Fast orthomosaic without build Dense cloud?

[roby]

Hi
I am Rob, I have an urgent question regarding build fast orthomosaic, 
I need to build an fast orthomosaic  without build dense cloud, you know I mean to build a rough dem and an fast orthomosaic just using align photo,
Has anyone had same experience to share with me?? 
Thank you so much in advance for your kind attention

[rossnixon]

Is this from overlapping aerial photos? If the ground is relatively flat, use 'Image Composite Editor' a free image stitching program for Windows. www.microsoft.com/en-us/download/details.aspx?id=52459  You will then have to georeference the final image in a mapping program.

[Alexey Pasumansky]

Hello roby,

You can build mesh or DEM based on the sparse point cloud (the Align Photos procedure product) and then use this rough surface for orthomosaic generation.