Error using mex MxArray.cpp error C2440

Hello,

Im trying to load OpenCV into Matlab and I get this msg:

Error using mex

MxArray.cpp

C:\dev\mexopencv\include\MxArray.hpp(386): error C2440 :cannot convert from 'viod *' to 'int *'

Void cannot be converted to other types - (translation from Polish)

I've been using this webside as a guide:

https://github.com/kyamagu/mexopencv/wiki/Installation-%28Windows%2C-MATLAB%2C-OpenCV-3%29

I used the OpenCV-master, OpenCV_contrib-master, mexopencv-master files as my source data. Despite not everything being to shown to deselect in Cmake (Configure OpenCV step 4 in the link), I was able to finish Visual Studio Build without any misteakes. Mex is set for VisualStudio2017.

The whole thing goes like this:

>> cd('C:\dev\mexopencv')

>> mexopencv.make('opencv_path','C:\dev\build\install', 'opencv_contrib',true)

mex -O -largeArrayDims -I'C:\dev\mexopencv\include' -I'C:\dev\mexopencv\opencv_contrib\include' -I'C:\dev\build\install\include' -L'C:\dev\build\install\x64\vc15\lib' -lopencv_aruco401 -lopencv_bgsegm401 -lopencv_bioinspired401 -lopencv_calib3d401 -lopencv_ccalib401 -lopencv_core401 -lopencv_datasets401 -lopencv_dnn401 -lopencv_dnn_objdetect401 -lopencv_dpm401 -lopencv_face401 -lopencv_features2d401 -lopencv_flann401 -lopencv_fuzzy401 -lopencv_gapi401 -lopencv_hfs401 -lopencv_highgui401 -lopencv_img_hash401 -lopencv_imgcodecs401 -lopencv_imgproc401 -lopencv_line_descriptor401 -lopencv_ml401 -lopencv_objdetect401 -lopencv_optflow401 -lopencv_phase_unwrapping401 -lopencv_photo401 -lopencv_plot401 -lopencv_quality401 -lopencv_reg401 -lopencv_rgbd401 -lopencv_saliency401 -lopencv_shape401 -lopencv_stereo401 -lopencv_stitching401 -lopencv_structured_light401 -lopencv_superres401 -lopencv_surface_matching401 -lopencv_text401 -lopencv_tracking401 -lopencv_video401 -lopencv_videoio401 -lopencv_videostab401 -lopencv_xfeatures2d401 -lopencv_ximgproc401 -lopencv_xobjdetect401 -lopencv_xphoto401 -c 'C:\dev\mexopencv\src\MxArray.cpp' -outdir 'C:\dev\mexopencv\lib'

Building with 'Microsoft Visual C++ 2017'.

Error using mex

MxArray.cpp

C:\dev\mexopencv\include\MxArray.hpp(386): error C2440: "domyśny argument": nie można konwertować z "void" na "int"

C:\dev\mexopencv\include\MxArray.hpp(386): note: Wyrażenia typu void nie mogą być konwertowane na inne typy

C:\dev\mexopencv\include\MxArray.hpp(413): error C2440: "domyśny argument": nie można konwertować z "void" na "int"

C:\dev\mexopencv\include\MxArray.hpp(413): note: Wyrażenia typu void nie mogą być konwertowane na inne typy

C:\dev\mexopencv\include\MxArray.hpp(421): error C2440: "domyśny argument": nie można konwertować z "void" na "int"

C:\dev\mexopencv\include\MxArray.hpp(421): note: Wyrażenia typu void nie mogą być konwertowane na inne typy

C:\dev\mexopencv\src\MxArray.cpp(96): error C3861: "cvErrorStr": identyfikatora nie odnaleziono

C:\dev\mexopencv\src\MxArray.cpp(229): warning C4267: "argument": konwersja z "size_t" do "int", możliwa utrata danych

C:\dev\mexopencv\src\MxArray.cpp(232): warning C4267: "argument": konwersja z "size_t" do "int", możliwa utrata danych

C:\dev\mexopencv\src\MxArray.cpp(248): warning C4267: "inicjowanie": konwersja z "size_t" do "int", możliwa utrata danych

C:\dev\mexopencv\src\MxArray.cpp(545): warning C4267: "argument": konwersja z "size_t" do "int", możliwa utrata danych

C:\dev\mexopencv\src\MxArray.cpp(554): error C2120: Słowo kluczowe "void" jest niedozwolone ze wszystkimi typami

C:\dev\mexopencv\src\MxArray.cpp(556): warning C4267: "argument": konwersja z "size_t" do "int", możliwa utrata danych

C:\dev\mexopencv\src\MxArray.cpp(567): warning C4267: "argument": konwersja z "size_t" do "int", możliwa utrata danych

C:\dev\mexopencv\src\MxArray.cpp(608): error C2065: "CV_MAX_DIM": niezadeklarowany identyfikator

C:\dev\mexopencv\src\MxArray.cpp(615): warning C4267: "inicjowanie": konwersja z "size_t" do "int", możliwa utrata danych

C:\dev\mexopencv\src\MxArray.cpp(632): error C2120: Sˆowo kluczowe "void" jest niedozwolone ze wszystkimi typami

C:\dev\mexopencv\src\MxArray.cpp(633): warning C4267: "argument": konwersja z "size_t" do "int", możliwa utrata danych

C:\dev\mexopencv\src\MxArray.cpp(639): warning C4267: "argument": konwersja z "size_t" do "int", możliwa utrata danych

C:\dev\mexopencv\src\MxArray.cpp(659): error C2120: Słowo kluczowe "void" jest niedozwolone ze wszystkimi typami

C:\dev\mexopencv\src\MxArray.cpp(680): warning C4267: "argument": konwersja z "size_t" do "int", możliwa utrata danych

C:\dev\mexopencv\src\MxArray.cpp(683): warning C4267: "argument": konwersja z "size_t" do "int", możliwa utrata danych

C:\dev\mexopencv\src\MxArray.cpp(686): warning C4267: "argument": konwersja z "size_t" do "int", możliwa utrata danych

C:\dev\mexopencv\src\MxArray.cpp(689): warning C4267: "argument": konwersja z "size_t" do "int", możliwa utrata danych

C:\dev\mexopencv\src\MxArray.cpp(692): warning C4267: "argument": konwersja z "size_t" do "int", możliwa utrata danych

C:\dev\mexopencv\src\MxArray.cpp(695): warning C4267: "argument": konwersja z "size_t" do "int", możliwa utrata danych

C:\dev\mexopencv\src\MxArray.cpp(698): warning C4267: "argument": konwersja z "size_t" do "int", możliwa utrata danych

C:\dev\mexopencv\src\MxArray.cpp(808): warning C4267: "argument": konwersja z "size_t" do "int", możliwa utrata danych

Error in mexopencv.make (line 97)

if ~opts.dryrun, eval(cmd); end

Answer 1

[Lukas Strobel]

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