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At 22:17:38 UTC the Mastcam Left shot again the inner rim of the Gale crater, framing the same direction and roughly at the same local time of the picture of two days ago (see
Comparing the two images, some very interesting differences immediately jump to the eye!
Compared to the previous photo, the crater rim appears much clearer and more defined, while the sky appears even more milky.
Not bad for an atmosphere that many consider to be almost non-existent!
The original image is a black and white encoding of the Bayer mask that has been converted to color through a process called “debayering” or “demosaicing”. In addition, the photo has undergone noise reduction due to Jpeg compression, white balance and a slight increase in microcontrast and color saturation in order to make the colors more similar to what the human eye would see.

Original image:

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