The source data covers the lunar globe from 70°N to 70°S. Small data dropouts near the top and bottom were inpainted using Photoshop's content-aware spot healing brush. The intensity range (0.16, 0.4) was mapped into the full (0, 255) 8-bit range per channel. A gamma of 2.8 was applied (the LROC data is linear), and the channels were multiplied by (0.935, 1.005, 1.04) to balance the color.
The red channel contains the 643 nm band, while green and blue were created from different linear combinations of the 566 and 415 nm bands to more nearly center them on 532 nm (green) and 472 nm (blue). A less formal introduction to the process is in this LROC blog post and in this one.įor the color map here, the visualizer modified and combined three of the seven wavelength bands of the LROC color data to more closely match what the human eye sees. The readme file provides a technical summary of how the mosaic was constructed along with references to more detailed publications. The color map was adapted from the Hapke Normalized WAC Mosaic, a composite built by the camera team from over 100,000 WAC (Wide Angle Camera) images.
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