Thank you all very much for the kind words
I would like to add that much of the credit must really go to those true wizards at NASA/JPL for not only making and bringing to orbit these almost unearthly powerful camers like LROC and HiRISE ... but also for sharing the whole image catalog via the internet with everyone in the world !
It is this unprecedented quality together with the unprecedented availability of the raw data that opens the door for everyone to explore new ideas and processing techniques (such as I do with my "planetary landscape photography" projects)
Actually this has been my very first attempt with lunar imagery after my previous work has almost been exclusively devoted to Mars (and yet barely scratching the surface of HiRISE's Terapixel-Universe)
And until recently I was not even aware of just how amazing and extensive an image catalog already exists from the LRO mission
A challenging problem has been the sheer size of the data sets yielding to DEMs with hundreds of millions or even billions of polygons.
So I had to re-write major parts of my software as a true 64 bit application in order to run the core algorithm (that has a peak memory consumption of many times the size of the input data) on such large data sets.
For example, the peak main memory usage during creation of the DEM used for the last one of the images in the gallery has been about 11 Gigabytes.
QUOTE
Has this been done for some of the later Apollo landing sites? (so we can compare images from LRO and from the actual surface).
Yes that's what I'm going to try next ... however the results probably won't be perfectly comparable because of the different lighting conditions (sun elevation and azimuth) of the LRO images compared with those from the ground. For the moon DEMs its also difficult to simulate other than the original sun azimut angle because of the large cast shadows that I can, of course, only reconstruct as smooth featureless shadow volumes in absence of any image information in the totally black (atmosphere-less) shadow areas.
P.S.:
in the original post I forgot to mention the LRO observation ID of the LROC raw images associated with each renedering (they should have been within the image filename but my web gallery script just renamed them as image-000 ... image-001 )
So here they are:
Gallery-Image# : LRO image ID
----------------------
#1 M102230053
#2 M103668324
#3 M103668324
#4 M109305653
#5 M109305653
#6 M109305653
#7 nacl00000e09
#8 nacl00000e09
#9 nacl00000e09
#10 M102230053