how can imagedata without bbox using image_processing

[hsjkdjj]

I find there is
'image/object/bbox/xmin',
'image/object/bbox/ymin',
'image/object/bbox/xmax',
'image/object/bbox/ymax"
in image_processing,how can a dataset without bbox use it?

[Cyber-Neuron]

boundary box只是一个数据结构，没有或者不用的话，可以忽略的