OpenCV functions errors in iOS

Question

I'm try to write application for iOS using openCV. When I'm using code from the examples (for example squares.c) and adopt it to my interface all is good. But when I'm try to add some functions for testing strange errors occurred. For example:

const cv::Point* p = &squares[j][0];
int n = (int)squares[j].size();
cv::Mat image = [my_image CVMat];
polylines(image, &p, &n, 1, true, cv::Scalar(0,255,0), 8, CV_AA);   //Working good  
cvFloodFill(&c, cvPoint(10, 10), CV_RGB(255, 0, 0)); // Not working

Error: OpenCV Error: Bad flag (parameter or structure field) (Unrecognized or unsupported array type) in cvGetMat, file /Users/Aziz/Documents/Projects/opencv_sources/trunk/modules/core/src/array.cpp, line 2482

What I'm doing wrong?

Sam · Accepted Answer · 2012-07-21 13:50:43Z

3

You are mixing the C++ with the C interface.

The part that's working in written in C++. For it, all the headers are included. But the functions that start with cv, like cvFloodFill, come from the C interface or from the legacy module, and you probably did not include them.

My advice is too keep your code in C++. So, write

cv::floodFill( c, cv::Point(10,10), cv::Scalar(255,0,0) );

And make sure that the variable name c is a C++ thing

answered Jul 21, 2012 at 13:50

Sam

20.1k4 gold badges64 silver badges85 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Medlay Over a year ago

After this changes I have — OpenCV Error: Unsupported format or combination of formats () in cvFloodFill. Variable c is cv::Mat c = [image CVMat];

Sam Over a year ago

That is much better! You fixed the compile problem, now you can get on to understand OpenCV. Enter docs.opencv.org, search for floodFill, read the docs, check the floodFill example that comes with OpenCV and you'll learn how to use it.

Collectives™ on Stack Overflow

OpenCV functions errors in iOS

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related