My Assistant
Dust Devil Image Enhancement, Making your own Images like JPL |
May 10 2005, 08:48 AM
Post
#1
|
|
![]() Member ![]() ![]() ![]() Group: Members Posts: 118 Joined: 14-March 05 Member No.: 195 |
OK I posted questions in the live dust devil topic and didn't get much response.
I have now done some tries at enhancements but I am not a Photoshop wizard. I am getting close to the enhancements that JPL does but something is missing. My images turn out grainy when I tweak the contrast. Here is the process. 1. select 2 images that are the same view, size and filter. (preferably one with dd and one without.) 2. invert (negative) one of the images. 3. select all on the inverted image 4. paste to the other non inverted image 5. decrease the opacity of the inverted image layer to 50% 6. merge visible 7. increase contrast (this is where things are going not quite right) you now have an image that is only what has changed between images. (like dust devils or such) Now you can take the image and place it back over the original to enhance the dust devil. I would really appreciate it if somebody more adept at modifying images could tell me what I'm doing wrong and why my images don't look like jpl's. thanks Wish I had more time to do this with all the frames and build a movie. My earth rocks are getting in the way of my mars rocks *sigh* Here are my attempts. One raw and another running it through a filter or two before combinding with the original. ![]() ![]() scott |
|
|
|
wyogold Dust Devil Image Enhancement May 10 2005, 08:48 AM
Pertinax Just a quick thought: I suspect that when using t... May 10 2005, 01:37 PM
djellison They also lack to flatfield/dark frame processing ... May 10 2005, 02:17 PM
wyogold QUOTE (djellison @ May 10 2005, 02:17 PM)They... May 10 2005, 11:53 PM
Charlie The jpeg noise is an issue, but I like this method... May 30 2005, 04:56 PM
jaredGalen I was hoping MichaelT might be able to pop in here... Jun 10 2005, 01:39 PM
MichaelT Yes, I'm around
These artifacts could be due... Jun 10 2005, 02:39 PM
jaredGalen Thanks for taking the time to reply.
Straight away... Jun 10 2005, 10:30 PM
jaredGalen Well, here's my latest attempt.
Much happier ... Jun 12 2005, 10:09 PM
jaredGalen Implemented that bit now, made no difference at al... Jun 12 2005, 10:33 PM
jaredGalen I have put the JAVA implementation of MichaelT alg... Jun 18 2005, 12:40 AM
jaredGalen Oh, and you can set the Enhancement factor to anyt... Jun 18 2005, 08:50 AM
wyogold QUOTE (jaredGalen @ Jun 18 2005, 08:50 AM)Oh,... Jun 20 2005, 05:07 AM![]() ![]() |
|
Lo-Fi Version | Time is now: 17th December 2024 - 06:18 AM |
|
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. |
|