如果我想单独识别人，可以在已有的模型上进行修改吗

[15651196171]

Welcome to propose a new feature! To help us understand your great feature, please provide following information:

1. A clear and concise description of the proposed feature.
2. Tell us why the feature is useful.
3. If possible, please show related codes .

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欢迎提出一个新功能需求，为了帮助我们更好理解您的需求，辛苦提供下面信息：

1. 清晰简洁的语言提出新功能需求。
2. 请描述这个需求的必要性。
3. 如果可以，辛苦您提供相关代码实现效果。

[shiyutang]

We have pphumanseg that only segment humans in the image/video,