I have a directory of images that were captured by drone. The images have GPS info in the EXIF tags but are not georefferenced and do not have world files. I would like to merge these photos into a single mosaic file that I can then georefference in a GIS.
Are there any open-source application that will create the mosaic or am I stuck purchasing an expensive application like Agisoft Photoscan?
I want to create the mosaic automatically and not piece it together one image at a time with something like Photoshop.