Strange error with my thesis project

edit

whoa, dramatic intro ..

"(Unrecognized or unsupported array type)"

no idea if it helps, but in almost all cases, i've seen this error, it was due to an empty matrix. so check, where you load images(wrong path), get pics from the cam(no capture), where Mats are returned ,etc.

starting a debugger, and see, where it cries out, whould be the most obvious approach, btw..

ok I downloaded gdb as debugger in ubuntu, do you know any good manual explaining how to use it. P.S. thanks to correct my english

first of all, 400 lines is not such much, so, if gdb is on another star for you, first try to sprinkle your code liberally with print statements like : cerr << m.rows << " " m.cols << " " << m.type() << " " m.channels() before applying that.

actually, it's some 7 years, since i last touched gdb, but wht i remember is:

compile with -g flag (enable debugging)

run:

gdb -q my_prog [args for my prog] --directory=folders_where_src_is:more_src_folders

man gdb // should give some more info

Ok i put my initial code (without inserting include, struct, namespace, etc...

  int main(int argc, char** argv){

        Mat img = imread("andaina.bmp");
        printf("r =%d , c= %d,t=%d, ch=%d",img.rows,img.cols,img.type(),img.channels());

I run and i have: r =0 , c= 0,t=0, ch=1 OpenCV Error: Bad flag (parameter or structure field) (Unrecognized or unsupported array type) in cvGetMat, file /build/buildd/opencv-2.3.1/modules/core/src/array.cpp, line 2482 terminate called after throwing an instance of 'cv::Exception' what(): /build/buildd/opencv-2.3.1/modules/core/src/array.cpp:2482: error: (-206)
Unrecognized or unsupported array type in function cvGetMat

ah, so it could not read/find your image, and returned an empty one.

Mat img = imread("/home/lala/andaina.bmp"); // try an absolute path fo a change
if ( img.empty() ) { printf("empty img\n"); return -1}

Hi you had the reason. It doesn t read the image. Now it works. I printed all elements. I have just a doubt: r=486, c=648, type=16,channels=3,type=16,depth=0 Rows,cols and channels is ok. I m doubt about depth (doesn t have to return something different?) and type

Hey there,I guess the depth must be in the enumerated form from OpenCV. As you say it returns zero, it means its a CV_8U image (i.e Each channel in image is 8 bit. Thus it must be 8bit 3channel image in your case) Somebody please correct me if i am wrong.

Prasanna, no you're right . thanks for jumping in ;)

where can I see all the enumerated form of openCV? tthanks to help me guys!

opencv\modules\core\include\opencv2\core\core_c.h or

opencv\modules\core\include\opencv2\core\core.hpp