Hi Matt, I'm wondering if you could share the code snippet for generating the animation? Thanks for your attention. I’m looking forward to your reply.

Hello, I have ran the code as mention in comments using python page_dewarp.py Img. Following error occurred after running the code.

python page_dewarp.py IMG_20190717_114448.jpg loaded IMG_20190717_114448.jpg with size 2250x4000 and resized to 375x667 Traceback (most recent call last): File "page_dewarp.py", line 915, in main() File "page_dewarp.py", line 867, in main cinfo_list = get_contours(name, small, pagemask, 'text') File "page_dewarp.py", line 450, in get_contours cv2.CHAIN_APPROX_NONE) ValueError: need more than 2 values to unpack

I'm trying to run the script but it gives me an "invalid syntax" error at line 739 print ' initial objective is', objective(params).

I'm using Python 3.5 (I installed WinPython with scipy, numpy and pillow) and OpenCV 3.2, which I installed following the instructions found here: https://pythonarena.wordpress.com/2016/03/07/scientific-python-on-windows/

Hello,

README and AUR package for this one.

Awesome software! I hope my application to CMU RI gets accepted. I am impressed by these programs.

Thanks for sharing!

At https://github.com/mzucker/page_dewarp/blob/master/page_dewarp.py#L16 you see import Image.

Pillow doesn't expose a top level Image class in sys.modules -- it is only available under the PIL module.

Changing the line to from PIL import Image from import Image should be backwards compatible with both PIL and Pillow.

Very nice project. However, I just can't make it work because of missing cv2 requirement (and possibly others):

Traceback (most recent call last):
  File "../page_dewarp.py", line 15, in <module>
    import cv2
ImportError: No module named cv2

Perhaps you could add a requirements.txt file to your repo?

Thanks for great work @mzucker , I try to dewarp line in page, I think algorithm work well, but output of dewarp not in the same location. I wish to dewarp the same position output. How to config it. Thanks in advance left is keypoint detection and optimization, right is output dewarp(but location change)

I have attached the script makes page_dewarp.py compatible with python 3 for anyone looking for this, like I was.

page_dewarp.txt

Just save as .py and it should work!

Thank you for building this software but I cannot figure out how to install it. 99% of the time software comes with pip install instructions, for that 1% of the time when the software does not I have a very difficult time getting it to work.

This PR includes changes from other forks.

Changes introduced by tachylatus fork:

• Rework requirements.txt
• Fix indentation error
• Support both 2-tuple and 3-tuple output from cv2.findContours

Tested and working in Python 3.10.0.

Setup:

python -m venv venv310
pip install -r requirements.txt
python page_dewarp.py ./example_input/boston_cooking_a.jpg

First all print statements need to be converted from print "" to print()

floating point errors here: 561 wrap values in int() due to floating point error 795 int(width...) 796 int(height....)

general errors which need handling

some text is white washed away

Traceback (most recent call last): File "page_dewarp.py", line 915, in main() File "page_dewarp.py", line 868, in main cinfo_list = get_contours(name, small, pagemask, 'text') File "page_dewarp.py", line 470, in get_contours contours_out.append(ContourInfo(contour, rect, tight_mask)) File "page_dewarp.py", line 376, in init self.center, self.tangent = blob_mean_and_tangent(contour) File "page_dewarp.py", line 352, in blob_mean_and_tangent mean_x = moments['m10'] / area ZeroDivisionError: float division by zero

apparently area can be 0 so we need to protect against this

If area==0: area=1

Resizing the image resulted in problems for me, so I nulled it out with img=src

Hi Matt, I found your blog post very interesting and this script very useful. Thanks! Since I left Python 2.x behind years ago, I check if this can be easily made to work with Python 3.x, and yes it can.

So here are my changes that made your scripts work with Python 3.9.1 and current versions of the relevant modules:

• cv2==4.5.1
• matplotlib==3.3.3
• numpy==1.19.4
• PIL=8.0.1
• scipy==1.5.4
• sympy==1.7.1

I'd be happy to see this PR incorporated into your version.

-- Christian

I tried to run this, but python 2 is deprecated, cv2 is not in pip anymore, there is opencv-python, but when I installed that and other dependences, I get errors...

╰─➤  page_dewarp.py example_input/boston_cooking_a.jpg
loaded boston_cooking_a.jpg with size 2448x3264 and resized to 490x653
Traceback (most recent call last):
  File "page_dewarp.py", line 1001, in <module>
    main()
  File "page_dewarp.py", line 954, in main
    cinfo_list = get_contours(name, small, pagemask, "text")
  File "page_dewarp.py", line 489, in get_contours
    mask, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_NONE
ValueError: need more than 2 values to unpack