colorgram.py

by obskyr

A Python module for extracting colors from images. Get a palette of any picture!

246 Stars 26 Forks Last release: almost 2 years ago (v1.2.0) MIT License 25 Commits 3 Releases

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colorgram.py

colorgram.py is a Python library that lets you extract colors from images. Compared to other libraries, the colorgram algorithm's results are more intense.

colorgram.py is a port of

colorgram.js 
, a JavaScript library written by GitHub user
@darosh 
. The goal is to have 100% accuracy to the results of the original library (a goal that is met). I decided to port it since I much prefer the results the colorgram algorithm gets over those of alternative libraries - have a look in the next section.

Results

.. image:: http://i.imgur.com/BeReaRM.png :alt: Results of colorgram.py on a 512x512 image

Time-wise, an extraction of a 512x512 image takes about 0.66s (another popular color extraction library,

Color Thief 
__, takes about 1.05s).

Installation

You can install colorgram.py with

pip 
__, as following:

::

pip install colorgram.py

How to use

Using colorgram.py is simple. Mainly there's only one function you'll need to use -

colorgram.extract
.

Example '''''''

.. code:: python

import colorgram

Extract 6 colors from an image.

colors = colorgram.extract('sweet_pic.jpg', 6)

colorgram.extract returns Color objects, which let you access

RGB, HSL, and what proportion of the image was that color.

first_color = colors[0] rgb = first_color.rgb # e.g. (255, 151, 210) hsl = first_color.hsl # e.g. (230, 255, 203) proportion = first_color.proportion # e.g. 0.34

RGB and HSL are named tuples, so values can be accessed as properties.

These all work just as well:

red = rgb[0] red = rgb.r saturation = hsl[1] saturation = hsl.s

colorgram.extract(image, number_of_colors)
'''''''''''''''''''''''''''''''''''''''''''''' Extract colors from an image.
image
may be either a path to a file, a file-like object, or a Pillow
Image
object. The function will return a list of
number_of_colors
Color
objects.

colorgram.Color
''''''''''''''''''' A color extracted from an image. Its properties are:
  • Color.rgb
    - The color represented as a
    namedtuple
    of RGB from 0 to 255, e.g.
    (r=255, g=151, b=210)
    .
  • Color.hsl
    - The color represented as a
    namedtuple
    of HSL from 0 to 255, e.g.
    (h=230, s=255, l=203)
    .
  • Color.proportion
    - The proportion of the image that is in the extracted color from 0 to 1, e.g.
    0.34
    .

Sorting by HSL '''''''''''''' Something the original library lets you do is sort the colors you get by HSL. In actuality, though, the colors are only sorted by hue (as of colorgram.js 0.1.5), while saturation and lightness are ignored. To get the corresponding result in colorgram.py, simply do:

.. code:: python

colors.sort(key=lambda c: c.hsl.h)
# or...
sorted(colors, key=lambda c: c.hsl.h)

Contact

If you find a bug in the colorgram.py, or if there's a feature you would like to be added, please

open an issue 
__ on GitHub.

If you have a question about the library, or if you'd just like to talk about, well, anything, that's no problem at all. You can reach me in any of these ways:

  • Tweet
    @obskyr 
    __
  • E-mail me 
    __

To get a quick answer, Twitter is your best bet.

Enjoy!

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