{ "id": 619391, "title": "​For ECG lead numerical values:", "url": "/competitions/physionet-ecg-image-digitization/discussion/619391", "author_name": "", "post_date": "2025-11-14T03:48:37.843226700Z", "votes": null, "comment_count": 3, "views": 0, "content": "

Are the start and end points of each lead's data aligned with the edges or the center of the thick boundary lines? We've observed that these dividing lines are several pixels wide, and we need to determine the exact positioning reference for accurate signal processing and SNR calculations.

", "messages": [ { "id": "3323188", "postDate": "11/14/2025 03:48:37", "content": "

Are the start and end points of each lead's data aligned with the edges or the center of the thick boundary lines? We've observed that these dividing lines are several pixels wide, and we need to determine the exact positioning reference for accurate signal processing and SNR calculations.

", "rawMarkdown": "Are the start and end points of each lead's data aligned with the edges or the center of the thick boundary lines? We've observed that these dividing lines are several pixels wide, and we need to determine the exact positioning reference for accurate signal processing and SNR calculations.", "votes": null }, { "id": "3323189", "postDate": "11/14/2025 03:49:24", "content": "

@r2241272

", "rawMarkdown": "r2241272", "votes": null }, { "id": "3323663", "postDate": "11/14/2025 11:27:45", "content": "

If you zoom in really closely and look at where the signals start and end, it seems like it's the middle.\n\"\"

", "rawMarkdown": "If you zoom in really closely and look at where the signals start and end, it seems like it's the middle.\n![](https://storage.googleapis.com/kagglesdsdata/competitions/97984/14096757/test/1053922973.png?X-Goog-Algorithm=GOOG4-RSA-SHA256&X-Goog-Credential=databundle-worker-v2%40kaggle-161607.iam.gserviceaccount.com%2F20251113%2Fauto%2Fstorage%2Fgoog4_request&X-Goog-Date=20251113T031229Z&X-Goog-Expires=345600&X-Goog-SignedHeaders=host&X-Goog-Signature=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)", "votes": null }, { "id": "3324779", "postDate": "11/15/2025 02:58:47", "content": "

Sub pixel coordinate system. The start can be 3.0, 3.5, 3.6, 3.578, etc… it really depends on how the leaderboard goes and how accurate we want to go …

", "rawMarkdown": "Sub pixel coordinate system. The start can be 3.0, 3.5, 3.6, 3.578, etc… it really depends on how the leaderboard goes and how accurate we want to go …", "votes": null } ], "comments": [ { "id": 3323189, "author_name": "www051586401319", "author_url": "", "post_date": "11/14/2025 03:49:24", "content": "

@r2241272

", "votes": null, "replies": [] }, { "id": 3323663, "author_name": "davidlist", "author_url": "", "post_date": "11/14/2025 11:27:45", "content": "

If you zoom in really closely and look at where the signals start and end, it seems like it's the middle.\n\"\"

", "votes": null, "replies": [] }, { "id": 3324779, "author_name": "hengck23", "author_url": "", "post_date": "11/15/2025 02:58:47", "content": "

Sub pixel coordinate system. The start can be 3.0, 3.5, 3.6, 3.578, etc… it really depends on how the leaderboard goes and how accurate we want to go …

", "votes": null, "replies": [] } ], "raw_markdown_by_id": { "3323188": "Are the start and end points of each lead's data aligned with the edges or the center of the thick boundary lines? We've observed that these dividing lines are several pixels wide, and we need to determine the exact positioning reference for accurate signal processing and SNR calculations.", "3323189": "r2241272", "3323663": "If you zoom in really closely and look at where the signals start and end, it seems like it's the middle.\n![](https://storage.googleapis.com/kagglesdsdata/competitions/97984/14096757/test/1053922973.png?X-Goog-Algorithm=GOOG4-RSA-SHA256&X-Goog-Credential=databundle-worker-v2%40kaggle-161607.iam.gserviceaccount.com%2F20251113%2Fauto%2Fstorage%2Fgoog4_request&X-Goog-Date=20251113T031229Z&X-Goog-Expires=345600&X-Goog-SignedHeaders=host&X-Goog-Signature=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)", "3324779": "Sub pixel coordinate system. The start can be 3.0, 3.5, 3.6, 3.578, etc… it really depends on how the leaderboard goes and how accurate we want to go …" }, "source": "meta" }