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.
This chart shows a big improvement in signal to noise ratio results over the Canon PowerShot D10, and although beaten by the Olympus TG-810 these results show that noise is aceptable across the entire sensitivity range
These results show that the Canon PowerShot D20 has a consistantly good dynamic range from a sensitivity of ISO 100 to 3200, although there is a big drop at ISO 6400. However, compared with the Canon PowerShot D10, there is a big improvement.