Hi Ishrat, Welcome to Julia. About the original question of loading OpenCV via PyCall, there was a discussion that mentioned using it, successfully, in this thread:
https://github.com/timholy/Images.jl/issues/96#issuecomment-44529823 I also just tested it myself, and cv2 imported successfully on Ubuntu 14.04 with Julia 0.3.11 / Python 2.7.6. However, I am using the default version of opencv installed by `apt-get install python-opencv`, which appears to be 2.4 (rather than your 3.0 version). A couple suggestions for debugging this: - the first thing is to check is that PyCall is up-to-date, using `Pkg.update()`. (just in case, might have been fixed since the last update). - another idea to add some debugging output in the failing "pywrap" function. You could change line 312 ( https://github.com/stevengj/PyCall.jl/blob/804e065479362f0f3f8a413f8d9ddeb201fccfbc/src/PyCall.jl#L312) from: [symbol(x[1]) for x in filter(x -> x[1][1] != '_', members)] to [symbol(x[1]) for x in filter(x -> (println(x); x[1][1]) != '_', members)] And then start Julia try `@pyimport cv2` again. This should now print out all of the objects as they are filtered at that line, which might give a clue why the error is happening -- check the output just before the error occurs. Maybe there is some change in OpenCV 3 that is different from what PyCall expects there? Best, Isaiah On Fri, Sep 18, 2015 at 7:34 AM, Ishrat Badami <badami.ish...@gmail.com> wrote: > Hi everyone, > > For quite some time I am trying to use opencv with julia. > Initially I tried installing Cxx.jl + OpenCV.jl with julia 4.0 > following the instructions given here: https://github.com/Keno/Cxx.jl > > I encountered compiling errors while building Cxx package in julia . > https://github.com/Keno/Cxx.jl/issues/159 which still needs to be > resolved. > I also tried LLVM-3.7.0 + julia-0.4 but and I am encountering different > set of compilation errors related to clang library. > > Hence I gave up installing Cxx package. > > I then installed PyCall.jl package to try and see if I can use OpenCV > Python api in Julia. > > The python api works in python REPL using import cv2 command. > > But when I try > > *using PyCall + @pyimport cv2* I get following error: > > ERROR: BoundsError() > in anonymous at /home/badami/.julia/v0.3/PyCall/src/PyCall.jl:312 > in filter at array.jl:1230 > in pywrap at /home/badami/.julia/v0.3/PyCall/src/PyCall.jl:310 > in pywrap at /home/badami/.julia/v0.3/PyCall/src/PyCall.jl:298 > > My question is : Is it possible to pyimport opencv python api in julia at > all? > I am really looking forward for some help. Feeling desperate. > > My system specs: > OS: Ubuntu 14.04 > Python: 2.7.6 > OpenCV: 3.0.0 > julia-0.3 > > Thank you. > > >
