8000 point cloud comparison map visualization · Issue #2 · USMizuki/NexusGS · GitHub
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point cloud comparison map visualization #2

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chenkangjie1123 opened this issue Apr 8, 2025 · 4 comments
Open

point cloud comparison map visualization #2

chenkangjie1123 opened this issue Apr 8, 2025 · 4 comments

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@chenkangjie1123
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Hello, your work is so great! I would like to know how you achieved the point cloud comparison map visualization in your paper. I look forward to receiving your reply!

like this~

Image
@chenkangjie1123
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Then, I would like to know why depth is multiplied by alpha when visualizing depth in render.py code～～～ What is the purpose of this operation? I feel that there is not much difference between adding and not adding visualization.

@USMizuki
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USMizuki commented Apr 8, 2025 •
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Thank you！

When rendering point clouds, you can multiply the scale by a really small number. Based on experiments, once it gets small enough, making it even smaller doesn’t really change how it looks.

rendered_image, radii, depth, alpha = rasterizer(
        means3D = means3D,
        means2D = means2D,
        shs = shs,
        colors_precomp = colors_precomp,
        opacities = opacity,
        scales = scales * 0.00000001,
        rotations = rotations,
        cov3D_precomp = cov3D_precomp)

The depth map visualization code is from an early version of DNGaussian, and it should have been fixed in the latest version. I’ll make the changes later.

Thanks for pointing that out!

@USMizuki
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USMizuki commented Apr 8, 2025

替我跟双姐问好😊

@chenkangjie1123
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OKK hhh

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