Colorspacious is a powerful, accurate, and easy-to-use library for performing colorspace conversions.
In addition to the most common standard colorspaces (sRGB, XYZ, xyY, CIELab, CIELCh), we also include: color vision deficiency ("color blindness") simulations using the approach of Machado et al (2009); a complete implementation of CIECAM02; and the perceptually uniform CAM02-UCS / CAM02-LCD / CAM02-SCD spaces proposed by Luo et al (2006).
To get started, simply write:
from colorspacious import cspace_convert Jp, ap, bp = cspace_convert([64, 128, 255], "sRGB255", "CAM02-UCS")
This converts an sRGB value (represented as integers between 0-255) to
CAM02-UCS J'a'b' coordinates (assuming standard sRGB viewing
conditions by default). This requires passing through 4 intermediate
colorspaces; cspace_convert automatically finds the optimal route
and applies all conversions in sequence:
This function also of course accepts arbitrary NumPy arrays, so converting a whole image is just as easy as converting a single value.
- Documentation:
- http://colorspacious.readthedocs.org/
- Installation:
pip install colorspacious- Downloads:
- https://pypi.python.org/pypi/colorspacious/
- Code and bug tracker:
- https://github.com/njsmith/colorspacious
- Contact:
- Nathaniel J. Smith <njs@pobox.com>
- Dependencies:
- Python 2.6+, or 3.3+
- NumPy
- Developer dependencies (only needed for hacking on source):
- nose: needed to run tests
- License:
- MIT, see LICENSE.txt for details.
- References for algorithms we implement:
- Luo, M. R., Cui, G., & Li, C. (2006). Uniform colour spaces based on CIECAM02 colour appearance model. Color Research & Application, 31(4), 320–330. doi:10.1002/col.20227
- Machado, G. M., Oliveira, M. M., & Fernandes, L. A. (2009). A physiologically-based model for simulation of color vision deficiency. Visualization and Computer Graphics, IEEE Transactions on, 15(6), 1291–1298. http://www.inf.ufrgs.br/~oliveira/pubs_files/CVD_Simulation/CVD_Simulation.html
Other Python packages with similar functionality that you might want to check out as well or instead:
colour: http://colour-science.org/colormath: http://python-colormath.readthedocs.org/ciecam02: https://pypi.python.org/pypi/ciecam02/ColorPy: http://markkness.net/colorpy/ColorPy.html