We shoot a specially designed chart in carefully controlled conditions and the resulting images are analysed using DXO Analyzer software to generate the data to produce the graphs below.
A high signal to noise ratio (SNR) indicates a cleaner and better quality image.
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
JPEG images from the Canon IXUS 125 HS compare closely with the Nikon Coolpix S8200 and although the Nikon does just have the edge the visual difference in noise levels between the two will be minimal.
JPEG dynamic range
This chart shows that the Canon IXUS 125 HS again compares closely to the Nikon Coolpix S8200, with the S8200 just having the lead at the lower sensitivities, but at the higher end of the sensitivity scale the IXUS 125 HS shows better handling of noise in low light conditions.