The "collected_semantic_feature" is not initialized correctly in diff-gaussian-rasterization/cuda_rasterizer/backward.cu?

[YangZhou6]

In diff-gaussian-rasterization/cuda_rasterizer/backward.cu, I don't know where "collected_semantic_feature" was given a value, is there an error here? The "collected_semantic_feature" has only been allocated storage space in diff-gaussian-rasterization/cuda_rasterizer/rasterizer_impl.cu. I can't reduce semantic loss using your code. I want to know where the problem is.

`
for (int ch = 0; ch < NUM_SEMANTIC_CHANNELS; ch++) { const float f = collected_semantic_feature[ch BLOCK_SIZE + j]; // Update last semantic feature (to be used in the next iteration) accum_semantic_feature_rec[ch] = last_alpha last_semantic_feature[ch] + (1.f - last_alpha) * accum_semantic_feature_rec[ch]; last_semantic_feature[ch] = f;

const float dL_dfeaturechannel = dL_dfeaturepixel[ch]; /**/ dL_dalpha += (f - accum_semantic_feature_rec[ch]) * dL_dfeaturechannel; /**/

// Update the gradients w.r.t. semnatic feature of the Gaussian. // Atomic, since this pixel is just one of potentially // many that were affected by this Gaussian. atomicAdd(&(dL_dsemantic_feature[global_id NUM_SEMANTIC_CHANNELS + ch]), dchannel_dsemantic_feature dL_dfeaturechannel); } `

[runnerhdh]

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[Lans1ot]

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