Phobos |
Phobos |
Guest_Sunspot_* |
![]()
Post
#1
|
Guests ![]() |
http://www.esa.int/SPECIALS/Mars_Express/
These images, taken by the High Resolution Stereo Camera (HRSC) on board ESA’s Mars Express spacecraft, are Europe’s highest-resolution pictures so far of the Martian moon Phobos. http://www.esa.int/SPECIALS/Mars_Express/SEM21TVJD1E_0.html |
|
|
![]() |
![]()
Post
#2
|
|
Founder ![]() ![]() ![]() ![]() Group: Chairman Posts: 14434 Joined: 8-February 04 Member No.: 1 ![]() |
HRSC itself is great, but the super resolution bolt-on camera from which those two frames came from has never achieved good focus.
Doug |
|
|
![]()
Post
#3
|
||||
![]() Member ![]() ![]() ![]() Group: Members Posts: 656 Joined: 20-April 05 From: League City, Texas Member No.: 285 ![]() |
...has never achieved good focus. I tried running Helicon Focus software on a few images. Looks like a combination of motion smear + out of focus, but the dominant effect seems to be motion smear. Due to the jpeg artifacts it's a little difficult to do a good job of this, but here are some images with the motion smear (somewhat) corrected. I think that if I had uncompressed versions of the images then I could pull quite a bit of fine detail from them. |
|||
|
||||
![]()
Post
#4
|
|
![]() Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 ![]() |
I don't think it's motion smear, more like noncircular PSF due to out of focus deformity in some part of the optics. It gives an appearance of vertical motion smear. It would probably be possible to do a proper deconvolution if we knew the PSF exactly (say by imaging a star), but as I recall the amount of defocus isn't constant either.
-------------------- |
|
|
![]()
Post
#5
|
|
![]() Member ![]() ![]() ![]() Group: Members Posts: 656 Joined: 20-April 05 From: League City, Texas Member No.: 285 ![]() |
|
|
|
![]() ![]() |
![]() |
Lo-Fi Version | Time is now: 24th September 2024 - 08:04 PM |
RULES AND GUIDELINES Please read the Forum Rules and Guidelines before posting. IMAGE COPYRIGHT |
OPINIONS AND MODERATION Opinions expressed on UnmannedSpaceflight.com are those of the individual posters and do not necessarily reflect the opinions of UnmannedSpaceflight.com or The Planetary Society. The all-volunteer UnmannedSpaceflight.com moderation team is wholly independent of The Planetary Society. The Planetary Society has no influence over decisions made by the UnmannedSpaceflight.com moderators. |
SUPPORT THE FORUM Unmannedspaceflight.com is funded by the Planetary Society. Please consider supporting our work and many other projects by donating to the Society or becoming a member. |
![]() |