| Description: | When attempting to summarize a data cube in one image, it is important that features in the data have corresponding features in the image that look natural. We may as well attempt to make the image look beautiful. One interesting option is to mimic the response of the human eye. Each of the three cone types in the human eye is sensitive to a large fraction of the spectrum, overlapping with the other cones. The advantage over simply cutting the data set in three and assigning red, green, and blue to these parts, is that smooth gradients in the data will correspond to smooth gradients in the output image. Futhermore, the false colour image seems to look rather "natural". The image shown is created from a Faraday rotation measure cube recorded with the WSRT LFFEs by Gianni Bernardi. Emission at low (negative) Faraday depth is in the blue part, and emission at high (positive) Faraday depth is in the red part. Note the colours in some of the point sources and the blue blob of emission "in front" of the rest of the emission. |
