OBJECT DETECTION METHODS, DISPLAY METHODS AND APPARATUSES

摘要

Disclosed are object detection method, display methods and apparatuses. The method includes obtaining slice data of inspected luggage in the CT system; generating 3D volume data of objects in the luggage from the slice data; for each object, determining a semantic description including at least a quantifier description of the object based on the 3D volume data; and upon reception of a user selection of an object, presenting the semantic description of the selected object while displaying a 3D image of the object. The above solutions can create a 3D model for objects in the inspected luggage in a relatively accurate manner, and thus provide better basis for subsequent shape feature extraction and security inspection, and reduce omission factor.

主权项

1. A method for inspecting luggage in a CT system, comprising:
obtaining slice data of the inspected luggage in the CT system; generating 3D volume data of at least one object in the luggage from the slice data; calculating first, second and third depth projection images of the object in three directions based on the 3D volume data, wherein projection direction of the third depth projection image is orthogonal to those of the first and second depth projection images; calculating a metric of symmetry, and a duty ratio and aspect ratio for each of the first, second, and third depth projection images, and a metric of similarity between each two of the first, second, and third depth projection images; generating a shape feature parameter of the object at least based on the metrics of symmetry, the metrics of similarity, the duty ratios and aspect ratios of the first to third depth projection images; classify the shape feature parameter with a classifier based on shape feature to obtain a quantifier description expressing the shape of the object; and outputting a semantic description including at least the quantifier description of the object.