Clarification on MegaDepth Dataset Preparation & Broken Link

[skbhat]

Namaste,

First off, thank you for creating and sharing this excellent feature matcher!

I have a question regarding the preparation of the MegaDepth dataset mentioned in your documentation. The setup guide refers to the LoFTR training instructions, which state:

"We use depth maps provided in the original MegaDepth dataset as well as undistorted images, corresponding camera intrinsics and extrinsics preprocessed by D2-Net..."

Based on this, I believe the correct procedure is:

Download MegaDepth_v1.tar.gz from the original MegaDepth project.

From this file, use only the depth maps.

Download the preprocessed images, camera intrinsics, and extrinsics from the D2-Net link and use them instead of the original images.

Could you please confirm if this understanding of the data preparation steps is correct?

Broken Data Link

I also wanted to report that the Google Drive link for the D2-Net preprocessed images appears to be broken (it returns a 404 error).

If you have an updated or alternative link to download these preprocessed files, could you please provide it?

Thank you for your time and help!

[jvbshsai]

合十礼，

首先，非常感谢您创建并分享了这个优秀的特征匹配器！

我有一个关于文档中提到的 MegaDepth 数据集准备工作的问题。设置指南引用了LoFTR 训练说明，其中提到：

“我们使用原始 MegaDepth 数据集中提供的深度图，以及经D2-Net预处理后的无畸变图像、相应的相机内参和外参…… ”

基于以上分析，我认为正确的步骤是：

从 MegaDepth 原项目下载 MegaDepth_v1.tar.gz。

从该文件中，仅使用深度图。

从 D2-Net 链接下载预处理后的图像、相机内参和外参，并用它们代替原始图像。

请问您对数据准备步骤的理解是否正确？

数据链路故障

我还想报告一下，D2-Net 预处理图像的 Google Drive 链接似乎已损坏（返回 404 错误）。

如果您有更新的或备用的下载这些预处理文件的链接，能否请您提供一下？

感谢您抽出时间提供帮助！

Hello, did you solve it? I met this problem too

[skbhat]

No. There was no response.