Is there a way to display cv::Mat using __android_log_print()[SOLVED]

asked 2019-07-13 06:34:29 -0600

open_ranger
91 ●3 ●10

updated 2019-07-15 21:46:59 -0600

supra56

943 ●9 ●6

I know you can display a cv::Mat using cout << Mat << endl;

But I am examing this on a android phone it can't handle cout; So is there a established way to send it through __android_log_print()? which is pretty much the same as printf().

Or do I need to write my own customised version of std::String Mat_to_Sting(cv::Mat)?

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answered 2019-07-15 14:29:36 -0600

open_ranger
91 ●3 ●10

Here

Mat mat=(Mat_<uchar>(5,5)<<0,0,1,0,0,  0,2,2,2,0,  3,3,3,3,3,  0,4,4,4,0,  0,0,5,0,0);
ostringstream mat_data;
mat_data<<cv::format(mat, cv::Formatter::FMT_NUMPY);
__android_log_print(ANDROID_LOG_DEBUG, "JNI","Mat is: \n %s",mat_data.str().c_str());