InSight Surface Operations, 26 Nov 2018- 21 Dec 2022 |
InSight Surface Operations, 26 Nov 2018- 21 Dec 2022 |
Nov 26 2018, 08:20 PM
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#1
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Merciless Robot Group: Admin Posts: 8785 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
Congratulations to the InSight team on a successful landing! We'll discuss the remainder of the mission here.
-------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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May 4 2019, 06:09 PM
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#2
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Senior Member Group: Members Posts: 4256 Joined: 17-January 05 Member No.: 152 |
Thanks for that reference. I can imagine that a matrix to sRGB would have to work hard to discriminate some colours. Still, the test chart images (Fig 8) seem to show that the sRGB conversion works well. Maybe being in a high S/N lab situation helps.
This makes me wonder what has been done to the public pngs. Perhaps just a white balance but no sRGB conversion? The public png colours look not bad, but I guess being in a nearly monochromatic environment helps! The flags and green and blue dots on the calibration target do look fairly desaturated, eg in this sol 10 image: https://mars.nasa.gov/insight-raw-images/su...0004_0010M_.PNG That's what you'd expect for an image before transforming to sRGB. |
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May 6 2019, 01:17 AM
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#3
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Senior Member Group: Members Posts: 2542 Joined: 13-September 05 Member No.: 497 |
Maybe being in a high S/N lab situation helps. Signal levels in the lab are typically much lower than under solar illumination because it's hard to get sunlight in a lab. The MER-heritage CCD has very low QE in the blue so the Bayer pattern needs a lot of boosting in the blue. I'm not sure what issue you're actually reacting to. -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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May 6 2019, 03:34 PM
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#4
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Senior Member Group: Members Posts: 4256 Joined: 17-January 05 Member No.: 152 |
I'm not sure what issue you're actually reacting to. My original comment was about the recent press release cloud and sunrise/set animations, especially for the ICC. This is a frame from that animation, for which the caption reads "This color-corrected version more accurately shows the image as the human eye would see it": It's hard to believe such saturated purples and cyans are accurate, given all the previous imaging of the sky, so my original comment was that perhaps they meant to say "false colour". As Deimos suggested, maybe instead large errors were introduced in the matrix conversion to sRGB, since that matrix will have to amplify small differences between G and B channels due to their similar spectral responses. |
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