A method for processing the packages in a material handling environment is disclosed. The method includes receiving an image of a field of view of an image capturing device. The image comprising at least one decodable indicia having a predefined shape, the at least one decodable indicia attached to a package. The method further includes identifying one or more decodable indicia image coordinates, wherein each of the one or more decodable indicia image coordinates define a corner of the at least one decodable indicia using a 2-dimensional (2D) coordinate system. The method further includes transforming the one or more decodable indicia image coordinates to one or more decodable indicia spatial coordinates in the 3D coordinate system. Further, the method includes comparing the one or more decodable indicia spatial coordinates with one or more 3D region coordinates to determine whether the package is within a 3D region.