fix readme png

README.md

@@ -87,7 +87,7 @@ Based on the ImageNet-1k classification dataset, the 24 classification network s
 
 Curves of accuracy to the inference time of common server-side models are shown as follows.
 
-![](./docs/images/models/T4_benchmark/t4.fp32.bs4.main_fps_top1.png)
+![](./docs/images/models/T4_benchmark/t4.fp32.bs1.main_fps_top1.png)
 
 
 Curves of accuracy to the inference time and storage size of common mobile-side models are shown as follows.

README_cn.md

@@ -87,7 +87,7 @@
 
 常见服务器端模型的精度指标与其预测耗时的变化曲线如下图所示。
 
-![](./docs/images/models/T4_benchmark/t4.fp32.bs4.main_fps_top1.png)
+![](./docs/images/models/T4_benchmark/t4.fp32.bs1.main_fps_top1.png)
 
 
 常见移动端模型的精度指标与其预测耗时、模型存储大小的变化曲线如下图所示。