Invalid Image Errors.

[jerinphilip]

• [x] Height is zero. Width is not. ZeroDivisionError.

  Traceback (most recent call last):
  File "experiment.py", line 92, in <module>
  sd = stats(ocr, D, book_dir)
  File "experiment.py", line 15, in stats
  pagewise = webtotrain.read_book(book_dir)
  File "/OCRData2/ocr/retrain/src/aux/webtotrain.py", line 122, in read_book
  pagewise = images_and_truths(ud, word_mapping_f)
  File "/OCRData2/ocr/retrain/src/aux/webtotrain.py", line 96, in images_and_truths
  atom_images = extract_atoms(prefix+imgloc, atoms)
  File "/OCRData2/ocr/retrain/src/aux/webtotrain.py", line 65, in extract_atoms
  atomImages = list(map(extract_atom_image, atoms))
  File "/OCRData2/ocr/retrain/src/aux/webtotrain.py", line 60, in extract_atom_image
  ratio = 32/height
  ZeroDivisionError: division by zero

• [x] Image is invalid. Imgwarp failing.

  
  OpenCV Error: Assertion failed (ssize.width > 0 && ssize.height > 0) in resize, file /io/opencv/modules/imgproc/src/imgwarp.cpp, line 3492
  Traceback (most recent call last):
  File "experiment.py", line 92, in <module>
  sd = stats(ocr, D, book_dir)
  File "experiment.py", line 15, in stats
  pagewise = webtotrain.read_book(book_dir)
  File "/OCRData2/ocr/retrain/src/aux/webtotrain.py", line 122, in read_book
  pagewise = images_and_truths(ud, word_mapping_f)
  File "/OCRData2/ocr/retrain/src/aux/webtotrain.py", line 96, in images_and_truths
  atom_images = extract_atoms(prefix+imgloc, atoms)
  File "/OCRData2/ocr/retrain/src/aux/webtotrain.py", line 65, in extract_atoms
  atomImages = list(map(extract_atom_image, atoms))
  File "/OCRData2/ocr/retrain/src/aux/webtotrain.py", line 62, in extract_atom_image
  interpolation = cv2.INTER_CUBIC)
  cv2.error: /io/opencv/modules/imgproc/src/imgwarp.cpp:3492: error: (-215) ssize.width > 0 && ssize.height > 0 in function resize

[jerinphilip]

65f22d4d69c2dc983039b68303bb50ad5a9830ec. Fixed.