question on multiply by 256

zhyever / PatchFusion

[CVPR 2024] An End-to-End Tile-Based Framework for High-Resolution Monocular Metric Depth Estimation

https://zhyever.github.io/patchfusion/

MIT License

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question on multiply by 256 #28

Closed nikky4D closed 3 months ago

nikky4D commented 4 months ago

I have 3 questions: -- To convert depth output to PNG, you multiply by 256. Why? -- What units are the metric depth output? meters? -- What method do you recommend to scale up the depth results to an input image size?

Thanks

zhyever commented 3 months ago

I don't know the reason but you could refer to here. I just follow the implementation.
meters, yes.
As far as I see, if you adopt a reasonably good tiling strategy, the depth result would have the same resolution as the input. It might be not so necessary for an extra upsample. That's the meaning of PatchFusion

Hopefully, the answers are helpful for you