![]() ![]() If it is a minor detail you redact, the risk may be acceptable. In the end: Try to figure out if it is worth the risk of posting the image. You may also find data identifying the camera (even serial numbers) that you should remove. But other data, like camera GPS and other sensor data, should be removed. Some of the data may be necessary to properly display the image. There are numerous tools to review and remove or modify the metadata. Most images include some form of metadata, for example, EXIF data. Reducing the image's resolution may help reduce the probability of this happening. Also, be aware of reflections and other unintended content included in the photo.Ĭamera artifacts like lens distortions can theoretically be used to identify the particular camera being used. But you may add new metadata by taking the image. This is probably the safest way to remove any information from the original file. Take a photo of the screen (or partial screen). Even taking a partial screenshot may not be safe enough. Just make sure that you do not have anything sensitive displayed on the screen. This will likely just copy the "pixel representation" of the current image. Take a ScreenshotĪfter your image looks "right", take a screenshot of it. It can not hurt to review the final product using a simple text tool to see if you can spot meta data, but the data may not always be apparent. ![]() These additional features usually do not translate between different image formats. It will also create a new image based on the last version of the original image and remove edits or prior versions of the image. Converting an image will usually remove metadata (like "EXIF" data) from images or at least reduce it. But this may actually help the intent of removing additional information from the image. In particular, you may lose some of the details in the image if you convert it to a compressed format. One way to remove "undisplayed" information from images is to convert the image to another format (gif->png, or jpeg->gif). Here are some approaches to make image redaction safer. And of course there are "bugs" like what we had with the recent image issues. ![]() Or files retain older versions to allow users to "undo" edits. In some cases, image modifications are just appended to the original image file and overlayed as the image is displayed. This is not a new issue and has been a problem many times. Added compression, metadata, and other optimization features can make it difficult to remove information from images. While many image formats are still fundamentally "pixel" based, many have gone beyond simple "array of pixel" formats. The recent "acropalypse" vulnerabilities in Android and Windows 11 showed yet again the dangers of relying on image processing tools to redact images. ![]()
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