We shoot a specially designed chart in carefully controlled conditions and the resulting images are analysed using the DXO Analyzer software to generate the data for the graphs below.
For more more details on how to interpret our test data, check out our full explanation of our noise and dynamic range tests.
JPEG signal to noise ratio
A high signal to noise ratio (SNR) indicates a cleaner and better quality image.
Raw signal to noise ratio
Raw images (after conversion to TIFF) from the Fujifilm X10 have a better signal to noise ratio than the Canon PowerShot G12. Meanwhile, the Nikon Coolpix P7100 just beats the Fujifilm X10 from a sensitivity of ISO 800 upwards, but the difference in scores is exceptionally small.
The benefit of the Fuji X100's APS-C sized sensor comes to bear here as its raw files produce a cleaner signal than the other cameras.
JPEG dynamic range
This chart shows that the Fujifilm X10's JPEGs capture a wide tonal range up to a sensitivity of ISO 1600, at higher sensitivities some of the tonal range in the shadows and highlights will be lost.
Raw dynamic range
This chart indicates that the Fujifilm X10's raw images (after conversion to TIFF) capture a wide tonal range across the sensitivity range, comfortably out performing both the Canon PowerShot G12 and Nikon Coolpix P7100. As we would expect given its larger sensor size, the Fujifilm X100 manages to outperform the Fujifilm X10's dynamic range performance.
Our analysis shows that all four cameras produce good results, but the X10's raw files (after conversion to TIFF) are on par for signal to noise ratio with the Canon PowerShot G12 and Nikon Coolpix P7100.
When it comes to dynamic range, however, the raw file (after conversion to TIFF) results show that the Fujifilm X10 is capable of capturing a greater tonal range than both the Canon PowerShot G12 and Nikon Coolpix P7100.