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lensfunpy 1.2.3

Python wrapper for the lensfun library

Package Documentation

lensfunpy is an easy-to-use Python wrapper for the lensfun library.

Sample code

How to find cameras and lenses:

import lensfunpy

cam_model = 'NIKON D3S'
lens_maker = 'Nikon'
lens_model = 'Nikkor 28mm f/2.8D AF'

db = lensfunpy.Database()
cam = db.find_cameras(cam_maker, cam_model)[0]
lens = db.find_lenses(cam, lens_maker, lens_model)[0]

print cam
# Camera(Maker: NIKON CORPORATION; Model: NIKON D3S; Variant: ;
#        Mount: Nikon F AF; Crop Factor: 1.0; Score: 0)

print lens
# Lens(Maker: Nikon; Model: Nikkor 28mm f/2.8D AF; Type: RECTILINEAR;
#      Focal: 28.0-28.0; Aperture: 2.79999995232-2.79999995232;
#      Crop factor: 1.0; Score: 110)

How to correct lens distortion:

import cv2 # OpenCV library

focal_length = 28.0
aperture = 1.4
distance = 10
image_path = '/path/to/image.tiff'
undistorted_image_path = '/path/to/image_undist.tiff'

im = cv2.imread(image_path)
height, width = im.shape[0], im.shape[1]

mod = lensfunpy.Modifier(lens, cam.crop_factor, width, height)
mod.initialize(focal_length, aperture, distance)

undist_coords = mod.apply_geometry_distortion()
im_undistorted = cv2.remap(im, undist_coords, None, cv2.INTER_LANCZOS4)
cv2.imwrite(undistorted_image_path, im_undistorted)

Installation on Linux

You need to have the lensfun library installed to use this wrapper.

On Ubuntu, you can get (an outdated) version with:

sudo apt-get install liblensfun0 liblensfun-dev

Or install the latest developer version from the SVN repository:

git clone git:// lensfun
cd lensfun
cmake .
sudo make install

After that, it’s the usual pip install lensfunpy.

If you get the error “ImportError: cannot open shared object file: No such file or directory” when trying to use lensfunpy, then do the following:

echo "/usr/local/lib" | sudo tee /etc/
sudo ldconfig

The lensfun library is installed in /usr/local/lib and apparently this folder is not searched for libraries by default in some Linux distributions.

Installation on Windows

Binaries are provided for Python 2.7, 3.3 and 3.4 for both 32 and 64 bit. These can be installed with a simple pip install --use-wheel lensfunpy (or just pip install lensfunpy if using pip >= 1.5).

Binaries for other Python versions are currently not produced but if there is a need then this is possible as well. In that case, just contact me.

File Type Py Version Uploaded on Size
lensfunpy-1.2.3-cp27-none-macosx_10_6_intel.macosx_10_9_intel.macosx_10_9_x86_64.macosx_10_10_intel.macosx_10_10_x86_64.whl (md5) Python Wheel cp27 2015-01-09 1MB
lensfunpy-1.2.3-cp27-none-win32.whl (md5) Python Wheel 2.7 2015-01-09 1MB
lensfunpy-1.2.3-cp27-none-win_amd64.whl (md5) Python Wheel 2.7 2015-01-09 1MB
lensfunpy-1.2.3-cp33-cp33m-macosx_10_6_intel.macosx_10_9_intel.macosx_10_9_x86_64.macosx_10_10_intel.macosx_10_10_x86_64.whl (md5) Python Wheel cp33 2015-01-09 1MB
lensfunpy-1.2.3-cp33-none-win32.whl (md5) Python Wheel 3.3 2015-01-09 1MB
lensfunpy-1.2.3-cp33-none-win_amd64.whl (md5) Python Wheel 3.3 2015-01-09 1MB
lensfunpy-1.2.3-cp34-cp34m-macosx_10_6_intel.macosx_10_9_intel.macosx_10_9_x86_64.macosx_10_10_intel.macosx_10_10_x86_64.whl (md5) Python Wheel cp34 2015-01-09 1MB
lensfunpy-1.2.3-cp34-none-win32.whl (md5) Python Wheel 3.4 2015-01-09 1MB
lensfunpy-1.2.3-cp34-none-win_amd64.whl (md5) Python Wheel 3.4 2015-01-09 1MB
lensfunpy-1.2.3.tar.gz (md5) Source 2015-01-09 92KB
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