Interactive Viewer

[sp77-1]

How can i use interactive viewer to show final ply file?
Thank you for any tips

[Feng1909]

Can I use the viewer from original gaussian splatting repository?

[kairunwen]

How can i use interactive viewer to show final ply file?
Thank you for any tips

(1) Follow VanillaGS repo's instruction: https://github.com/graphdeco-inria/gaussian-splatting?tab=readme-ov-file#interactive-viewers
(2) You can also import final gaussian.ply to supersplat for visualization: https://playcanvas.com/supersplat/editor

[d-irie]

This is great work and I am very interested.
In my experiments, the final rendered video from render_by_interp.py is of high quality.

However, when I view PointCloud.ply in a 3D viewer such as SIBR Viewer or SuperSplat, some of the scenes are broken.
My investigation shows that the rasterization process in gaussian_renderer/init.py includes the transformation process of Gaussian parameters such as xyz and rotation.
On the other hand, SIBR Viewer does not include a series of transformations, and this difference may be causing the difference in image quality.

Is there any way to resolve this issue?

[kairunwen]

Hi @d-irie, thanks for your interest! Please see issue #18.

[nirmalsnair]

In my experiments, the final rendered video from render_by_interp.py is of high quality.

However, when I view PointCloud.ply in a 3D viewer such as SIBR Viewer or SuperSplat, some of the scenes are broken.

I am experiencing the same issue. The outputted point_cloud.ply data viewed in SuperSplat doesn't look as good visually as the rendered .mp4 video.

I had already changed line 154 of submodules/diff-gaussian-rasterization/cuda_rasterizer/auxiliary.h from p_view.z <= 0.2f to p_view.z <= 0.001f, as suggested in issue #18. Is there something I’m missing?

Video

SuperSplat

[crmlei]

Hi，@nirmalsnair

Can you help me analyze the cause of the problem？

I trained on 38 images extracted from a video I shot myself, and the final outputed video looks good,

But It's strange, why do I open point_cloud.ply with supersplat and see the effect like this?

[kairunwen]

@crmlei Hi, You should click the button in the red box ⬇️

[kairunwen]

@nirmalsnair Hi, maybe you can try to visualize it with nerf_viewers, or Viser, or SIBR_viewers of 3D-GS.

[nirmalsnair]

@kairunwen Thank you for the suggestion. I tried viewing the data using Viser (via experimental/gaussian_splats.py), but the quality is still quite poor.

[kairunwen]

@nirmalsnair Hi, you could try increasing the number of training iterations here: https://github.com/NVlabs/InstantSplat/blob/main/scripts/run_infer.sh#L19.

[nirmalsnair]

Hi @kairunwen, thank you for the suggestion. I tried increasing the iterations from 1,000 to 10,000 and 30,000. While the PSNR improved significantly—from 33.23 at 1,000 iterations to 42.02 at 7,000 iterations, and further to 44.91 at 30,000 iterations—the visual quality noticeably degraded rather than improving.

The run log is attached below. Any idea what might be causing this issue?

Run log for 30,000 iterations

(instantsplat) nirmal@Raider:~/Documents/InstantSplat$ bash scripts/run_train_infer.sh

========= santorini: Dust3r_coarse_geometric_initialization =========
... loading model from submodules/dust3r/checkpoints/DUSt3R_ViTLarge_BaseDecoder_512_dpt.pth
instantiating : AsymmetricCroCo3DStereo(enc_depth=24, dec_depth=12, enc_embed_dim=1024, dec_embed_dim=768, enc_num_heads=16, dec_num_heads=12, pos_embed='RoPE100', patch_embed_cls='PatchEmbedDust3R', img_size=(512, 512), head_type='dpt', output_mode='pts3d', depth_mode=('exp', -inf, inf), conf_mode=('exp', 1, inf), landscape_only=False)
<All keys matched successfully>
>> Loading images from /home/nirmal/Documents/InstantSplat/data/sora/santorini/3_views/images
 - adding frame_00.jpg with resolution 1920x1080 --> 512x288
 - adding frame_06.jpg with resolution 1920x1080 --> 512x288
 - adding frame_12.jpg with resolution 1920x1080 --> 512x288
 (Found 3 images)
ori_size (1920, 1080)
>> Inference with model on 6 image pairs
100%|████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████| 6/6 [00:00<00:00,  8.77it/s]
 init edge (0*,1*) score=np.float64(9.563681602478027)
 init edge (1,2*) score=np.float64(8.826717376708984)
 (setting focal #0 = 440.46165974934894)
 (setting focal #1 = 440.46165974934894)
 (setting focal #2 = 440.46165974934894)
 init loss = 0.027959637343883514
Global alignement - optimizing for:
['pw_poses', 'im_depthmaps', 'im_poses', 'im_conf.0', 'im_conf.1', 'im_conf.2']
100%|███████████████████████████████████████████████████████████████████████████████████████████| 300/300 [00:03<00:00, 77.20it/s, lr=0.01 loss=0.00364887]
Time taken for 3 views: 4.721898317337036 seconds
scale factor is not same for x3.75 and y 3.75
scale factor is not same for x3.75 and y 3.75
scale factor is not same for x3.75 and y 3.75
========= santorini: Train: jointly optimize pose =========
Optimizing ./output/infer/sora/santorini/3_views_30000Iter_1xPoseLR/
Output folder: ./output/infer/sora/santorini/3_views_30000Iter_1xPoseLR/
Reading camera 3/3
Loading Training Cameras
[ INFO ] Encountered quite large input images (>1.6K pixels width), rescaling to 1.6K.
 If this is not desired, please explicitly specify '--resolution/-r' as 1
train_camera_num:  3
Loading Test Cameras
test_camera_num:  0
Number of points at initialisation :  356778
Training progress:   2%|█▎                                                                             | 500/30000 [00:25<22:49, 21.54it/s, Loss=0.0222455]
[ITER 500] Evaluating train: L1 0.012928157113492489 PSNR 29.113671620686848
Training progress:   3%|██                                                                             | 800/30000 [00:41<21:46, 22.35it/s, Loss=0.0153423]
[ITER 800] Evaluating train: L1 0.009307358103493849 PSNR 31.9732723236084
Training progress:   3%|██▌                                                                           | 1000/30000 [00:50<21:25, 22.56it/s, Loss=0.0133920]
[ITER 1000] Evaluating train: L1 0.008184022270143032 PSNR 33.19559605916341
Training progress:   5%|███▉                                                                          | 1500/30000 [01:13<20:41, 22.96it/s, Loss=0.0094947]
[ITER 1500] Evaluating train: L1 0.006391201789180437 PSNR 35.51490783691406
Training progress:   7%|█████▏                                                                        | 2000/30000 [01:36<20:20, 22.94it/s, Loss=0.0076353]
[ITER 2000] Evaluating train: L1 0.005400731693953276 PSNR 36.96710077921549
Training progress:  10%|███████▊                                                                      | 3000/30000 [02:21<19:23, 23.20it/s, Loss=0.0060085]
[ITER 3000] Evaluating train: L1 0.004438495961949229 PSNR 38.91851806640625
Training progress:  13%|██████████▍                                                                   | 4000/30000 [03:06<18:57, 22.85it/s, Loss=0.0049146]
[ITER 4000] Evaluating train: L1 0.0037851009983569384 PSNR 40.39331309000651
Training progress:  17%|█████████████                                                                 | 5000/30000 [03:51<18:16, 22.80it/s, Loss=0.0044015]
[ITER 5000] Evaluating train: L1 0.0035195722399900355 PSNR 41.246222178141274
Training progress:  20%|███████████████▌                                                              | 6000/30000 [04:36<17:25, 22.95it/s, Loss=0.0040494]
[ITER 6000] Evaluating train: L1 0.0032493871791909137 PSNR 41.90483856201172
Training progress:  23%|██████████████████▏                                                           | 7000/30000 [05:20<16:40, 22.98it/s, Loss=0.0039207]
[ITER 7000] Evaluating train: L1 0.0031754142449547844 PSNR 42.31662623087565
Training progress: 100%|█████████████████████████████████████████████████████████████████████████████| 30000/30000 [21:44<00:00, 23.00it/s, Loss=0.0027425]

[ITER 30000] Evaluating train: L1 0.00244275185589989 PSNR 44.90543111165364

[ITER 30000] Saving Gaussians

Training complete.
========= santorini: Render interpolated pose & output video =========
Looking for config file in ./output/infer/sora/santorini/3_views_30000Iter_1xPoseLR/cfg_args
Config file found: ./output/infer/sora/santorini/3_views_30000Iter_1xPoseLR/cfg_args
Rendering ./output/infer/sora/santorini/3_views_30000Iter_1xPoseLR/
Loading trained model at iteration 30000
Reading camera 200/200
Loading Training Cameras
[ INFO ] Encountered quite large input images (>1.6K pixels width), rescaling to 1.6K.
 If this is not desired, please explicitly specify '--resolution/-r' as 1
train_camera_num:  200
Loading Test Cameras
test_camera_num:  200
Rendering progress: 100%|████████████████████████████████████████████████████████████████████████████████████████████████| 200/200 [00:52<00:00,  3.81it/s]
IMAGEIO FFMPEG_WRITER WARNING: input image is not divisible by macro_block_size=16, resizing from (1600, 900) to (1600, 912) to ensure video compatibility with most codecs and players. To prevent resizing, make your input image divisible by the macro_block_size or set the macro_block_size to 1 (risking incompatibility).

1,000 iterations

10,000 iterations

30,000 iterations

[kairunwen]

@nirmalsnair Hi, we have updated the code with the preprint accordingly. You can first run the script scripts/run_infer.sh, and then set the training iterations to around 1500. According to your log, the PSNR of the training set reaches 35+ at this point, and increasing the iterations further may lead to overfitting.

[nirmalsnair]

Thanks, @kairunwen! The updated code resolves the issue, and the splat now looks significantly better.

[pengcanon]

In my experiments, the final rendered video from render_by_interp.py is of high quality.
However, when I view PointCloud.ply in a 3D viewer such as SIBR Viewer or SuperSplat, some of the scenes are broken.

I am experiencing the same issue. The outputted point_cloud.ply data viewed in SuperSplat doesn't look as good visually as the rendered .mp4 video.

I had already changed line 154 of submodules/diff-gaussian-rasterization/cuda_rasterizer/auxiliary.h from p_view.z <= 0.2f to p_view.z <= 0.001f, as suggested in issue #18. Is there something I’m missing?

Video

SuperSplat

Have you figured out why there's such a big discrapency between rendered video and actual splats? They were generated under the same number of iterations and setting etc., what was the cause?

[nirmalsnair]

@pengcanon I'm not sure what’s causing the issue since I haven’t had a chance to review the code, but the update resolves it.