Centernet bbox height width label

[soans1994]

hello author,

I am generating custom dataset for centernet model. can you please help me understand how to create height width labels for multi class. I know how to create Gaussian heatmap. For example if I have 20 classes and if output size is 128x128, I will create empty numpy array of size 128x128x20 and append every class heatmap into 3rd channel.

but for height width according to your paper, it is 128,128,2. I know 2 channel for height and width. Does it mean maximum object limit is 128x128=16284. Can you please explain how to append the data and which axis. I am confused how it can work for multi classes.

Thank you