So far, we have presented image mixing techniques performed by overlaying one image on top of the other(s). Now, it is time to discuss what happens when we want to make a panoramic image; that is, combine partially overlapping images to make a larger one. This technique is often called panorama stitching and it has gained much attention during the last decade. Nowadays, some modern cameras come with internal stitching algorithms.
To create such an image in the simplest possible way, we need to do two things, namely, detect (either manually or automatically) some corresponding points in adjacent images and use them to transform the images, so that their geometry is correct. Blending the images, so that the connection areas are smoother, might also be needed.
For the purpose of our beginner level tutorial, we will show a manual way to perform panorama stitching. In our example, we will not make any transformation to the resulting images, so that...