Device and method for classification using classification model and computer readable storage medium

A device for classification using a pre-trained classification model, comprising:

• a feature extraction unit configured to extract, for each of a plurality of images in a target image group to be classified, a feature of the image using a feature extraction layer of the pre-trained classification model;
• a contribution calculation unit configured to calculate, for each of the plurality of images, a contribution of the image to a classification result of the target image group using a contribution calculation layer of the pre-trained classification model;
• a feature aggregation unit configured to aggregate features of the plurality of images extracted by the feature extraction unit based on contributions of the plurality of images calculated by the contribution calculation unit, to obtain an aggregated feature as a feature of the target image group;
• and
• a classification unit configured to classify the target image group based on the feature of the target image group.