{
  "id": 493268,
  "title": "A Question About the World Coordinate System",
  "url": "/competitions/image-matching-challenge-2024/discussion/493268",
  "author_name": "何贤",
  "post_date": "2024-04-12T18:13:53.473000",
  "votes": 3,
  "comment_count": 0,
  "views": 0,
  "content": "<p>I have a question. I think that if different world coordinate systems are established, each photo will correspond to different rotation and translation matrices. However, there is no information about establishing world coordinate systems in the original data.<br>\nI found that using COLMAP will establish a default coordinate system. Does this mean that we can only use COLMAP for 3D reconstruction?<br>\nI'm not sure if what I said is accurate. Corrections are welcome if there are any mistakes.😀</p>",
  "messages": [
    {
      "id": 2748931,
      "postDate": "2024-04-12T18:13:53.473Z",
      "content": "<p>I have a question. I think that if different world coordinate systems are established, each photo will correspond to different rotation and translation matrices. However, there is no information about establishing world coordinate systems in the original data.<br>\nI found that using COLMAP will establish a default coordinate system. Does this mean that we can only use COLMAP for 3D reconstruction?<br>\nI'm not sure if what I said is accurate. Corrections are welcome if there are any mistakes.😀</p>",
      "rawMarkdown": "I have a question. I think that if different world coordinate systems are established, each photo will correspond to different rotation and translation matrices. However, there is no information about establishing world coordinate systems in the original data.\nI found that using COLMAP will establish a default coordinate system. Does this mean that we can only use COLMAP for 3D reconstruction?\nI'm not sure if what I said is accurate. Corrections are welcome if there are any mistakes.😀",
      "votes": 3
    }
  ],
  "comments": [],
  "raw_markdown_by_id": {
    "2748931": "I have a question. I think that if different world coordinate systems are established, each photo will correspond to different rotation and translation matrices. However, there is no information about establishing world coordinate systems in the original data.\nI found that using COLMAP will establish a default coordinate system. Does this mean that we can only use COLMAP for 3D reconstruction?\nI'm not sure if what I said is accurate. Corrections are welcome if there are any mistakes.😀"
  }
}