Can a filter be removed from a photo?
Sometimes, completely; usually, only in part. The answer depends on one thing — whether you still have the photograph from before the filter — and no tool can change that answer.
The short answer
A filter is a rule for changing every pixel. If you still have the pixels from before the rule was applied, the filter can be removed by simply not applying it. If you only have the pixels from after, the filter cannot be removed — only approximated — because many different originals would have produced the same result.
That is why the lab here never touches the file you open. Every look is applied to a copy, and the copy is the only thing you download. The original stays on your device exactly as it was.


