Practice question · True or false
A Bayer colour filter array carries twice as many green filters as red or blue.
Hints
- The proportions are one half, one quarter, one quarter.
- Human vision takes most of its luminance detail from the green region.
Show the answer
True
Why
True. Half the filters are green, a quarter red and a quarter blue. The asymmetry follows the eye: most of our perception of fine detail comes from the green part of the spectrum, so sampling it twice as densely buys resolution where the viewer will actually notice it.
Practise Digital Capture and the Input-Output Chain
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