Complete the account of digital capture.
The mosaic of coloured filters over a sensor is the ______ array, in which half the filters are green. Reconstructing three colours for every pixel from one measurement each is called ______. Raw data is ______, so twice the light gives twice the number. A print held in the hand is normally made at about ______ pixels per inch.
Word bank: Bayer · demosaicing · linear · 300 · Foveon · 72
Hints
- The third blank explains why the brightest stop holds half the levels.
- The last blank is a printing convention, not a property of any file.
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The mosaic of coloured filters over a sensor is the Bayer array, in which half the filters are green. Reconstructing three colours for every pixel from one measurement each is called demosaicing. Raw data is linear, so twice the light gives twice the number. A print held in the hand is normally made at about 300 pixels per inch.
The third blank is the one with consequences. Linear encoding means the levels are distributed by light rather than by appearance, so the shadows, where the eye is most sensitive to banding, are described by the fewest numbers, which is the entire argument for exposing to the right.
Practise Digital Capture and the Input-Output Chain
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