Jianyuan Wang comments

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                                            Jianyuan Wang

A stupid question, is it possible to get the local features for each input image?

What do you mean by local features? Given the size you mentioned there, do you want a CxH_localxW_local feat map? For example, if you want features from NetVLAD, you can...

How to generate a database

``` from hloc.utils.database import COLMAPDatabase db = COLMAPDatabase.connect(database) ``` More details: https://github.com/cvg/Hierarchical-Localization/blob/e3e953f4db00c3b9b14951482349d5ddd9424452/hloc/triangulation.py#L36-L61

SFM on Sequential Image Data

You can check COLMAP https://github.com/colmap/colmap/blob/a36156a64191127f83f6011616044d889667209c/src/colmap/sensor/models.h#L224 for its definition. k is the radial distortion parameter ``` // Simple camera model with one focal length and one radial distortion // parameter. //...

Why is there no direct way to work in known camera intrinsic and extrinsic in the reconstruction process?

check https://github.com/cvg/Hierarchical-Localization

Stuck in levenberg_marquardt_strategy.cc loop for hours

Hi @hsmmoj , how many images do you have?

Automatic Reconstruction with only "dense" checked does not do much.

Colmap expects you to run sparse reconstruction first to get sparse 3d point clouds and camera poses, and then can run dense reconstruction. If you don't want to run sparse...

Solve camera poses?

Hi @antithing , feel free to check https://github.com/facebookresearch/vggsfm

Tracking head running out of memory

Hi. I tried to reproduce this but it seems working correctly for me. I can dig into this further though chunking may give you something good at the stage. Another...

Support for absolute scale using GT poses and intrinsics?

Hi @booker-max , Your proposed solutions look great. I would prefer the second option as it does not need to finetune a model. For the first one, you may need...

Cannot work on rigidly rotation object.

Hi I guess it is due to the cropping methods, for example, something related to this: https://github.com/facebookresearch/vggt/pull/57 Would you mind sharing the whole image set so i can have a...