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Left Vs Right, different resolution/compression MER jpg |
 Aug 18 2005, 05:27 PM
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 Senior Member  Group: Members Posts: 2492 Joined: 15-January 05 From: center Italy Member No.: 150  |
Left/right pairs from both rovers and both sources (JPL and Exploratoriun) shows a systematic difference of jpeg files dimension in favour of right version (tipically 5% on NavCam/PanCam pairs). See example.
Moreover, you If you look carefully to images, you will find, there is a clear difference in terms of fine details:
I do not know if this strange issue is due to different jpeg compression ratio on the server or is more serious (lens difference? extremely improbable!). Other explainations??? (Maybe people often dowloading .img uncompressed images can answer...  )I noticed this from the very first Sols, but apparently no one highlighted it here and most people continue to use left images to make stitch or other considerations... viceversa, I reccomend to use always right version, when possible!!! -------------------- I always think before posting! - Marco -
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Aug 2 2006, 11:55 AM
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Founder Group: Chairman Posts: 14457 Joined: 8-February 04 Member No.: 1 |
Is the same true of the RAD's out of the PDS?
Might be interesting to do a comparison of the JPG, and then all the various PDS products, for left and right of one observation. Doug |
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dilo Left Vs Right Aug 18 2005, 05:27 PM
helvick I never noticed it myself but you might find somet... Aug 18 2005, 08:51 PM
dilo Thanks, helvick, very interesting articles!
(... Aug 18 2005, 09:18 PM slinted The compression used onboard the rover might expla... Aug 18 2005, 09:31 PM dilo Based on reactions in another thread, I realized t... Aug 2 2006, 09:45 AM fredk QUOTE (dilo @ Aug 2 2006, 09:45 AM) The l... Aug 3 2006, 02:32 AM Analyst I am no image expert, so take this a pure guess.
... Aug 2 2006, 12:31 PM dilo I think Analyst's explaination is very plausib... Aug 2 2006, 02:43 PM djellison I've emailed JB. Navcam's not his dept - b... Aug 2 2006, 12:37 PM MahFL I have always noticed the right cam images are bet... Aug 2 2006, 02:02 PM Bill Harris I'm embarrassed. I've never noticed this,... Aug 2 2006, 02:25 PM mhoward I think there is a pretty simple reason why people... Aug 2 2006, 02:28 PM Analyst Thanks dilo. I always thought the empty "filt... Aug 2 2006, 05:47 PM dilo Analyst, in my knowdlege, the R1 is a narrow-ban b... Aug 2 2006, 07:52 PM djellison L7 and R1 are the deep blue / violet that has exce... Aug 2 2006, 08:30 PM fredk Well, even though I started this resurgence in the... Aug 3 2006, 02:56 AM dilo Excellent work, fredk. Really!
Looking to imag... Aug 3 2006, 07:53 AM Bill Harris QUOTE It appears that there's something about ... Aug 3 2006, 12:50 PM CosmicRocker I'm glad this left/right thing was mentioned. ... Aug 6 2006, 07:41 PM |
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