These graphs were produced using data generated by DXO Analyzer.
We shoot a specially designed chart in carefully controlled conditions and the resulting images are analysed using the DXO software.
Signal to noise ratio
A high signal to noise ratio (SNR) indicates a cleaner and better quality image.
JPEG images from the Nikon Coolpix S9100 produce a good signal to noise ratio when compared with the Panasonic Lumix DMC-TZ20, Canon IXUS 220 HS and Fujifilm Finepix 550 EXR, beating all but the Canon IXUS 220 HS at ISO 800.
This chart indicates that the Nikon Coolpix S9100's JPEGs have a at least a 0.5EV lower dynamic range than the comparison cameras up to a sensitivity of ISO 800.