Both Canon G15 and Nikon P7800 have 1/1.7-inch sized 12.0 MP resolution sensors so sensor size and resolution is not a differentiator between these two cameras.
Below you can see the G15 and P7800 sensor size comparison.
Canon G15 and Nikon P7800 have the same sensor sizes so they will provide same level of control over the depth of field when used with same focal length and aperture.
DxOMark Sensor Scores
DxOMark is a benchmark that scientifically assesses image quality of camera sensors. It scores camera sensors for color depth (DXO Portrait), dynamic range (DXO Landscape) and low-light sensitivity (DXO Sports), and also gives them an overall score. Canon G15 and Nikon P7800 sensors have been tested by DxO and the results show that P7800 has a better overall score of 54, 8 points higher compared to G15's score of 46.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Canon G15 |
46 |
19.9 bits |
11.5 Evs |
165 ISO |
Nikon P7800 |
54 |
21.2 bits |
11.7 Evs |
200 ISO |