LSKNet implementation

[zcablii]

Thanks for your contribution and we appreciate it a lot. The following instructions would make your pull request more healthy and more easily get feedback. If you do not understand some items, don't worry, just make the pull request and seek help from maintainers.

Motivation

An implementation of LSKNet ("Large Selective Kernel Network for Remote Sensing Object Detection" at: https://arxiv.org/pdf/2303.09030.pdf)

Modification

An implementation of LSKNet ("Large Selective Kernel Network for Remote Sensing Object Detection" at: https://arxiv.org/pdf/2303.09030.pdf)

BC-breaking (Optional)

Does the modification introduce changes that break the back-compatibility of the downstream repos?
If so, please describe how it breaks the compatibility and how the downstream projects should modify their code to keep compatibility with this PR.
N/A

Use cases (Optional)

If this PR introduces a new feature, it is better to list some use cases here, and update the documentation.
N/A

Checklist

1. Pre-commit or other linting tools are used to fix the potential lint issues.
2. The modification is covered by complete unit tests. If not, please add more unit test to ensure the correctness.
3. The documentation has been modified accordingly, like docstring or example tutorials.

[RangiLyu]

Thanks for your contribution! Before merge this PR, you need to format your code with pre-commit. Please run pip install pre-commit and then run pre-commit run --all-files to format your code.

[RangiLyu]

Would you like to allow us to host your models on our server?

[zcablii]

Sure! That will be great!

[zytx121]

LGTM. Just wait for the model link to be updated.

[RangiLyu]

Hi, I uploaded the models and logs to our server. You can update the links in these tables.

pretrained models:
https://download.openmmlab.com/mmrotate/v1.0/lsknet/backbones/lsk_s_backbone-e9d2e551.pth
https://download.openmmlab.com/mmrotate/v1.0/lsknet/backbones/lsk_t_backbone-2ef8a593.pth

lsk_s_fpn_1x_dota_le90:
https://download.openmmlab.com/mmrotate/v1.0/lsknet/lsk_s_fpn_1x_dota_le90/lsk_s_fpn_1x_dota_le90_20230116.log
https://download.openmmlab.com/mmrotate/v1.0/lsknet/lsk_s_fpn_1x_dota_le90/lsk_s_fpn_1x_dota_le90_20230116-99749191.pth

lsk_t_fpn_1x_dota_le90:
https://download.openmmlab.com/mmrotate/v1.0/lsknet/lsk_t_fpn_1x_dota_le90/lsk_t_fpn_1x_dota_le90_20230206.log
https://download.openmmlab.com/mmrotate/v1.0/lsknet/lsk_t_fpn_1x_dota_le90/lsk_t_fpn_1x_dota_le90_20230206-3ccee254.pth

lsk_s_ema_fpn_1x_dota_le90:
https://download.openmmlab.com/mmrotate/v1.0/lsknet/lsk_s_ema_fpn_1x_dota_le90/lsk_s_ema_fpn_1x_dota_le90_20230212.log
https://download.openmmlab.com/mmrotate/v1.0/lsknet/lsk_s_ema_fpn_1x_dota_le90/lsk_s_ema_fpn_1x_dota_le90_20230212-30ed4041.pth

lsk_s_fpn_3x_hrsc_le90:
https://download.openmmlab.com/mmrotate/v1.0/lsknet/lsk_s_fpn_3x_hrsc_le90/lsk_s_fpn_3x_hrsc_le90_20230205.log
https://download.openmmlab.com/mmrotate/v1.0/lsknet/lsk_s_fpn_3x_hrsc_le90/lsk_s_fpn_3x_hrsc_le90_20230205-4a4a39ce.pth

[RangiLyu]

update this link

[OpenMMLab-Assistant-004]

Hi @zcablii ！First of all, we want to express our gratitude for your significant PR in the mmrotate project. Your contribution is highly appreciated, and we are grateful for your efforts in helping improve this open-source project during your personal time. We believe that many developers will benefit from your PR.

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