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Subject:colour representation of values, how to describe? From:John Cornellier <tw -at- cornellier -dot- com> To:"TECHWR-L" <techwr-l -at- lists -dot- raycomm -dot- com> Date:Mon, 08 Apr 2002 11:57:56 +0200
In photography, if an image has a wide range of light and dark values, it is said to have high contrast. Increasing
the value scale increases the contrast.
This might be done to improve the resolution of detail.
Say we have a 2D image which represents 3D data, like a topographic map. Data in the horozontal plane is represented
on the XY axises. Vertical data is represented in the Z axis by a colour gamut. If, in a similar way to that
described above, we want to increase the apparent resolution of the vertical data, we can spread, or "map" the z
access to a wider range of, or more, colours.
What would be the technical term for doing so? Something like increasing vertical contrast? Increased data
granularity?
Anybody working in data representation using colour have a term for this?
John Cornellier
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