After the photos processed by the filter in iOS7 are synchronized to the computer, the filter effect disappears, because the filter processing in iOS7 is saved in the form of metadata, rather than actually modifying the pixels of the photos. So when photos are synchronized to the computer, the computer can't recognize these metadata, which leads to the disappearance of the filter effect.

In order to make the photos processed by iOS7' s own filter not disappear after being synchronized to the computer, you can try the following methods:

1. Use iCloud Photo Gallery: Sync photos to iCloud Photo Gallery, and then use iCloud Photo Gallery to view photos on your computer, so as to preserve the filter effect.

2. Use third-party tools: use third-party tools (such as Lightroom, Photoshop, etc.) to open photos. ) to preserve the filter effect.

It should be noted that the above methods are for reference only, and the specific implementation methods need to be adjusted according to the specific situation. In addition, if you need to keep the filter effect on the computer, it is recommended to adjust the filter effect as much as possible when taking pictures to avoid problems in post-processing.