yolo

[keleduishui]

你好，如果我的数据集图片大小为20481000，那么我将该图片进行缩放和填充操作使其大小为640640，这样是否意味着我的标签数据也要进行修改？应该如何进行修改呢？

[UltralyticsAssistant]

👋 Hello @keleduishui, thank you for reaching out to Ultralytics 🚀! An Ultralytics engineer will assist you soon. In the meantime, here are some resources that might help:

We recommend visiting the Docs for guidance. You'll find useful information about Python and CLI usage, which could have answers to your query.

If your question is regarding data resizing and label adjustment, please ensure you check our data preparation guidelines. Adjusting labels is necessary when images are resized and padded, as this might affect the coordinates in your annotations.

If this is about a specific implementation or a 🐛 bug, please provide a minimum reproducible example to help us understand the issue better.

Feel free to join our community for real-time discussions on Discord 🎧 or dive into more structured conversations on Discourse.

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pip install -U ultralytics

Environments

You can run YOLOv8 in verified environments:

• Notebooks with free GPU:
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• Google Cloud Deep Learning VM. See the GCP Quickstart Guide
• Amazon Deep Learning AMI. See the AWS Quickstart Guide
• Docker Image: See the Docker Quickstart Guide

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[glenn-jocher]

你好，是的，缩放和填充图片后，标签数据也需要相应调整。可以使用 YOLO 的数据预处理功能来自动处理这些变化。

[glenn-jocher]

YOLO会自动调整输入图像的尺寸，无需手动预处理。

[keleduishui]

嗨你好，我应该如何冻结yolov8的backbon部分，以及我在ultralytics的哪里可以了解到冻结yolo的知识

[glenn-jocher]

你好，可以通过设置freeze参数来冻结YOLOv8的backbone部分。详细信息可以在Ultralytics的文档中找到。

[keleduishui]

你好，我需要对yolo进行迁移学习，在预训练时yolo检测的类别为7，但是经过迁移学习后yolo的检测类别为5，请问我需要更换全连接层吗？如果需要更换请问应该使用什么代码来更换全连接层？

[glenn-jocher]

@keleduishui 你好，YOLO在迁移学习时会自动调整类别数量，无需手动更换全连接层。只需在数据配置文件中更新类别数即可。