Results 1 issues of yikai xia

Deferring the format conversion can significantly improve the performance of partial screenshots, reducing the process time taken from 6.16 seconds to 3.6 seconds in my case ![QQ截图20221003202823](https://user-images.githubusercontent.com/52817618/193577211-6c7143fb-7328-447d-ae4b-34786460c307.png) ![QQ截图20221003202833](https://user-images.githubusercontent.com/52817618/193577225-8c0ee058-9f3a-41bd-b124-0d2e4464faf1.png)