This repository contains an Python wrapper of RANSAC for homography and fundamental matrix estimation from sparse correspondences. It implements LO-RANSAC and DEGENSAC.
It was originally located in https://github.com/ducha-aiki/pyransac, but was renamed to avoid conflict with already existing pyransac in pypi from other author.
Vanilla pydegensac implementation is marginally better than OpenCV one and with degeneracy-check enabled (DEGENSAC) it is the state of the art, according to the recent study Yin et.al."Image Matching across Wide Baselines: From Paper to Practice", 2020.
To build and install pydegensac
, you can use pip:
pip install pydegensac
Or clone or download this repository and then, from within the repository, run:
python3 ./setup.py install
or
pip3 install .
- Compiling pydegensac without a system-wide install.
python3 ./setup.py build
- Compiling on Mac OS X computer Use GCC instead of Clang. The most recent version on my machine (installed via brew) is gcc-8. Try this:
CC=gcc-8 python3 ./setup.py build
- Compiling on Ubuntu 18.04 You need LAPACK and a few other libraries and I always forget those specific package names. Take a look at my pydegensac Dockerfile to see the exact packages you need to apt install on an Ubuntu 18.04 system (https://github.com/quantombone/pydegensac-dockerfile/blob/master/Dockerfile)
FROM ubuntu:18.04
RUN apt-get clean
RUN apt-get update
RUN apt-get install -qy \
git python3 python3-setuptools python3-dev
RUN apt-get install -y cmake libblas-dev liblapack-dev gfortran
RUN apt-get install -y g++ gcc
RUN git clone https://github.com/ducha-aiki/pydegensac.git
WORKDIR pydegensac
RUN python3 ./setup.py build
CMD cp -R /pydegensac/build/lib.linux-x86_64-3.6/pydegensac /target_directory
https://github.com/quantombone/pydegensac-dockerfile
import pydegensac
H, mask = pydegensac.findHomography(src_pts, dst_pts, 3.0)
F, mask = pydegensac.findFundamentalMatrix(src_pts, dst_pts, 3.0)
See also this notebook with simple example
And this notebook with detailed explanation of possible options
- Python 3
- CMake 2.8.12 or higher
- LAPACK,
- BLAS (OpenBLAS, MKL, Atlas, ...)
- A modern compiler with C++11 support
Please cite us if you use this code:
@InProceedings{Chum2003,
author="Chum, Ond{\v{r}}ej and Matas, Ji{\v{r}}{\'i} and Kittler, Josef",
title="Locally Optimized RANSAC",
booktitle="Pattern Recognition",
year="2003",
}
@inproceedings{Chum2005,
author = {Chum, Ondrej and Werner, Tomas and Matas, Jiri},
title = {Two-View Geometry Estimation Unaffected by a Dominant Plane},
booktitle = {CVPR},
year = {2005},
}
@article{Mishkin2015MODS,
title = "MODS: Fast and robust method for two-view matching ",
journal = "Computer Vision and Image Understanding ",
year = "2015",
issn = "1077-3142",
doi = "http://dx.doi.org/10.1016/j.cviu.2015.08.005",
url = "http://www.sciencedirect.com/science/article/pii/S1077314215001800",
author = "Dmytro Mishkin and Jiri Matas and Michal Perdoch"
}
This wrapper part is based on great Benjamin Jack python_cpp_example
.