Draw contours in color - Githubissues

cesine / AndroidOpenCVforHackathons

A hackathon ready project with selfdocumenting OpenCV debugging so you can get programming with OpenCV as soon as possible

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Draw contours in color #7

Open cesine opened 12 years ago

cesine commented 12 years ago

Step 1: You can get some contours by applying a threshold on the image (see code in jni/image_processing.cpp)

vector<vector > contours; findContours(thresh, contours, CV_RETR_EXTERNAL, CV_CHAIN_APPROX_NONE);//###

Step 2: Draw your contours

/*

Draw the checkbox-like contours which were found in green Scalar(0, 255, 0, 255) so you can see what the function is doing... */ drawContours(mbgra, contours, -1, Scalar(0, 255, 0, 255), 2);

For more details on what the parameters are for the drawContours function, see the friendly OpenCV docs: http://opencv.itseez.com/modules/imgproc/doc/structural_analysis_and_shape_descriptors.html?highlight=drawcontours#cv.DrawContours