autocrop 1.1.0

Automatically crops faces from batches of pictures

autocrop

Perfect for profile picture processing for your website or batch work for ID cards, autocrop will output images centered around the biggest face detected.

Installation

Simple!

pip install autocrop

Use

Autocrop can be used from the command line or directly from Python API.

From the command line

usage: [-h] [-o OUTPUT] [-i INPUT] [-w WIDTH] [-H HEIGHT] [-v]

Automatically crops faces from batches of pictures

optional arguments:
  -h, --help
  		Show this help message and exit
  -o, --output, -p, --path
		Folder where cropped images will be placed.
		Default: current working directory
  -r, --reject
		Folder where images without detected faces will be placed.
		Default: same as output directory
  -i, --input
		Folder where images to crop are located.
		Default: current working directory
  -w, --width
		Width of cropped files in px. Default=500
  -H, --height
		Height of cropped files in px. Default=500
  --facePercent
  		Zoom factor. Percentage of face height to image height.
  -v, --version
  		Show program's version number and exit

Examples

• Crop every image in the pics folder, resize them to 400 px squares, and output them in the crop directory:
  • autocrop -i pics -o crop -w 400 -H 400.
  • Images where a face can't be detected will be left in crop.
• Same as above, but output the images with undetected faces to the reject folder:
  • autocrop -i pics -o crop -r reject -w 400 -H 400.

If no output folder is added, asks for confirmation and destructively crops images in-place.

From Python

Import the Cropper class, set some parameters (optional), and start cropping.

The crop method accepts filepaths or np.ndarray, and returns Numpy arrays. These are easily handled with PIL or Matplotlib.

from PIL import Image
from autocrop import Cropper

cropper = Cropper()

# Get a Numpy array of the cropped image
cropped_array = cropper.crop('portrait.png')

# Save the cropped image with PIL
cropped_image = Image.fromarray(cropped_array)
cropped_image.save('cropped.png')

Further examples and use cases are found in the accompanying Jupyter Notebook.

Supported file types

The following file types are supported:

• EPS files (.eps)
• GIF files (.gif) (only the first frame of an animated GIF is used)
• JPEG 2000 files (.j2k, .j2p, .jp2, .jpx)
• JPEG files (.jpeg, .jpg, .jpe)
• LabEye IM files (.im)
• macOS ICNS files (.icns)
• Microsoft Paint bitmap files (.msp)
• PCX files (.pcx)
• Portable Network Graphics (.png)
• Portable Pixmap files (.pbm, .pgm, .ppm)
• SGI files (.sgi)
• SPIDER files (.spi)
• TGA files (.tga)
• TIFF files (.tif, .tiff)
• WebP (.webp)
• Windows bitmap files (.bmp, .dib)
• Windows ICO files (.ico)
• X bitmap files (.xbm)

Gotchas

Autocrop uses OpenCV to perform face detection, which is installed through binary wheels. If you already have OpenCV 3+ installed, you may wish to uninstall the additional OpenCV installation: pip uninstall opencv-python.

Installing directly

In some cases, you may wish the package directly, instead of through PyPI:

cd ~
git clone https://github.com/leblancfg/autocrop
cd autocrop
pip install .

conda

Development of a conda-forge package for the Anaconda Python distribution is also currently slated for development. Please leave feedback on issue #7 if you are insterested in helping out.

Requirements

Best practice for your projects is of course to use virtual environments. At the very least, you will need to have pip installed.

Autocrop is currently being tested on:

• Python 3.5+
• OS:
  • Linux
  • macOS
  • Windows

More Info

Check out:

• http://docs.opencv.org/master/d7/d8b/tutorial_py_face_detection.html#gsc.tab=0
• http://docs.opencv.org/master/d5/daf/tutorial_py_histogram_equalization.html#gsc.tab=0

Adapted from:

• http://photo.stackexchange.com/questions/60411/how-can-i-batch-crop-based-on-face-location

Contributing

Although autocrop is essentially a CLI wrapper around a single OpenCV function, it is actively developed. It has active users throughout the world.

If you would like to contribute, please consult the contribution docs.