Why use -6.58 as the initialization of bias

[Beanocean]

visual-concepts/output/v1/mil_finetune.prototxt

Line 184 in 0e22363

bias_filler { type: "constant" value: -6.58 }

Hi Saurabh,
Recently, I am trying to export this code from Caffe to Pytorch. When tuning the model in Fully-Convolutional Network, I found a very interesting trick in the code.
The bias of the classification layer should be set to -6.58, otherwise, the optimization will be misled. For example, If this value is initialized to zero, the model even does not converge. So I want to know why you use this value as initialization and how did you find it.

[mememimis]

Did you export this code to pytorch?

[Beanocean]

Did you export this code to pytorch?

@mememimis, I have exported it to Pytorch. But still, have some troubles. I will release the code later, hope you can help to refine it together.

[lifeGWT]

Did you export this code to pytorch?

@mememimis, I have exported it to Pytorch. But still, have some troubles. I will release the code later, hope you can help to refine it together.

Can you share your pytorch code? Thank you very much