c++ - OpenCv, get image information -


i playing around open source opencv application. provided image sets, works great, when attempt pass live camera stream, or recorded frames camera stream, crashes. assume cv::mat type, differing image channels, or conversion not doing.

the provided dataset grey-scale, 8 bit, , images. application expects grayscale (cv_8u).

my question is:

given 1 of (working) provided images, , 1 of recorded (not working) images, best way compare them using opencv, find out difference might causing crashes?

thank you.

i have tried:

commenting out code (which gave assertion errors)

  if(mimgray.channels()==3)     {              cvtcolor(mimgray,mimgray,cv_bgr2gray);             cvtcolor(imgrayright,imgrayright,cv_bgr2gray);      }     else if(mimgray.channels()==4)     {              cvtcolor(mimgray,mimgray,cv_bgra2gray);             cvtcolor(imgrayright,imgrayright,cv_bgra2gray);      }

and replacing with:

    cv::mat templ;     mimgray.convertto(templ, cv_8u);     cvtcolor(templ, mimgray, cv_bayergr2bgr);     cvtcolor(mimgray, mimgray, cv_bgr2gray);

and program crashes no error...

you can try code:

if ( mimgray.depth() != cv_8u )     mimgray.convertto(mimgray, cv_8u);  if (mimgray.channels() == 3 ) {    cvtcolor(mimgray, mimgray, color_bgr2gray); }

or can define new mat create function , use that.


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