![]() ![]() The embedded JPEG image discussed here is stored within the raw file even in just "RAW" mode! When you open raw files in other software, what you are usually seeing is not the raw data, but the embedded, processed JPEG image! Examples of software which are either incapable of or which in their default settings do not show you the real raw data: IrfanView, XnView, Gwenview, Geeqie, Eye of GNOME, F-Spot, Shotwell, gThumb, etc. Most cameras offer storing photos in one of three modes: "RAW", "JPEG", or "RAW+JPEG". Some raw files contain as many as three JPEG images differing only in resolution. When shooting a raw photo, most cameras embed within the raw file a full-resolution JPEG image with tone curves and other adjustments applied.When your camera (or other raw editing software) processes the raw file it compensates for this by increasing exposure compensation by the same amount. Most cameras also underexpose every photo you take by anywhere from -0.3EV to -1.3EV or more, in order to gain headroom in the highlights. Some cameras, particularly low-end ones and Micro Four-Thirds system, may also apply lens distortion correction to not only fix barrel and pincushion distortion but also to hide dark corners caused by severe vignetting or by the lens hood. ![]() Exactly what gets applied depends on the choices made by your camera's engineers and company management, but usually this includes a custom tone curve, saturation boost, sharpening and noise reduction. Even if you set all the processing features which your camera's firmware allows you to tweak to their neutral, "0" positions, what you see is still not an unprocessed image. It processes the raw image in many ways before presenting you with the histogram and the preview on your camera's display.
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