RT-DETR中的where

[sdreamforchen]

问题确认 Search before asking

• 我已经查询历史issue，没有发现相似的bug。I have searched the issues and found no similar bug report.

Bug组件 Bug Component

No response

Bug描述 Describe the Bug

PaddleDetection/ppdet/modeling/transformers/rtdetr_transformer.py

Line 508 in a3e9c92

anchors = paddle.where(valid_mask, anchors,

以及https://github.com/PaddlePaddle/PaddleDetection/blob/a3e9c925074dd91f98516c2bac057d190af9d7aa/ppdet/modeling/transformers/rtdetr_transformer.py#L524C16-L524C16
您好，我自己单独把这个_generate_anchors写了一个python跑了一下，valid_mask恒为true：
1 onnx导出为false
2 这两个where是否有必要哇。
应该是我理解错了。 麻烦解答一下，谢谢！！！

复现环境 Environment

develop分支

Bug描述确认 Bug description confirmation

• 我确认已经提供了Bug复现步骤、代码改动说明、以及环境信息，确认问题是可以复现的。I confirm that the bug replication steps, code change instructions, and environment information have been provided, and the problem can be reproduced.

是否愿意提交PR？ Are you willing to submit a PR?

• 我愿意提交PR！I'd like to help by submitting a PR!

[lyuwenyu]

其实他是为了保证生成的anchors是个合格的bbox 在看前面生成的时候有些超参数控制的 不排除在某些条件下生成的box有问题 所以才有这个逻辑

PaddleDetection/ppdet/modeling/transformers/rtdetr_transformer.py

Lines 505 to 506 in a3e9c92

	valid_mask = ((anchors > self.eps) *
	(anchors < 1 - self.eps)).all(-1, keepdim=True)