给图片生成英文描述，输入为图片，输出为句子(Image captioning, please refer to the source for more details: https://github.com/LuoweiZhou/e2e-gLSTM-sc)

An image retrieval system is a computer system for browsing, searching and retrieving images from a large database of digital images. Most traditional and common methods of image retrieval utilize some method of adding metadata such as captioning, ke