Bad texture issue

[cyrilp]

Hi,

i have issues with the texture génération. Very often some parts of my model have bad blurry texture.

Here for exemple:

Metashape model (ultra high setting, 32x4k texture) (don't forget to select hd for textures in the tool box)
https://viewer.arskan.com/objects/share/6241a4b0eb315945a023cc04

Mac Photocatch model in raw settings:
https://viewer.arskan.com/objects/share/6241a450eb315945a023cbdf

Look around the mouth for example.

[Alexey Pasumansky]

Hello Cyril,

Can you share a sample dataset, where the problem can be reproduced to support@agisoft.com? Including Metashape project (with camera alignment and mesh) and source images.

[cyrilp]

hi, i'm uploading the data right now (27go)

[cyrilp]

Hi Alex,

here is the link to download the data:

https://data2.gigascope.net/data/bm_ramses.rar

let me know

[Alexey Pasumansky]

Hello Cyril,

Thank you for sharing the data, we were able to download the archive.

[cyrilp]

Great ! i hope you'll find out why i'm getting bad results.

for comparison here is the model with good textures i'm getting with apple photocatch (remember to select hd textures).

The 3D model geometry is far better in metashape.

[cyrilp]

I forgot the url:

https://viewer.arskan.com/objects/share/624703e852e58c5c21cee184

[cyrilp]

Hi Alexey, did you have some time to have a look ?

[Alexey Pasumansky]

Hello Cyril,

We have got considerably better results using the following approach:
- generated masks based on the actual mesh model,
- estimated image quality for all cameras (with ignore masked regions option enabled),
- disabled cameras with image quality lower than 0.8,
- disabled cameras looking at the model from behind,
- rebuilt texture.

However, some areas with the blurred texture still can be found they are not that obvious as in the original model.


Generally, you may reconsider the image acquisition process: pay attention to focusing on the model's surface (some images are obviously out of focus), and try to avoid taking multiple images from the same camera location - if you are doing that, it is suggested to use calibrated nodal head and group the corresponding cameras to the "camera station".

[cyrilp]

Hi,

Thanks for your answer, i will try this.

what do you mean disable cameras from behind ? do you mean i have to split my model in two and texture each of them disabling cameras from behind ?

[Alexey Pasumansky]

Hello cyrilp,

In the provided project only one part of the model is present (only front part of the object of interest), so the cameras that are behind of the actual object couldn't help the texturing process. Thus it is better to disable them in advance (before building the texture for the front part of the model).

[DayGeckoArt]

I'm learning drone 3D mapping and I've observed this issue. Agisoft chooses the photo closest to every given location geographically,  at least for creating the orthophoto. Since I mix higher and lower altitude photos, the higher ones often get chosen so I get blurry patches. I have to manually draw a polygon and then choose a different photo for that area. Disabling the more distant photos works, but not if you need parts of those images for coverage elsewhere in the model

[cyrilp]

I have to manually draw a polygon and then choose a different photo for that area

Hi, could you explain how this is done ?

[Alexey Pasumansky]

I have to manually draw a polygon and then choose a different photo for that area

Hi, could you explain how this is done ?

Currently this works for orthomosaic only (cannot be applied to the texture): https://agisoft.freshdesk.com/support/solutions/articles/31000148853-orthomosaic-seamline-editing-patching-