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I wouldn't use the word "corrected." The telescope uses filters to collect six ranges of infrared grayscale values. Each range is assigned a color (the highest wavelength is assigned red, the lowest wavelength is assigned blue, etc.) and these different colors are then combined to get a resultant "color" at each point in the image. The photos are nonetheless magnificent and JWT is a great engineering achievement. It shows what can be accomplished when people work together toward a common goal.