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Topics - JohnyJoe

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1
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...?

2
Hello

Years ago (like around 2015 i guess (?))  I somewhat built my own custom "face scanner" consisting of 11 Cannon "Point and shoot cameras" - compact cheap cameras... I used 2 types - Canon A2500 and Cannon Ixus 132. (5x and 6x = 11 in total). I used it to scan my face. The results were ok i guess, mixing 2 different camera types (although both with the same Mpx - 16 Mpx) (Canon Ixus 132 and Canon A2500) didnt seem to bother Agisoft Photoscan.

Im currently thinking about expanding the number of cameras (probably by 5 at most, but maybe more). My question is- can i use even other different versions of Canon compact cameras? Or do i need to stick only to the 2 types i already have (Ixus 132, A2500)...? Like can i combine even more types than 2? Im eyeing buying used Canon IXUS 160 (which has 20 Mpx sensors NOT 16 as the old cameras i have)... My question is: Can i combine multiple different Cannon Ixus (and Canon A) point and shoot cameras? Even with different MPx (16 vs 20, maybe even with 14...?). Will it bother agisoft program? Will it give me subpar results (in comparison if i used ONLY the exact same type of camera (all Ixus 132 for example)...?

1) Do i have to worry or is it ok to combine different canon compact cameras?

2) Is there a limit to how many types can i combine...? Currently i have 2 types, can i combine even 5 different types for example?

3) Does the MPx difference matter? (16 Mpx VS 20 Mpx (and maybe ill buy even some 14 Mpx)) wont it bother the program...?

Thank you

3
HANDHELD photogrammetry, high ISO, AI denoise... Doable/Advisable...?

Hello, is doing photogrammetry with Handheld Mirrorless DSLR (Cannon EOS M200), handheld, high ISO (800 lets say) and using newest AI denoise in Lightroom Classic possible...? Like will it look good? NO tripod involved (thus the need for high ISO setting in order to get at least 1/100s+ shutter speeds to hopefully NOT get blurry images) ...?
I have currently Nikon D3200 which i use at home "studio" with tripod for photogrammetry for various objects/props i bring home. I was few times (like 2x times over the span of like 7 years (!)) in the terrain/outside with the camera and tripod... Only like 2x times over 7 years (!!). I always tell myself i will go exclusively a on photoscanning "journey"/trip to the city (i live in village) with the camera and tripod to scan objects i cannot bring home, but over the 7 years (!) i just never went, never "had the time" etc...

SO... i was thinking of getting a 2nd camera (Cannon EOS M200), PURELY for the purpose of "photogrammetry on the go" - to have a camera with me whenever i leave home for the city/outside. Its a smaller camera, so i can have it always with me and if i see something worth scanning (or just shooting for texture purposes) i will pull out the camera and "handheld" scan it... No more telling myself - "Oh... this is nice... ill come later back here with my Nikon and tripod and scan it"... Guess what - i NEVER DID, and thus "lost" the model/scan opportunity... (Few times I tried using a cheap smartphone i always have on me , but the scans are just not good...)

My question is: Is it worth it...? Like will the resulting scans be any good and more or less comparable with my nikon D3200 tripod scans...? Cause with the Cannon EOS M200 i will have to shoot without tripod (and even monopod), just handheld... Can you get a good looking scan handheld with such mirrorless camera...? Depending on the lighting, i will have to probably take majority of shoots with ISO 800, F8-F11, in order to prevent blurry images due to handholding the camera... I should be able to get at least shutter speeds of 1/100 sec and higher (1/125 etc.)... This should be enough to prevent blury images right...? I will denoise the high (800) ISO in lightroom classic using the newest AI denoise feature...

So could it be done, will the final scan be "any good" and comparable/ more or less the same quality as if done with a tripod at home...?

(will use agisoft metashape probably for the photogrammetry)

EDIT:

OR... can i shoot in full sun now these days? It was adviced that you should do scanning in shadow or when the sky is cloudy to get even lighting on your model... This is what i have always done, the downside is that there is LESS light entering the camera in these conditions, so you have to use tripod or high ISO settings... OR... did the "delighting" technology got so good over the years (i started 3d scanning like in 2015 or 2017 (?)), that you can now scan in full sun and auto remove the shadows later on with specialized tech ( i know agisoft metashape has some delighiting tools (2 seperate i think), Unity has some delighting tools, and there are probably others)... Did the delighting got so good over the years, that you can now shoot in full sun?

4
General / RAW file format - does it yet support it or still no?
« on: April 20, 2023, 04:52:22 PM »
Does Agisoft Metashape finally support RAW file formats (either from Cannon, NEFFs from Nikon or some other RAW file formats)...?

Or is it still a NO (it does NOT support them)...?

Will it ever support them? Why not? Seems good to support it, you can skip the exporting from Lightroom to TIFF "inter-step" if you dont need to export TIFFs and just use (maybe a bit altered) RAWs...?

5
Hello

Just a quick question, Agisoft offers Delighting in Metashape and in standalone Agisoft Delighter, how does it offer with other Delighting methods that are there...? Mainly i know (and talking about) Delighting in Unity engine and delighting using the Substance Alchemist aplication... ARe they more or less the same or is one significantly better/worse?

Thanks

6

Hello
I would like to know whats the difference between the standalone (free) aplication "Agisoft Delighter" and the "in-built" tool/feature named "Remove Lighting" in Agisoft Metashape...?
Both "tools" seem quite different (in agisoft delighter you have to directly pain in the model), in agisoft metashape "Remove Lighting" feature you dont have to paint on the model (or to be precise- you CANNOT even if you wanted)).

So... What are the differences? Why have two "different tools", why not include delighter "painting" directly in agisoft metashape please?

Thank you

7
In Agisoft metashape (photoscan), is there a way how to clean a mess of (not just) floating points? After generating dense point cloud you get a lot of "mess points" (pictures below) - some are floating, some are "connected" to the main shape... These are "garbage points", is there some "automated" solution/feature of how to get rid of them...? Sure i do it by hand but it costs a lot of time... Any feature/worfklow/function in agisoft how to get rid of them quickly/automaticaly...? (at least partially)...?
If agisoft doesnt have such feature (in which version?) is there some other software that can clean this easily?

https://postimg.cc/d7Y3G8kf

https://i.postimg.cc/TPybM0RT/garbagepoints.jpg

Thanks

8
Hello
I have camera Nikon D3200 with default kit lens (18-55mm), i useto scan smaller objects (like around 20x20 cm for example) (nothing TINY (insect) nothing HUGE).
I shoot around 50-150 photos per scan lets say. I use studio lights (cheap) and a cheap tripod.

I have NEVER done any camera calibration... I dont know anything about it

My question is simple - how much does camera calibration help in regards to increasing the final quality of the scan? (the dense point cloud, the resulting mesh, the texture)...?

THank you

9
Hello, i have been using some old version of agisoft metashape, now im using some newer but still older version (than the current one is). Its 1.5.5.

With this "newer but still old version" i got new error messages pop up here there, these didnt pop up EVER in previous versions.



They say:

Warning! The following problems can lead to suboptimal results:

- Images with variable zoom are added to the project. It is strongly recommended to avoid zooming as much as possible.

Happens when i upload images with "zoom" (or different Focal lenght in other words).

I have ALWAYS done this and never had this warning pop up before... DOes using different Focal Lenght ("zoom") really negativelly affect the final quality of the scan...? I have never noticed that...? IS that true? Or is that true only with never versions of metashape and older could handle it and newer give worse results? Or is it in all photogrammetry software that using different focal length leads to bad results...? I would swear i did some tests with this back in 2015 (or whatever) when i started with 3D scanning and never saw bad results...?

Is it worse? How much worse is it...? Zoom is sometimes necessary i feel... Should i really avoid it like the plague?



And another one:

Warning! The following problems can lead to suboptimal results:

- Images with different orientation are added to the project. It is strongly recommended to disable auto rotation in the camera or photo processing software.


Again...? Does different rotation matter? (in this example i scanned some leaf and few photos had the same leaf, the same side of the leaf, just aprx. 90 degree rotated...

I have dont this before i think and no problem. No it gives me this warning and also the point cloud looks weird... (like wrong, "normals" flipped).



So how is?

    Is using different Focal length really THAT BAD? Should i avoid it at all cost...? (any pictures of tests for this...?)

    Is using different rotation (mainly switching holding the camera verticaly or horizonatally; but even rotations like 30% only for example)... Is this also BAD...? How MUCH bad... should be avoided at ALL COSTS...?


(camera i use: Nikon D3100)

10
General / Performance diff. GTX 1060 vs GTX 1070 in photoscan...?
« on: February 28, 2017, 06:42:20 PM »
Does anybody have an idea or actual numbers, whats the speed improvement in photoscan when using GTX 1060 6 GB vs GTX 1070 8 GB?

Thank you

11
General / What software for cleaning Dense Point Cloud?
« on: October 20, 2016, 04:11:47 PM »
When one generates dense point cloud and there are a lot of points that need to be deleted (the whole point cloud "cleaned"). some points are out of the actual scanned object but some are near or even connected with the point clouds of the actual scaned object.
One can "clean it" in agisoft, but i believe that there are far more capable software for cleaning that the capable with agisoft (can import a large ammount of points from agisoft and then after cleaning export them back into agisoft).

What software would you recomend for this?

12
General / Actual Difference On Mesh "Normal" VS fixed Lens (Nikon)?
« on: October 16, 2016, 09:40:21 PM »
Does anybody done (and i believe someone had to) and has info and even better pictures of actual real differences on generated mesh/model when using "standard", "default" "adjustable" lenses that come standardly with your DSLR camera (18-55mm lens that came with my Nikon D3200 for example) in comparison with FIXED lenses?

I know there is difference when looking on the pictures themselves but i have never actually seen any real test/comparison of meshes of the same model that was captured once with the default lens (18-55mm, at 35mm for example) and once with fixed (35mm lens)?

Is there any actual difference on the mesh? Is it big? Did somebody did this test or have some pictures?

13
Python and Java API / Automatic (batch) export of model with texture?
« on: October 15, 2016, 10:07:39 PM »
Hello i need a code/script allowing me to export automaticaly the generated model/mesh as obj with JPG (or TIF) texture. Im not a scripter but i found this script that allows a lot of batch process i didnt try it yet but i believe it should work:

Code: [Select]
import PhotoScan, os

path = PhotoScan.app.getExistingDirectory("Please choose the folder with .psz files:")

print("Script started")
doc = PhotoScan.app.document
doc.clear()
project_list = os.listdir(path)

for project_name in project_list:
if ".PSZ" in project_name.upper():
doc.open(path + "/" + project_name)
chunk = doc.chunks[0]

chunk.matchPhotos(accuracy=PhotoScan.HighAccuracy, preselection=PhotoScan.GenericPreselection)
chunk.alignCameras()

chunk.buildDenseCloud(quality=PhotoScan.HighQuality)
chunk.buildModel(surface=PhotoScan.Arbitrary, interpolation=PhotoScan.EnabledInterpolation)

chunk.buildUV(mapping=PhotoScan.GenericMapping)
chunk.buildTexture(blending=PhotoScan.MosaicBlending, size=4096)

doc.save()
print("Processed project: " + project_name)

else:
continue

print("Script finished.")

Could someone write additional line that after saving the file, it will also export the mesh as obj with generated texture (tif) for each *.psz file (with the same name as the file (or some unique name).

Is this possible?

Thank you a lot :-)!

14
General / What programs can save *.rcs *.rcp point clouds?
« on: February 07, 2016, 02:58:53 PM »
I need a point cloud from a friend to get into my 3ds max. He uses agisoft photoscan which is able to export point clouds into many formats, but sadly none is compatible with 3ds max. 3ds Max allows to import only rcs and rcp formats which are from autodesk recap (which i do not own and it isnt free AFAIK).

So i want to convert the point clouds from one of the formats supported by agisoft photoscan in some OTHER software to rcp or rcs (agisoft cannot save directly to rcs rcp) and import that into 3ds max.

What ALL programs can save/export into rcs or rcp formats? Recap, what else? Autocad? Inventor? Something else...even free? (believe it or not, this information is hard/unable to be found even on the internet).

15
Hello, im playing with the idea of building my own basic 3D scan system using photogrammetry (agisoft photoscan probably). Only around 20-25 cameras. Currently it looks like i wont be able (price wise) to get the cameras to be all the same type. I will probably have to have 3 different cameras, all from the same vendor (cannon ?) and all circa in the same price range.
But besides vendor and price range, the cameras will range, in age (1st type is new, 2nd type is 3 years old, 3rd type is also 3 years old), and of course mainly in Mpx. The newer type would have 20 Mpx, the older ones (2 types)  will have 16 Mpx) . That means cca 3 types. If im Lucky i will end up with only 2 types, but still 20 Mpx vs 16 Mpx. Will this difference be problem for agisoftphotoscan? Can it handle it (mixing photos from 2-3 different camera types for one capture session (for one model))?

Will it work? Fail completely, or work but the result will be slightly innaccurate?

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