This could have happened in multiple other places:

• Contributing Warning drop down
• Usage -> Creating your font -> After point 3

Realized after ec476e4 that we should explicitly pin dependencies, we were depending on setup.py which isn't good.

Initial input:

The above input didn't work, tried with increased exposure:

The font was generated fine using handwrite-web (handwrite 0.2.1), but it had 2 issues:

1. #68
2. Handwrite heading part for font after D, E
   

cc @programmer290399
Found while testing: #67

Hello, I was making font file and got following error

Command I used

handwrite Handwrite.jpg ./

Error I got

Traceback (most recent call last):
File "/home/ganesh314159/.local/bin/handwrite", line 8, in <module>
sys.exit(main())
File "/home/ganesh314159/.local/lib/python3.9/site-packages/handwrite/cli.py", line 56, in main
converters(
File "/home/ganesh314159/.local/lib/python3.9/site-packages/handwrite/cli.py", line 34, in converters
run(sheet, output_directory, directory, config, metadata)
File "/home/ganesh314159/.local/lib/python3.9/site-packages/handwrite/cli.py", line 12, in run
SHEETtoPNG().convert(sheet, characters_dir, config)
File "/home/ganesh314159/.local/lib/python3.9/site-packages/handwrite/sheettopng.py", line 44, in convert
characters = self.detect_characters(
File "/home/ganesh314159/.local/lib/python3.9/site-packages/handwrite/sheettopng.py", line 116, in detect_characters
x, y, w, h = cv2.boundingRect(contours[i])
IndexError: list index out of range

This is my Handwrite jpg

• em
• descent
• ascent
• filename
• style
• thresholding
• default bearing
• flag, rows, cols for autokerning

Way for generating font without numbers/symbols (this can still be done but will generate font with blanks if any box is left blank)

We won't probably test on windows for first release

Related: #62

PS C:\Users\Gayashan\Desktop\hand> handwrite .\sample.jpg .\asd.ttf Traceback (most recent call last): File "C:\Users\Gayashan\miniconda3\lib\runpy.py", line 197, in _run_module_as_main return _run_code(code, main_globals, None, File "C:\Users\Gayashan\miniconda3\lib\runpy.py", line 87, in _run_code exec(code, run_globals) File "C:\Users\Gayashan\miniconda3\Scripts\handwrite.exe\__main__.py", line 7, in <module> File "C:\Users\Gayashan\miniconda3\lib\site-packages\handwrite\cli.py", line 56, in main converters( File "C:\Users\Gayashan\miniconda3\lib\site-packages\handwrite\cli.py", line 34, in converters run(sheet, output_directory, directory, config, metadata) File "C:\Users\Gayashan\miniconda3\lib\site-packages\handwrite\cli.py", line 14, in run SVGtoTTF().convert(characters_dir, output_directory, config, metadata) File "C:\Users\Gayashan\miniconda3\lib\site-packages\handwrite\svgtottf.py", line 28, in convert subprocess.run( File "C:\Users\Gayashan\miniconda3\lib\subprocess.py", line 505, in run with Popen(*popenargs, **kwargs) as process: File "C:\Users\Gayashan\miniconda3\lib\subprocess.py", line 951, in __init__ self._execute_child(args, executable, preexec_fn, close_fds, File "C:\Users\Gayashan\miniconda3\lib\subprocess.py", line 1420, in _execute_child hp, ht, pid, tid = _winapi.CreateProcess(executable, args, FileNotFoundError: [WinError 2] The system cannot find the file specified

(Running at Windows x64)
I followed the installation guide from the documentation and confirmed each install. But somehow, when I run
handwrite ./handwrite.jpg ./
in the terminal I get this error:
Traceback (most recent call last): File "c:\users\acer\anaconda3\envs\resnet\lib\runpy.py", line 193, in _run_module_as_main "__main__", mod_spec) File "c:\users\acer\anaconda3\envs\resnet\lib\runpy.py", line 85, in _run_code exec(code, run_globals) File "C:\Users\acer\Anaconda3\envs\Resnet\Scripts\handwrite.exe\__main__.py", line 7, in <module> File "c:\users\acer\anaconda3\envs\resnet\lib\site-packages\handwrite\cli.py", line 28, in main SVGtoTTF().convert(directory, args.output, args.config) File "c:\users\acer\anaconda3\envs\resnet\lib\site-packages\handwrite\svgtottf.py", line 23, in convert outfile, File "c:\users\acer\anaconda3\envs\resnet\lib\subprocess.py", line 423, in run with Popen(*popenargs, **kwargs) as process: File "c:\users\acer\anaconda3\envs\resnet\lib\subprocess.py", line 729, in __init__ restore_signals, start_new_session) File "c:\users\acer\anaconda3\envs\resnet\lib\subprocess.py", line 1017, in _execute_child startupinfo) FileNotFoundError: [WinError 2] The system cannot find the file specified

Probably will be done after #7

We dont have kerning and bearing for any of the special characters.

We also need to remove the redundant config inputs and clean up svgtotff.py

Currently it does it on the default branch which is now dev, we need to explicitly checkout main branch for releases.

Options:

1. Building potrace (PEP 517/518)
2. Download potrace executables (http://potrace.sourceforge.net/#downloading) on the first run and saving them to the package path for future use.
3. Just mention in the docs.

• Instructions to setup on Windows.
• Instructions to setup on Linux.
• Credits for svgtottf, potrace, fontforge, sachac-hand.
• Basic description.

Related: #3

We should do this thresholding in sheettopng during the cropping process.

cod-ed.github.io/handwrite/ should be for master and cod-ed.github.io/handwrite/dev for dev.

Hi,

Thanks for this wonderful tool.
I am trying to use it on Windows Home 10.
I have installed fontforge in usual program files (x86) folder by download the installer.
Potrace is downloaded as zip and added the path to it in PATH env var.
Then from cmd I am running handwrite --directory "temp" "inputscan.jpg" "outputfont/"
In temp dir it creates all the folders per char.png (folder 59 is empty)
Then program throws error in sheettopng.py > cv2.inwrite() as below:

File "C:\Users\tushar\AppData\Local\Programs\Python\Python39\lib\runpy.py", line 197, in _run_module_as_main return _run_code(code, main_globals, None, File "C:\Users\tushar\AppData\Local\Programs\Python\Python39\lib\runpy.py", line 87, in _run_code exec(code, run_globals) File "C:\Users\tushar\AppData\Local\Programs\Python\Python39\Scripts\handwrite.exe\__main__.py", line 7, in <module> File "C:\Users\tushar\AppData\Local\Programs\Python\Python39\lib\site-packages\handwrite\cli.py", line 56, in main converters( File "C:\Users\tushar\AppData\Local\Programs\Python\Python39\lib\site-packages\handwrite\cli.py", line 34, in converters run(sheet, output_directory, directory, config, metadata) File "C:\Users\tushar\AppData\Local\Programs\Python\Python39\lib\site-packages\handwrite\cli.py", line 12, in run SHEETtoPNG().convert(sheet, characters_dir, config) File "C:\Users\tushar\AppData\Local\Programs\Python\Python39\lib\site-packages\handwrite\sheettopng.py", line 47, in convert self.save_images( File "C:\Users\tushar\AppData\Local\Programs\Python\Python39\lib\site-packages\handwrite\sheettopng.py", line 158, in save_images cv2.imwrite( cv2.error: OpenCV(4.6.0) D:\a\opencv-python\opencv-python\opencv\modules\imgcodecs\src\loadsave.cpp:801: error: (-215:Assertion failed) !_img.empty() in function 'cv::imwrite'

I am new to python, please let me know if I am missing anything.

Thanks,
Tushar

Implement helpful error messages/options to understand how and why things went wrong.

• CI
• Gitter
• PyPI
• Licence
• CodeQuality

We are just testing an excellent input, we should test various inputs with changed config and document them for end user debugging. Related #3.
Better if done after #4.

We can move useful sheets to assets repo.

• Traceback:

❯ handwrite Downloads/sa\ handwrite\ font_1\ \(1\).jpg .
Traceback (most recent call last):
  File "/home/saahil/anaconda3/envs/handwrite/bin/handwrite", line 8, in <module>
    sys.exit(main())
  File "/home/saahil/anaconda3/envs/handwrite/lib/python3.7/site-packages/handwrite/cli.py", line 57, in main
    args.input_path, args.output_directory, args.directory, args.config, metadata
  File "/home/saahil/anaconda3/envs/handwrite/lib/python3.7/site-packages/handwrite/cli.py", line 34, in converters
    run(sheet, output_directory, directory, config, metadata)
  File "/home/saahil/anaconda3/envs/handwrite/lib/python3.7/site-packages/handwrite/cli.py", line 12, in run
    SHEETtoPNG().convert(sheet, characters_dir, config)
  File "/home/saahil/anaconda3/envs/handwrite/lib/python3.7/site-packages/handwrite/sheettopng.py", line 49, in convert
    characters_dir,
  File "/home/saahil/anaconda3/envs/handwrite/lib/python3.7/site-packages/handwrite/sheettopng.py", line 160, in save_images
    images[0],
cv2.error: OpenCV(4.5.4) /tmp/pip-req-build-3129w7z7/opencv/modules/imgcodecs/src/loadsave.cpp:799: error: (-215:Assertion failed) !_img.empty() in function 'imwrite'

• Dependencies:

❯ fontforge -v
Copyright (c) 2000-2021. See AUTHORS for Contributors.
 License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
 with many parts BSD <http://fontforge.org/license.html>. Please read LICENSE.
 Version: 20201107
 Based on sources from 2021-11-27 12:18 UTC-ML-D-GDK3.
 Based on source from git with hash: 58238cc173c80379d0d4616971fc793da26c6aa4
fontforge 20201107
build date: 2021-11-27 12:18 UTC

❯ potrace -v
potrace 1.16. Copyright (C) 2001-2019 Peter Selinger.
Library version: potracelib 1.16
Default unit: inches
Default page size: letter

❯ conda list
# packages in environment at /home/saahil/anaconda3/envs/handwrite:
#
# Name                    Version                   Build  Channel
_libgcc_mutex             0.1                        main  
_openmp_mutex             4.5                       1_gnu  
ca-certificates           2021.10.26           h06a4308_2  
certifi                   2021.10.8        py37h06a4308_0  
handwrite                 0.3.0                    pypi_0    pypi
ld_impl_linux-64          2.35.1               h7274673_9  
libffi                    3.3                  he6710b0_2  
libgcc-ng                 9.3.0               h5101ec6_17  
libgomp                   9.3.0               h5101ec6_17  
libstdcxx-ng              9.3.0               hd4cf53a_17  
ncurses                   6.3                  h7f8727e_2  
numpy                     1.21.4                   pypi_0    pypi
opencv-python             4.5.4.60                 pypi_0    pypi
openssl                   1.1.1l               h7f8727e_0  
pillow                    8.4.0                    pypi_0    pypi
pip                       21.2.2           py37h06a4308_0  
python                    3.7.11               h12debd9_0  
readline                  8.1                  h27cfd23_0  
setuptools                58.0.4           py37h06a4308_0  
sqlite                    3.36.0               hc218d9a_0  
tk                        8.6.11               h1ccaba5_0  
wheel                     0.37.0             pyhd3eb1b0_1  
xz                        5.2.5                h7b6447c_0  
zlib                      1.2.11               h7b6447c_3  

• Images used:

Fitted to A4 size using Adobe Scan

Original image scanned using Adobe Scan

• Operating system used:

❯ neofetch 
██████████████████  ████████   saahil@saahil-gl638rd 
██████████████████  ████████   --------------------- 
██████████████████  ████████   OS: Manjaro Linux x86_64 
██████████████████  ████████   Host: GL63 8RD REV:1.0 
████████            ████████   Kernel: 5.10.79-1-MANJARO 
████████  ████████  ████████   Uptime: 4 hours, 59 mins 
████████  ████████  ████████   Packages: 1564 (pacman) 
████████  ████████  ████████   Shell: bash 5.1.8 
████████  ████████  ████████   Resolution: 1920x1080 
████████  ████████  ████████   WM: i3 
████████  ████████  ████████   Theme: Matcha-dark-sea [GTK2], Numix [G 
████████  ████████  ████████   Icons: Papirus-Dark [GTK2/3] 
████████  ████████  ████████   Terminal: kitty 
████████  ████████  ████████   CPU: Intel i7-8750H (12) @ 4.100GHz 
                               GPU: NVIDIA GeForce GTX 1050 Ti Mobile 
                               GPU: Intel CoffeeLake-H GT2 [UHD Graphi 
                               Memory: 3189MiB / 15850MiB

• Tried both conda and python venv environments, but it failed in both with the same error shared above.
• Python version 3.7

Initial input:

The above input didn't work, tried with increased exposure:

The font was generated fine using handwrite-web (handwrite 0.2.1), but it had 2 issues:

1. The grey lines appearing (this also messes up the kerning)
2. #69

cc @programmer290399
Found while testing: #67

If the packaging isn't done till 0.2.0, we need to update users to install fontforge from the AppImage rather than the PPA.

PPA would work for Ubuntu >= 19.04 but since official support is gone, we should drop it too.

We need a final sheet structure and need finalized scaling parameter for each input.

We had given up on trimming the PNG file after converting to BMP, we need explore this more if this would be helpful now.

• cleanup
• docs and comments in svgtottf