bordercrop

A black borders cropping module

Crop the black borders from any image in a single line of code!

Getting Started

These instructions will get you a copy of the project up and running on your local machine for development and testing purposes. See deployment for notes on how to deploy the project on a live system.

Prerequisites

You will need Python 3 to use this module

# vermin output
Minimum required versions: 3.2
Incompatible versions:     2

According to Vermin (--backport typing), Python 3.2 is needed for the backport of typing but some may say that it is available for python versions higher than 3.0

Always check if your Python version works with bordercrop before using it in production

Installing

Option 1: From PyPI

pip install bordercrop

Option 2: From Git

pip install https://github.com/Animenosekai/bordercrop

You can check if you successfully installed it by printing out its version:

$ python -c "import bordercrop; print(bordercrop.__version__)"
# output:
bordercrop v1.0.0

or just:

$ bordercrop --version
# output:
bordercrop v1.0.0

Usage

You can use bordercrop in Python by importing it in your script:

import bordercrop

cropped_image = bordercrop.crop("https://i.imgur.com/lhQe6Bq.jpg")
cropped_image.show() # show the cropped image

Leaving everything with the default values, you may get images with no crop or with no size (entirely cropped).

I recommend testing and tweaking the MINIMUM_THRESHOLD_HITTING and MINIMUM_ROWS values according to your picture (a big picture needs more minimum rows and more pixels to hit before counting a row as dark).

CLI usage

You can use bordercrop in other apps by accessing it through the CLI version:

$ bordercrop --image "https://i.ytimg.com/vi/e_53PHZwQH4/hqdefault.jpg" --output "cropped.jpg"
output

As a Python module

The given image can be a filepath (str, bytes or Path), an URL (which will be downloaded) or a PIL.Image.Image instance

crop()

Autocrops the black borders from the given image

Args:
image: the given image, it can be a filepath (str, bytes or Path), an URL (which will be downloaded), a BytesIO or a PIL.Image.Image instance
THRESHOLD: the black threshold (0 is black while 225 is white)
MINIMUM_THRESHOLD_HITTING: the number of pixels in a row which needs to hit the threshold to count the row as dark (ex: if 5 is given and there is only 4 black pixels in the row, the row won't be counted as black)
MINIMUM_ROWS: the minimum row requirement to count a border (ex: if set to 3, 3 rows need to consecutively be black to count it as a border)

Returns:
A PIL.Image.Image instance containing the cropped image

borders()

Gives back the bounding box of the image without the black borders

Args:
image: the given image, it can be a filepath (str, bytes or Path), an URL (which will be downloaded), a BytesIO or a PIL.Image.Image instance
THRESHOLD: the black threshold (0 is black while 225 is white)
MINIMUM_THRESHOLD_HITTING: the number of pixels in a row which needs to hit the threshold to count the row as dark (ex: if 5 is given and there is only 4 black pixels in the row, the row won't be counted as black)
MINIMUM_ROWS: the minimum row requirement to count a border (ex: if set to 3, 3 rows need to consecutively be black to count it as a border)

Returns:
A tuple containing the coordinates (LEFT, TOP, RIGHT, BOTTOM)

get_image()

Gives back the given image as a PIL.Image.Image instance

Mostly used internally, it can be useful sometimes.

Args:
image: the given image, it can be a filepath (str, bytes or Path), an URL (which will be downloaded), a BytesIO or a PIL.Image.Image instance

Returns:
A PIL.Image.Image instance containing the given image

Exceptions

All of the excpetions inherit from the BordercropException

A WrongType exception can be raised if the wrong type of image is given

Deployment

This module is currently in development and might contain bugs.

Feel free to use it in production if you feel like it is suitable for your production even if you may encounter issues.

Built With

• Pillow - To manipulate images

Authors

• Anime no Sekai - Initial work - Animenosekai

License

This project is licensed under the MIT License - see the LICENSE file for more details