Exporting PNG images from O3DVisualizer in higher dpi

[SamTov]

Checklist

• [X] I have searched for similar issues.
• [X] For Python issues, I have tested with the latest development wheel.
• [X] I have checked the release documentation and the latest documentation (for master branch).

My Question

I would like to export a PNG based on a current scene using the O3DVisualizer. I call the method:

vis.export_current_image

But the resolution is quite bad. Can I set the DPI of the resulting image somewhere?

[whu-lyh]

Any progress?

[SamTov]

Not from Open3D but I resorted to exporting scenes into Mitsuba and then rendering in 4K and getting the nice path tracing and all that goes with it. I have it in the ZnVis package:

https://github.com/zincware/ZnVis

Znvis takes numpy arrays and some mesh definitions and takes care of the mesh visualization, trajectory playing, and rendering for either screenshots or videos.

If you want to do it yourself, check out the rendering module:

https://github.com/zincware/ZnVis/blob/main/znvis/rendering/mitsuba.py

to see how to set the camera to be the correct metric for Mitsuba.

[whu-lyh]

Thanks