How to do it on custom data?
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Hi, Could you provide some information about reconstruct on custom data? And how to get normal maps? Thanks very much.
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Hi,
To obtain the normal maps, follow the instructions in this CVPR'23 work:
https://github.com/satoshi-ikehata/SDM-UniPS-CVPR2023
In short, at each viewpoint, you need to capture a set of images under varying illumination (from my experience, about 10 images per view is sufficient). This can be realized by moving a handheld light source. Input the images of each view to the CVPR'23 work should output a good quality normal map.
Repeat this process for each view, and you can get multi-view normal maps. Since you also captured rgb images, pick one from each view to calibrate the camera parameters. We found Colmap usually fails for such a capture setup, but MetaShape performs more robustly.
We recommend placing the object on a turntable, but moving the camera and tripod should also be fine. Ensure there is a textured background static to the target object or use markers to increase the success rate of camera calibration.