error in gason mask rcnn

Dear Sir,

I got error when run the code of mask rcnn.

the error like below

but all the step I was follow correctly.

Unrecognized function or variable 'gasonMex'.

Error in gason (line 53)
out = gasonMex( 'convert', in );

Error in CocoApi (line 61)
coco.data=gason(fileread(annFile)); end

Error in unpackAnnotations (line 7)
coco = CocoApi(annotationFile);

[Walter Roberson]

You appear to be using https://github.com/cocodataset/cocoapi

The distribution there provides .mex* files for MacOS Intel, and for Linux. For Windows you would probably have to mex gasonMex.cpp and possibly maskApiMex.c as well. (I do not know if the package supports Windows; I do not see any remark indicating it does not support it.)

[mohd akmal masud]

the instruction like this:

To install: -For Matlab, add coco/MatlabApi to the Matlab path (OSX/Linux binaries provided) -For Python, run "make" under coco/PythonAPI -For Lua, run “luarocks make LuaAPI/rocks/coco-scm-1.rockspec” under coco/

but i quite dont understand

[Walter Roberson]

If you are using MacOS or Linux, use pathtool to add the coco/MatlabApi folder to your MATLAB path.

If you are using Windows, you will need to compile the files. To do that you could try changing your current directory to coco/MatlabApi, and then giving the commands

mex gasonMex.cpp
mex maskApiMex.c

If both of those work, then add the coco/MatlabApi folder to your MATLAB path using pathtool.

[mohd akmal masud]

Ok sir, I will try today. Then let you know

[mohd akmal masud]

I tried. But got error

>> mex gasonMex.cpp

Building with 'Microsoft Visual C++ 2019'.

Error using mex
Creating library gasonMex.lib and object gasonMex.exp
gasonMex.obj : error LNK2019: unresolved external symbol "char const * __cdecl jsonStrError(int)" (?jsonStrError@@YAPEBDH@Z)
referenced in function mexFunction
gasonMex.obj : error LNK2019: unresolved external symbol "public: void __cdecl JsonAllocator::deallocate(void)"
(?deallocate@JsonAllocator@@QEAAXXZ) referenced in function "public: __cdecl JsonAllocator::~JsonAllocator(void)"
(??1JsonAllocator@@QEAA@XZ)
gasonMex.obj : error LNK2019: unresolved external symbol "int __cdecl jsonParse(char *,char * *,union JsonValue *,class
JsonAllocator &)" (?jsonParse@@YAHPEADPEAPEADPEATJsonValue@@AEAVJsonAllocator@@@Z) referenced in function mexFunction
gasonMex.mexw64 : fatal error LNK1120: 3 unresolved externals

[Walter Roberson]

https://github.com/ZheC/Realtime_Multi-Person_Pose_Estimation/issues/110 has some assistance on that.

[mohd akmal masud]

YAH..I WAS TRY THE METHOD BUT STILL ERROR

Answer 1

[Shivam Malviya]

Hi,

It appears that you are currently working on instance segmentation using Mask R-CNN and using the COCO API for MATLAB to access the annotation data; however, you are running into an error that "gasonMex" is unrecognized.

This error causing is because the gason parser is not being compiled. To compile it, follow the instruction below:

• Clone the COCO API GitHub repository as using the following command:

git clone https://github.com/cocodataset/cocoapi

• In MATLAB, change your current directory to "cocoapi/MatlabAPI".
• Ensure that your system has a version of GCC that supports C++11 (version 4.7 or later).
• To compile the gason parser, execute the following MATLAB command:

mex('CXXFLAGS=$CXXFLAGS -std=c++11 -Wall','-largeArrayDims','private/gasonMex.cpp','../common/gason.cpp', '-I../common/','-outdir','private');

Refer to the following links for a better understanding;

• https://in.mathworks.com/help/deeplearning/ug/instance-segmentation-using-mask-rcnn.html
• https://github.com/cocodataset/cocoapi

Regards,

Shivam