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Hi, I am a complete nubi in photogrammetry. Simply out of curiosity I thought I'd try to see what could be done with the photos from the Apollo 14 landing images. I was particularly interested to see if the various packages could extract distances as the dimensions of the LEM are known.
The astronauts used a Hasselblad 500 El. On the lunar surface the photos of the LEM and surrounding adjacent were taken with a Zeiss Biogon 60 mm lense whose focal length is given as being 61.1 mm. The Field of View is said to be 49.2 deg side, 66 deg. diag. The film negative of the images was on 53 mm X 53 mm negative. The only info I knew how to use was the focal length which I put into the image EXIF.
Here is where I found the images, https://www.hq.nasa.gov/alsj/a14/images14.html#Mag65
The LEM was photoed from two different sides. The first such sequesnce of images where the LEM is seen starts with - AS14-66-9252.jpg. The second, astronaut is much further away, starts with AS14-66-9274.jpg.
What I wanted to share here is my observation about 3DF Zephyr. IT IS VERY GOOD !!!!!
The photos available are very limited. But I nubi managed to get a fairly good 3-D model only with Zephyr. I tried this with Meshroom, Agisoft Metashape and Reality Capture with dismal results, basically no results. I realize that I was using the free incomplete versions without control/marker point usage. Additionally being a nubi without deep knowledge I was probably not getting optimal results. But using 3DF Zephyr straight out of the box with near auto guiding and little sophistication by the user, gave me results that simply are impressive. Zephyr was able to resolve the angular shape of the LEM from just a few photos taken by the astronaut JUST ROTATING his body, hence he was not moving around the craft. Whatever is the algorithm picking tie points/markers, well it must be super good.
If anyone has the energy to try out this project I would just love to see what a really good user could do with 3DF Zephyr and these limited number of images.
Again, Great Software !!!!
Ciau
The astronauts used a Hasselblad 500 El. On the lunar surface the photos of the LEM and surrounding adjacent were taken with a Zeiss Biogon 60 mm lense whose focal length is given as being 61.1 mm. The Field of View is said to be 49.2 deg side, 66 deg. diag. The film negative of the images was on 53 mm X 53 mm negative. The only info I knew how to use was the focal length which I put into the image EXIF.
Here is where I found the images, https://www.hq.nasa.gov/alsj/a14/images14.html#Mag65
The LEM was photoed from two different sides. The first such sequesnce of images where the LEM is seen starts with - AS14-66-9252.jpg. The second, astronaut is much further away, starts with AS14-66-9274.jpg.
What I wanted to share here is my observation about 3DF Zephyr. IT IS VERY GOOD !!!!!
The photos available are very limited. But I nubi managed to get a fairly good 3-D model only with Zephyr. I tried this with Meshroom, Agisoft Metashape and Reality Capture with dismal results, basically no results. I realize that I was using the free incomplete versions without control/marker point usage. Additionally being a nubi without deep knowledge I was probably not getting optimal results. But using 3DF Zephyr straight out of the box with near auto guiding and little sophistication by the user, gave me results that simply are impressive. Zephyr was able to resolve the angular shape of the LEM from just a few photos taken by the astronaut JUST ROTATING his body, hence he was not moving around the craft. Whatever is the algorithm picking tie points/markers, well it must be super good.
If anyone has the energy to try out this project I would just love to see what a really good user could do with 3DF Zephyr and these limited number of images.
Again, Great Software !!!!
Ciau
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