In the classification loss calculation, ensure that the ignored regions of the image do not participate, meaning they should not contribute to the classification loss.

[eorroot]

Prerequisite

• I have searched the existing and past issues but cannot get the expected help.
• I have read the FAQ documentation but cannot get the expected help.
• The bug has not been fixed in the latest version.

💬 Describe the reimplementation questions

I believe the code style of MMYOLO is excellent for developers and represents a valuable open-source project. I am interested in starting a research project based on V6 for a specific task involving the treatment of image neglected regions. These neglected regions do not contribute when calculating the classification loss. I have already marked the ignored regions with mask tags, but I am encountering problems with the loss function. I would appreciate any assistance your team can provide to help me resolve this issue.

Environment

Expected results

Additional information