![]() Doing it outside the camera allows using more sophisticated algorithms, which yield better images. ![]() As mentioned above, the RAW conversion is quite complex. What’s the point of saving data that still needs to be processed, rather than ready-to-view JPEG files? There are two reasons. In some way, RAW images can be compared to the negatives of analog photography: they contain all the information that was captured when taking the photo, but more processing is needed to see the final picture. Shooting RAW images means saving the unprocessed data, directly out of the sensor, either in addition to or in place of the processed image. The unprocessed data is called “RAW data” and the processing is called “RAW conversion”. A lot of sophisticated digital image processing is required to transform the signals that the sensor measures at each photosite into a beautiful color image. Recap the basics: RAW conversion, linearity and DNG filesįirst, what’s a RAW image? To understand that, we first must note that the image sensor in your camera does not “see” the image as it is displayed on the screen or saved in the JPEG file.
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