How to do it...

Here, we add two images. This is useful when you want to create some special effects or to overlay information over an image:

1. Call the cv::add function or, more precisely here, the cv::addWeighted function, since we want a weighted sum as follows:

   cv::addWeighted(image1,0.7,image2,0.9,0.,result); 

The operation results in a new image, as seen in the following screenshot:

Let's see how the preceding instructions work when we execute them.