Reading Mesh UV Stats from Python

[wojtek]

Is it possible to read stats like Fill ratio or Overlap ratio through python?

Normally this is accessed through Tools -> Mesh -> View Mesh UVs

[Alexey Pasumansky]

Hello wojtek,

Do you need to export them as images, or access/calculate the related information?

[wojtek]

I need to access the information so that I can iterate on the mesh until the stats meet my criteria (for example fill ratio > 60%)

Sometimes decimating 1 triangle down means a much better Unwrap. It would also help if Metashape had a built in parameter for desired fill ratio/overlap so the app handles it for us.

[wojtek]

Should I make a better case for this or is this something that you already acknowledge and no further sales pitch is needed?

I can provide examples of how much the fill ratio differs based purely on slightly different mesh (ie, decimated down by 1 triangle)

[Alexey Pasumansky]

Hello wojtek,

By current means of Python API I can only suggest to access model.texture() as an image and check the fourth component in the color tuple (related to Alpha - transparency, value). If the value is 255 - the texture pixel is used, if 0 - then it is unused. Ratio of 255-values to the image dimensions should give you the fill ratio (probably with numpy you can access this statistics faster).

[wojtek]

Ah, that should do it for now. Thanks!