At 19:55:27 UTC the Mastcam Right shot again this suggestive hillock of stratified rocks with a beautiful blue sky for background (see https://www.facebook.com/PianetaMarte.MdM/photos/a.1625578140858706/2291028767646970/).
Compared to the previous image of six days before, the shot is closer and you can see some differences in the color of the rocks while the sky remained the same.
Many differences in color and brightness are surely due to the different illumination of the two photos, since the photo of six days before was taken in the late afternoon while this photo was taken around noon local time.
In any case, not all color differences are attributable to different lighting, some may also represent physical-chemical alterations of the ground itself, alterations also observed in some Opportunity shots (see https://www.facebook.com/PianetaMarte.MdM/videos/1668518819897971/).
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.
Original image: https://mars.nasa.gov/msl-raw-images/msss/02464/mcam/2464MR0130760281004092C00_DXXX.jpg
This post has been automatically translated. See the original post here.