj]

I'm trying to use your google Colab Notebook to train a new model with a different alphabet i.e. included some punctuation. Version I'm using below for tensorflow & opencv:

Tensorflow v.2.5.0 opencv-python v.4.5.2 The problem : While trying your notebook I got stuck at the step where it creates the image_generators structure. More accurately, just after setting up the image_generators at this line:

See what the first validation image looks like.

`

image, lines = next(image_generators[1])

this is the error i'm getting below:

error Traceback (most recent call last) in () 31 32 # See what the first validation image looks like. ---> 33 image, lines = next(image_generators[1]) 34 text = keras_ocr.data_generation.convert_lines_to_paragraph(lines) 35 print('The first generated validation image (below) contains:', text) /usr/local/lib/python3.7/dist-packages/keras_ocr/data_generation.py in get_image_generator(height, width, font_groups, text_generator, font_size, backgrounds, background_crop_mode, rotationX, rotationY, rotationZ, margin, use_ligatures, augmenter, draw_contour, draw_contour_text) 575 permitted_contour=permitted_contour, 576 color=text_color, --> 577 draw_contour=draw_contour_text) 578 alpha = text_image[..., -1:].astype('float32') / 255 579 image = (alpha * text_image[..., :3] + (1 - alpha) * current_background).astype('uint8')

`/usr/local/lib/python3.7/dist-packages/keras_ocr/data_generation.py in draw_text_image(text, fontsize, height, width, fonts, use_ligatures, thetaX, thetaY, thetaZ, color, permitted_contour, draw_contour) 354 fontsize=max(min_character_size, 1), 355 M=M, --> 356 contour=permitted_contour) 357 start_x = transformed_contour[:, 0].min() 358 start_y = transformed_contour[:, 1].min()``

`

/usr/local/lib/python3.7/dist-packages/keras_ocr/data_generation.py in compute_transformed_contour(width, height, fontsize, M, contour, minarea) 466 x, y = slots_filtered[0][0] 467 contour = newContours[next( --> 468 index for index, contour in enumerate(newContours) 469 if cv2.pointPolygonTest(contour=contour, pt=(x, y), measureDist=False) >= 0)][:, 0, :] 470 return contour

`/usr/local/lib/python3.7/dist-packages/keras_ocr/data_generation.py in (.0) 467 contour = newContours[next( 468 index for index, contour in enumerate(newContours) --> 469 if cv2.pointPolygonTest(contour=contour, pt=(x, y), measureDist=False) >= 0)][:, 0, :] 470 return contour 471

error: OpenCV(4.5.2) -1 error: (-5:Bad argument) in function 'pointPolygonTest'

Overload resolution failed:

Can't parse 'pt'. Sequence item with index 0 has a wrong type Can't parse 'pt'. Sequence item with index 0 has a wrong type`

1. Can you please tell me which version of Tensorflow and OpenCV being used since that might be the issue ?
2. I haven't changed any line of codes. Just running and going through your colab notebook. Please can you help ?
3. Have added new alphabets. Mostly added new punctuation which required for our custom model.

[InduGirish]

Hi, Are you able to solve this issue? I'm also getting the same error, without making any change in code.

[weslst]

@kadarshj, @InduGirish, I had the same issue as you guys, downgraded opencv-python and opencv-python-headless to the version 4.4.0.44 made it work for me.

[Asad-Raza]

I had the similar issue. Downgrading the opencv-python to 4.4.0.44 worked me as well

[GMXela]

Hello Guys,

I had the same issue and 4.4.0.44 version worked for me too!

I had this problem only on my desktop computer, not on Colab.

THX guys!