Incorporates functions for image preprocessing, filtering and image recognition. The package takes advantage of 'RcppArmadillo' to speed up computationally intensive functions. The histogram of oriented gradients descriptor is a modification of the 'findHOGFeatures' function of the 'SimpleCV' computer vision platform and the average_hash(), dhash() and phash() functions are based on the 'ImageHash' python library.
The OpenImageR package is an image processing library. It includes functions for image preprocessing, filtering and image recognition. More details on the functionality of OpenImageR can be found in the blog-post and in the package Vignette.
To install the package from CRAN use,
install.packages("OpenImageR")
and to download the latest version from Github use the install_github function of the devtools package,
devtools::install_github('mlampros/OpenImageR')
Use the following link to report bugs,
I did OpenMP optional for all cpp files due to the fact that the OSX OS does not currently support openMP ( r-devel-osx-x86_64-clang )
I removed the floor() function from the lines 45, 46 of the hog_features.cpp, because otherwise Solaris OS throws the following error:
I can not fix the following error in the hog_features.cpp file for the r-oldrel-windows platform as it has either to do with the RcppArmadillo version or is GCC specific,
Platforms, which support newer versions of GCC (GCC >= 4.9.0) and a recent version of RcppArmadillo (>= 0.7) do not throw such an error.
I modified the Makevars files, so that OpenImageR can be installed error-free in the following OS's,