Why are RAW files considered harder to manipulate than JPEGs?
Asked 12/1/2016
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People sometimes say RAW files are harder to alter, and that contests ask for RAWs as evidence an image hasn’t been heavily manipulated. But RAW is still just digital data, so in principle it can be edited. What actually makes a RAW file more difficult to manipulate than a JPEG or TIFF, and why do competitions treat it as stronger evidence of an original capture?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
9y ago
2 Answers
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Nothing makes raw files difficult to manipulate for someone with the right expertise and tools. It's just that there aren't many folks around who have those tools and expertise.
The tools needed to manipulate a raw file into a jpeg are much more widespread and well known than those needed to manipulate a raw file into a different raw file. That is probably where the perception that raw files are more difficult to manipulate comes from: most organizers of such contests are more familiar themselves with how to produce heavily manipulated jpegs from raw files. Most of them are probably not aware that raw data can be manipulated at all, much less how one would go about doing it. I mean, they don't even understand what 300 dpi (doesn't) mean in a display-size agnostic digital environment.
Ironically, the news organization Reuters has it the other way around: They will only accept images that (appear to) have been generated as jpegs in camera at the time the images were shot.
Originally by user15871. Source · Licensed CC BY-SA 4.0
user15871
9y ago
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Generated from our catalog & community — verify before relying on it.
RAW files aren’t inherently tamper-proof. They’re just digital files, so with the right tools and expertise they can be altered.
What makes them seem harder to manipulate is mostly practicality:
- A RAW file contains minimally processed sensor data, not a finished image.
- To make believable edits directly in RAW, you’d need camera-specific knowledge and tools.
- Common editing workflows are designed to convert RAW into JPEG/TIFF, not to write a modified RAW back out.
- Edits like object removal or major scene changes are much easier in rendered image formats than by working backward into sensor data.
So contests ask for RAW files mainly because they are a good indicator that the photographer has the original capture and because the file shows what the camera recorded before normal image editing. That makes RAW a useful piece of evidence of originality, but not absolute proof that no manipulation occurred.
In short: RAW files are not secure against editing; they’re just less convenient to alter convincingly, and there are fewer tools and fewer people able to do it well.
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