The imaging experts behind the gorgeous photos from the Webb telescope explain how they bring them to life.
released a fascinating new video this week that explains how Space Telescope Science Institute science visuals developers Joe DePasquale and Alyssa Pagan transform Webb’s black-and-white image data into full-color composites.explain how DePasquale and Pagan download images from Webb’s cameras, stretch and rescale images, remove artifacts, and precisely apply color to each layer of the picture.
The colors that people see in Webb’s images are built using chromatic ordering. This is the process of assigning the order of wavelengths of light that humans can observe to Webb’s images, which are captured in infrared light that people cannot see. For example, within visible light, shorter wavelengths are bluer and longer wavelengths are redder, so people like DePasquale and Pagan assign corresponding colors to the shortest and longest wavelengths of infrared light detected by Webb.
However, that is not the end of the story for each image. Photos are edited further for visual appeal and to ensure that the scientific messaging of each image is realistically shown. Much like typical photographers want their images to look as good as possible, that is also true for DePasquale and Pagan.
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