LRM 代码精读 4-[Rendering]

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Triplane decoder that gives RGB and sigma values from sampled features.

Concatenate triplane features(3 * n_feature) to hidden_dim

linear layers(hd)

output → (hd → 1 + 3)

batch, n_planes, _M, _C = sampled_features.shape

[batch_size * num_samples, n_planes * n_features] → net() →

[batch_size, num_samples(M), output_dim]

sigmoid to clamp RGB

return RGB, sigma

Synthesizer that renders a triplane volume with planes and a camera.

Create rays based on camera location and intrinsic

(cam2world, intrinsics, resolution, anchor(-1, 2))

→ (ray_origins(N * M, origin_loc_dim), ray_directions)

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Kiss your perfect day goodbye —>