Align photos

[denzjos]

If one want to erase unwanted information on a photo using several takes (camera handhold), then it is not necessary to transform the whole photo with the Ottia Tuota '4 to 4 points' plugin. Just make a selection of the part on one of the photos where is no unwanted information and set this selection in a new layer ('Edit / Copy' then 'Edit / Paste / Paste as / New Layer'). Move this new layer a little so you can see the things you want to erase on both layers. Then make 4 points path on the same image positions of both layers. Use the Uttia Tuota '4 to 4 point' plugin to transform the selection layer and see how the selection layer is transformed and placed on the right place you want to erase something. In the example photo people were constantly passing by and I took several pictures. 
The selection layer on the first layer 
   
After activating the plugin