Question about the object-centric representation of each slot

[lehduong]

Maybe this is not the right place to ask this question, but I would like to initiate a discussion about the thing puzzling me when reading the paper.

My question is: In the paper, the author does not explicitly enforce each slot to represent exactly a single object, then why did not the network learn to use each slot for more than 1 object in the image reconstruction task? Is there any inductive bias imposed by the architecture itself?