Photogrammetry..again??

Hmmffss..I hope I will never meet this major after my bachelor graduation, but now this become one of my subject again. However I have to dig all of the material..one of the important is about orthophoto processing, hope it raises a little bit understanding about that. Link 1 :Making DEM and Orthophoto with Microimages Link 2 :Creating Orthorectified (Single) Aerial Photography