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General / Best Handheld Camera for Facade photogrammetry
« on: October 14, 2022, 08:30:21 AM »
Howdy Folks.
I have been using Agisoft for a fair few years now, predominantly doing aerial surveys with a Phantom 4 with relatively good results using GCP obtained from GPS/Total station measurements (I'm a land surveyor). I've also had some good results using the Phantom 4 camera as a handheld camera (sort of) by walking along a building facade holding the drone to model building walls accurately. However, whenever i try using any phone or non-DSLR digital camera in the same fashion i can never get the same clear results like i do with the Phantom 4 camera.
I know that there is now technology like the "ViDoc" which attaches to your phone and gives you RTK accurate photos from a phone to help with camera positioning, but in using this you're still using a tiny phone sensor compared to a better focal length DSLR. There is also possibility to buy a DSLR to do facade location for our surveys but i'm not a photographer and wouldn't know where to start looking into this, i know DSLRs can get very expensive.
So my question is, does anyone have any advice on the best hand held camera for facade modelling of buildings that is reasonably priced and will give good clear photogrammetric models that i'm after. Are there any phones that are better than others for this? Will any ol' DSLR get the job done properly as long as we can get GCP on the building walls? Literally any advice would be a big help!
(I've tried a brief search online and within the forum and couldn't really find any definitive..)
(Also, it's possible that i'm just getting camera/alignment settings wrong when trying to use hand held devices, and am happy for any feedback on that topic. I know that DroneDeploy/Pix4D set the drone camera settings well when capturing, and it always helps with photo stitching when facade photos can marry up with aerial and oblique photos of half roof/half wall photos which is where i've had success using a drone for this so it's very different to just using a hand held camera)
I have been using Agisoft for a fair few years now, predominantly doing aerial surveys with a Phantom 4 with relatively good results using GCP obtained from GPS/Total station measurements (I'm a land surveyor). I've also had some good results using the Phantom 4 camera as a handheld camera (sort of) by walking along a building facade holding the drone to model building walls accurately. However, whenever i try using any phone or non-DSLR digital camera in the same fashion i can never get the same clear results like i do with the Phantom 4 camera.
I know that there is now technology like the "ViDoc" which attaches to your phone and gives you RTK accurate photos from a phone to help with camera positioning, but in using this you're still using a tiny phone sensor compared to a better focal length DSLR. There is also possibility to buy a DSLR to do facade location for our surveys but i'm not a photographer and wouldn't know where to start looking into this, i know DSLRs can get very expensive.
So my question is, does anyone have any advice on the best hand held camera for facade modelling of buildings that is reasonably priced and will give good clear photogrammetric models that i'm after. Are there any phones that are better than others for this? Will any ol' DSLR get the job done properly as long as we can get GCP on the building walls? Literally any advice would be a big help!
(I've tried a brief search online and within the forum and couldn't really find any definitive..)
(Also, it's possible that i'm just getting camera/alignment settings wrong when trying to use hand held devices, and am happy for any feedback on that topic. I know that DroneDeploy/Pix4D set the drone camera settings well when capturing, and it always helps with photo stitching when facade photos can marry up with aerial and oblique photos of half roof/half wall photos which is where i've had success using a drone for this so it's very different to just using a hand held camera)
