Do i need to set/change something when working with small Focal Lengths-mobile?

[JohnyJoe]

Do i need to set/change something when working with small Focal Lengths (mobile phone etc.)

Hello

When using pictures taken with small focal lenghts (below 18mm), like the ones used in mobile phones (5mm and so on) or even cheap compact "point and shoot" cameras (like Ixus 132), do i need to change some setting in agisoft metashape to get good results...? I read somewhere (here on forums) that you should "switch" somewhere (some settings in metashape) to "fisheye lenses used" or something like that). To get good results... But im not sure (if its true, and if it applies even to newer metashapes versions (and isnt only a thing of the past)).

Cause when i use pictures taken by mobile phones (cheap ones) or even the cheap compact point and shoot cameras (ixus 132 for example), i get (on high, ultra high dense point cloud settings) rather "noisy" point clouds (dont know how to call it), im not sure if its because of motion blur (me not holding the camera steady enough), or if its because i use "wrong settings" in metashape when working with these small focal length files, or if its something else...?

[Bzuco]

Hi JohnyJoe, small camera sensors don't have good image quality in terms of noise. Noise reduction used on mobile phones does not help to make cleaner and more detailed point cloud.
If you want to have better quality with these devices, you need to get much closer to objects when taking photos and build just medium quality dense cloud. This procedure will "eliminate" noise problem and image sharpness degraded thanks to denoising.

[JohnyJoe]

Hi JohnyJoe, small camera sensors don't have good image quality in terms of noise. Noise reduction used on mobile phones does not help to make cleaner and more detailed point cloud.
If you want to have better quality with these devices, you need to get much closer to objects when taking photos and build just medium quality dense cloud. This procedure will "eliminate" noise problem and image sharpness degraded thanks to denoising.

Thanks
 
i did get close with the mobile phone.

But neverthless so you are saying that i do NOT have to make any adjustment or change any settings in metashape when using these photos...? (instead of normal raw files from 24 mpx DSLRs...?
No need to change any setting...?

So what was that in the past where i read somewhere that you need to change "something" in metashape (photoscan back then)  to "fisheye"...? you did have to do it in the past versions, but not in the new ones?

Thank you

[Bzuco]

Small lens focal length number used on small camera devices is much higher after multiplyng it with crop factor...my phone's wide camera is using 5.6mm lenses but after correcting it with crop factor it is 26mm in full frame equivalent. So for metashape it does not matter if phone or DSLR was used.

Only if you will be taking photos on your phone with ultra wide(e.g. 112° field of view ~14mm in full frame equivalent) or fisheye lenses, then you need to change camera type to fisheye in camera calibration dialog.