1. A method, comprising: acquiring, by a system comprising a processor, image data in a view area of an imaging device; dividing the view area into sub-view areas; acquiring an attribute information set of at least one object in a sub-view area of the sub-view areas using first beam scanning; in response to determining that the attribute information set comprises attribute information of objects, dividing the sub-view area or the view area into secondary sub-view areas; acquiring attribute information of at least one object in a secondary sub-view area of the secondary sub-view areas using second beam scanning; and establishing a correspondence between the attribute information of the at least one object in the secondary sub-view area and other image data corresponding to the secondary sub-view area.