1. If you use .ckpt file for inference, please check the details in 
   https://gitee.com/mindspore/mindspore/blob/master/model_zoo/official/cv/googlenet/README.md
   The steps to perform inference using checkpoint file is the same for other models (e.g., resnet50). 

2. If you use .geir or .onnx file for inference, please check the details in 
    https://www.mindspore.cn/tutorial/zh-CN/master/use/multi_platform_inference.html