Gaussian blurring with OpenCV: only blurring a subregion of an image?

Question

Is it possible to only blur a subregion of an image, instead of the whole image with OpenCV, to save some computational cost?

EDIT: One important po

Answer 1

Yes it is possible to blur a Region Of Interest in OpenCV.

size( 120, 160 ); 
OpenCV opencv = new OpenCV(this);
opencv.loadImage("myPicture.jpg");
opencv.ROI( 60, 0, 60, 160 );
opencv.blur( OpenCV.BLUR, 13 );   
image( opencv.image(), 0, 0 );

For more information, check out this link. Good luck,