Dynamic range and file formats
Posted Mar 30, 2007 13:06 UTC (Fri) by corbet
In reply to: Dynamic range and file formats
Parent article: Working with raw images on Linux
I think we disagree slightly about what "dynamic range" means. It's not the difference between the upper and lower ends, instead, it's the ratio between the highest value and the smallest possible change you can represent. If you take 12-bit output from your sensor and cram it into an 8-bit file format (compressed or not) you've lost dynamic range.
In other words, the "more data between the top and bottom of the dynamic range" you mention is the dynamic range. It's what lets you record a bit more information about what's in the shadows without overexposing the image as a whole.
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