IPB
X   Site Message
(Message will auto close in 2 seconds)

Welcome Guest ( Log In | Register )

Png Versus Jpeg Image Quality, When generated from a JPEG orginal
Tman
post May 14 2005, 06:33 PM
Post #1


Member
***

Group: Members
Posts: 877
Joined: 7-March 05
From: Switzerland
Member No.: 186
QUOTE (NIX @ May 14 2005, 12:01 AM)
Here's an L257 view of Jibsheet. AwalkonMars Still working on the MI mosaic though... blink.gif
Nirgal, the difference in resolution is indeed an issue but overlapping the images can be a real pain..
Nico
*

Hi Nico, I just enjoyed your full resolution PNG of east Methuselah (or Jibsheet cool.gif ). Exquisite such full resolution!
In respect of the size of 25MB I wonder about you generated a PNG-file of it. The orginal pics were sure JPEG - they must be JPEG smile.gif Are you sure there would be a visible difference in comparison to a high JPEG version?

Note: For the responses in this issue it was opened a new thread in "Imagery & Tech Issues": http://www.unmannedspaceflight.com/index.php?showtopic=1001

This post has been edited by Tman: May 16 2005, 07:55 PM


--------------------
Peter
MER filename decoding into local true solar time - MSL clock and filename decoding
Go to the top of the page
 
+Quote Post
 
 Start new topic
Replies
Nix
post May 14 2005, 11:33 PM
Post #2


Chief Assistant
****

Group: Admin
Posts: 1409
Joined: 5-January 05
From: Ierapetra, Greece
Member No.: 136
I think .png is better. Have not tested that extensively though. Anyone? Originals of course .jpg. I'm just used to convert fullres and 50% to .png and thumbnails to .jpg
There's some awesome stereo's in that pan too btw biggrin.gif
Nico


--------------------
photographer, space imagery enthusiast, proud father and partner, and geek.


http://500px.com/sacred-photons &
Go to the top of the page
 
+Quote Post
djellison
post May 15 2005, 09:21 AM
Post #3


Founder
****

Group: Chairman
Posts: 14457
Joined: 8-February 04
Member No.: 1
Oh of course, you always keep a copy in PNG/PSD or whatever format 'at home' as it were - but I only ever 'publish' online with a JPG - just because memories of 56k are not THAT distant smile.gif

Doug
Go to the top of the page
 
+Quote Post

Posts in this topic

« Next Oldest · Tech, General and Imagery · Next Newest »
 

Reply to this topicStart new topic

 

Display Mode: Switch to: Standard · Switch to: Linear+ · Outline

Track this topic · Email this topic · Print this topic · Subscribe to this forum

RSS Lo-Fi Version Time is now: 17th December 2024 - 06:19 AM
Powered By IP.Board © 2024  IPS, Inc.
RULES AND GUIDELINES
Please read the Forum Rules and Guidelines before posting.

IMAGE COPYRIGHT
Images posted on UnmannedSpaceflight.com may be copyrighted. Do not reproduce without permission. Read here for further information on space images and 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.