CODEWITHSUNDEEP
opencv3.0androidopencv
Tanmoy Ghosh
Tanmoy Ghosh

Reputation: 82

Convert a bitmap to mat and vice versa in OpenCV

I have an Android Bitmap in my code and I would like to run the cvCanny method on it. However, it needs to be in a Mat first. How do I convert the data to Mat, and how do I convert it back to Bitmap when I'm done?

Upvotes: 4

Views: 2731

Answers (1)

Nabin Bhandari
Nabin Bhandari

Reputation: 16429

First import org.opencv.android.Utils

Then use:

Mat src = new Mat();
Utils.bitmapToMat(bitmap, src);

To perform edge detection:

Mat dest = new Mat();
Imgproc.Canny(src, dest, min, max);
Bitmap edgeBitmap = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.ARGB_8888);
Utils.matToBitmap(dest, edgeBitmap);
//edgeBitmap is ready

Upvotes: 4

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