IPhone exports the original image by default, and there is no overlay filter. I found that there are two ways to export a picture with a filter superimposed on it. The premise of using these two methods is that you need software that can open iPhone folders, such as synchronization assistant, itools, etc. You don't need to jailbreak to use these softwares. I often use the synchronization assistant. 1. The original image file superimposed with the filter is actually saved in a hidden folder: /PhotoData/Metadata/DCIM, and there are folders such as 100APPLE, 10 1APPLE below, from which you can copy. The file that comes out here is not jpg, but jpg.altpath file. You can open it directly with picture software, but it is best to change it to jpg file. It's easy to change the leaflet, just rename it and get rid of it. Altpath behind it. I don't know the method of batch change. This is also an important means to slim down the iPhone: since these files cannot be deleted from the iPhone's photo app by themselves, the garbage cleaning function of tools such as synchronization assistants will not be cleaned (because they are not garbage). But over time, they will become very big, and may reach one or two G's. If you delete all the photos in the "camera film" and find that your photo app still takes up a lot of space (you can find it in "Settings-General-Use"), then there is no doubt that they are occupied. If you don't mind the picture being compressed, you can copy it from photo stream. Photo stream pictures have two characteristics: ① compressed to about half the size of the original picture; ② Preserve the filter effect. Photo stream's picture address is: /PhotoStreamsData. Find a folder full of numbers under this folder. After entering, folders such as 100APPLE, 10 1APPLE will appear. This is your photo of photo stream.