Objective measurements of RAW images are an essential basis for any analysis of digital cameras, but such measurements were neither possible nor available until now. DxO Labs has developed a new scale for digital camera image quality performance, called DxOMark Sensor, to serve as an additional tool to help photographers rank and compare digital cameras.
This scale is based on three underlying metrics, Color Depth, Dynamic Range and Low-Light ISO, each one tied to a real-life photographic scenario: landscape, studio & portrait, and photojournalism & sport.


http://www.dxomark.com/index.php/eng/DxOMark-Sensor