Perspective recovery of text using transformed ellipses

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Computer Vision unproject_text
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Comments
  • cv2.findContours fix

    cv2.findContours fix

    in the 135 line changed this

    _, contours, hierarchy = cv2.findContours(work, cv2.RETR_CCOMP, cv2.CHAIN_APPROX_NONE)

    to this

    contours, hierarchy = cv2.findContours(work, cv2.RETR_CCOMP, cv2.CHAIN_APPROX_NONE)

    it's because in a previous version of opencv that function used to return 3 values, now it returns just 2 values

    opened by sumanmichael 0
  • Value Error: not enough values to unpack

    Value Error: not enough values to unpack

    Python 3 / OSX

    $ python3 unproject_text/unproject_text.py samples/hd/IMG_1234.jpg Traceback (most recent call last): File "unproject_text/unproject_text.py", line 503, in main() File "unproject_text/unproject_text.py", line 490, in main contours, hierarchy = get_contours(img) File "unproject_text/unproject_text.py", line 135, in get_contours cv2.CHAIN_APPROX_NONE) ValueError: not enough values to unpack (expected 3, got 2)

    opened by maxhallhatesm3 1

  • "ValueError: Not a bracketing interval." on some images

    Tried to run the program on some images, for some it worked, but on many I get this error:

    python3 unproject_text.py lp8.png

    abs_area_cutoff = 18.7572 got 6 contours with 1 small. got bounding rect -281 163 583 58 got bounding rect -305 186 586 12 got bounding rect 263 197 3 1 Traceback (most recent call last): File "unproject_text.py", line 503, in main() File "unproject_text.py", line 495, in main SRH = skew_detect(img, contours, RH) File "unproject_text.py", line 468, in skew_detect res = scipy.optimize.minimize_scalar(f, (-2.0, 0.0, 2.0)) File "/usr/local/lib/python3.6/site-packages/scipy/optimize/_minimize.py", line 653, in minimize_scalar return _minimize_scalar_brent(fun, bracket, args, **options) File "/usr/local/lib/python3.6/site-packages/scipy/optimize/optimize.py", line 2108, in _minimize_scalar_brent brent.optimize() File "/usr/local/lib/python3.6/site-packages/scipy/optimize/optimize.py", line 1892, in optimize xa, xb, xc, fa, fb, fc, funcalls = self.get_bracket_info() File "/usr/local/lib/python3.6/site-packages/scipy/optimize/optimize.py", line 1880, in get_bracket_info raise ValueError("Not a bracketing interval.") ValueError: Not a bracketing interval.

    The image I tried was: https://liorazi.github.io/lp8.png

    opened by liorazi 5
  • Error with the usage command

    Error with the usage command

    m-c02sh1f0g8wl:unproject_text-master arg000m$ python unproject_text.py deskew0.jpg Traceback (most recent call last): File "unproject_text.py", line 503, in main() File "unproject_text.py", line 490, in main contours, hierarchy = get_contours(img) File "unproject_text.py", line 135, in get_contours cv2.CHAIN_APPROX_NONE) ValueError: need more than 2 values to unpack

    could you help me with this ?

    opened by anuragreddygv323 3
Owner
Matt Zucker
Matt Zucker
GitHub https://mzucker.github.io/2016/10/11/unprojecting-text-with-ellipses.html
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