imagej MER basics - Page 5

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hortonheardawho


Posts: 3465

Reply: 81



PostPosted: April 23, 2012 10:54 AM 

sol 2787 ( Nov 26, 2011 ) EDF ( Extended Depth of Field ) 3D of some very fine lines:

Another example of imagej processing. Be sure to follow the location link back to the full EDF image which has links that lead to several animations of the intermediate steps in producing the EDF image.

dx


Posts: 1661

Reply: 82



PostPosted: April 23, 2012 4:38 PM 

3 colored compositions: 8-bit L257 Spirit Sol 561.

horton>>>I went to the Spirit site and saw your L images of your 76>>>MAN its more than likely the very best I've seen regardless if its a jpeg! If I were to frame a picture that would be it.

I chose images L2, L5 and L7 to see what could be produced...and I like what I see. Also using PSP X3 for a more detailed presentation.

Any comments?

yt
dx

hortonheardawho


Posts: 3465

Reply: 83



PostPosted: April 23, 2012 6:11 PM 

er, dx, the final product for the reply 76 image of Gusev ( and the panorama from whence it came ) is JPG format - but the source data was all original 12 bit data from the Analyst's notebook and all the processing up to the JPG conversion was 16 bit in imagej.

I can't say I like the PaintShop Pro versions of the L257 images. Have you given up on learning imagej?

dx


Posts: 1661

Reply: 84



PostPosted: April 23, 2012 10:46 PM 

horton...

Not at all. I did not produce the original jpegs in PSP, but imagej itself. I was not sure if any of the saved L images were going to do anything in PSP...just tried it out for image sake...no Biggee.

Just practicing picture size, downloading and uploading images from Flickr, especially what you gave as instructions on how to do it. This special to me. There are a very select group of MER photos to go through and they have to soak in as to what to do with them in imagej as I look at them. Working alone to select a group of images to work with, to me, is the tough part. But I like what I am doing so far with your help. I am going to reread your instructions from the first page and then try the 'macros' part...your 20, after all I am a non programmer! I will post the macro images when I get them done. Bear with me, please.

imagej is a fun tool that I am enjoying, for I work in several design programs completely different from imagej...there is NO comparison.

I did download and install the imagej plugin TurboReg, but have not tried it out yet. Reading the instructions on it last night brought me nowhere...seems like I have a stop when required to load an image to start it off. I go 3 steps forward then 11/2 back! But I'll get it with trial and error methods...how else to learn imagej.

There's a lot on my mind especially as an artist and designer in Architecture for you have given me a lot of new and strange stuff to work with and I want to get it in the correct order of thought, regardless what I think about Mars at this time, it's the image that counts. Want to build up a bit of experience and knowledge using imagej too and also to know what you are talking about in your notes about the image you produce and how you did it.

yt
dx


dx


Posts: 1661

Reply: 85



PostPosted: April 23, 2012 10:50 PM 

horton>>>

The bottom image in my 82 was imagej produced. The first and second are PSP produced.

yt
dx

hortonheardawho


Posts: 3465

Reply: 86



PostPosted: April 24, 2012 7:32 PM 

sol 2696 (Aug 25, 2011 ) 3D EDF MI of peculiar features on Tisdale rock on Cape York:

There seems to be a modest improvement in resolution over the JPG EDF, but the big improvement is the smoother rock textures.

By the way, I would love to colorize this image - but I can't find a pancam color image close enough to use to color it. Barsoomer?

Barsoomer


Posts: 344

Reply: 87



PostPosted: April 24, 2012 9:24 PM 

Somewhere in there, I think. The match is not perfect, but is the only one with that border, if the MI is in the same orientation as the pancam.

Context:


Serpens


Posts: xxx

Reply: 88



PostPosted: April 24, 2012 9:41 PM 

Hortonheardawho. My son first demonstrated NIH Image to me - mainly in support of a long standing argument at the time over his preference for Macs for med imaging and that led me to image J. Turbo Pascal was my favourite procedural language mid 80's so the Macro's are really comfortable. Just wanted to say that your intro for dx and Vincent etc has been brilliant and completely in accord with the NIH ethos with respect to the free distribution of the program.

dx


Posts: 1661

Reply: 89



PostPosted: April 24, 2012 11:35 PM 

horton>>>

I went to the 'Analyst's notebook' site and looked around the many pages...way too much info for me to digest. Does one need this site to establish good merging pics?

Thank you for showing and leading me into your world of the various sites you use for I never new they existed.

yt
dx

hortonheardawho


Posts: 3465

Reply: 90



PostPosted: April 26, 2012 7:48 AM 

Thanks Barsoomer!

Sol 2696 ( Aug 25, 2011 ) colorized HD format EDF (Extended Depth of Field ) closeup MI of Tisdale rock:

with location links.

I found a sol 2697 full filter pancam taken from the MI position BMLV ( follow the location links back to the pancam 3D ) but, unfortunately, part of the rock was obscured by the MI in the left eye view that I normally use to color the MIs - so I used the right eye view to colorize the image after correcting the right eye false color to the left eye false color. This is thus a corrected synthetic false color - so the colors mean nothing. I did a "natural" color version but who wants to see a dull mostly red picture?

This is as good as it gets. I used the original 12 bit data to process the images and combined 11 MI images and 7 pancam images for the final product.

Er, actually, there is one combination slightly better: If I add the 12th MI image used to create the 3D version THEN it is as good as it gets. But this is "good enough".

dx, the Analyst's Notebook is actually organized quite nicely. If all you want is the original data for Opportunity just jump to the the Opportunity search page, enter the sol range you are interested in and check the instruments ( cameras ) you want data for and click the "Search for Results" button.

The Search Results will be displayed as a list of thumbnails on the left. Click on one you want data for and a larger view will be displayed on the right - along with a "Download Product Files" list. Click on the "Floppy Disk" icon and save the file!

Once you have the data on your computer then you can use the imagej PDS Reader plugin to load each original image. Then the fun begins!

Just combining the images without contrast and brightness adjustments is not recommended. Play with the Image / Adjust / Brightness/Contrast command to see just what can be done.

Hope this helps.

Ben


Posts: 2270

Reply: 91



PostPosted: April 26, 2012 2:04 PM 

Hort; Great pictures of your mom's birthday.
Your #90 image suggests molten fragments of ejecta in a matrix of ash-like material.

Difficult to determine if it is very old volcanic or later impact ejecta. Confused

hortonheardawho


Posts: 3465

Reply: 92



PostPosted: April 26, 2012 3:41 PM 

sol 2699 ( Aug 8, 2011 ) L7R4 of the sky near the sun:

Something new under the Martian sun.

While waiting for some new images from Oppy I noticed something strange: there is a recurring image program 2601 named pancam_tau_L78R48 - but I don't ever recall seeing such images at Exploratorium or the official MER site.

Sure enough, there are L7R4 thumbnail pairs which seem to be the sky near the sun. The policy at the Official MER site appears to be NOT to post thumbnails - but the thumbnails are available from the Analysts Notebook.

Aha, says I, perhaps an occasional cloud spotted with these images?

So here is what I believe is the world's first amateur sky color image from these almost daily sequences.

Sorry no clouds this time.

This image was created from the L7 and R4 4X fourth root brightness stretched images registered by moving the left image 33 pixels to the right of the R4 image.

The color map is ( R,G,B ) = ( R4, avg(L7, R4), L7 ).


LWS


Posts: 3062

Reply: 93



PostPosted: April 26, 2012 10:31 PM 

DX; I love those composite images at reply #82. Great art!

Winston

dx


Posts: 1661

Reply: 94



PostPosted: April 27, 2012 12:44 AM 

horton>>>

Thank you for your 90 comments...and its a beautiful image you have produced. 11 MI images and 7 pancam images-brilliant work.

LWS>>>

Thank you. Its my first attempt using an image editor.

yt
dx

dx


Posts: 1661

Reply: 95



PostPosted: April 27, 2012 2:57 AM 

horton>>>

I merged RGB L3567 Sol2925 OPPY in imagej. Do these 'L' images contain the 'G' already in them? Or do you have to perform the formula you gave to create the 'G' when only 2 images are available or used?

Should or could I have used only 2 'L' images with your formula to get the same image results?

yt
dx


dx


Posts: 1661

Reply: 96



PostPosted: April 30, 2012 1:42 AM 

Sol 2020 Oppy

horton>>>

My first imagej change from RGB to 8-bit then stack with color merge-R2,AVG[R1,R2]R1-thought about that change of image type and it worked great...trying out most of the imagej commands on these images.

Are there some images that can not be colorized?

yt
dx


hortonheardawho


Posts: 3465

Reply: 97



PostPosted: April 30, 2012 7:33 AM 

Good job dx.

As long as there are images with two different spectral responses ( "filters" ) then you can create some sort of color map.

They don't even have to be from the same camera - as long as the images can be reasonably registered. I have combined, for instance, a Navcam image with a single pancam image ( usually an L6 or L7 ) to create a "color" image.( Here is an example. ) You can do this because the navcam has a permanent "red" filter.

One combination I haven't yet tried is an pancam L1 ( "no filter" ) and a Navcam L0 ( "red" filter ). But the need has never arisen. Most likely the most "natural" map would be something like:

( R,G,B ) = ( L0, aL1, L1-bL0 )

where the weighting factors a and b would be determined by trial and error.

In general, given registered filters f1,,,fn the color map can be of the form:

( R,G,B) = ( Fr(f1,,,fn), Fg(f1,,,fn), Fb(f1,,,fn) )

where Fr, Fg, Fb are n variable functions.

Even the simplest case of two filters combined linearly is a six dimensional problem:

(R,G,B)=( a1*f1+a2+f2, a3*f1+a4*f2, a5*f1+a6*f2 )

Er, exactly which point in this 6 dimensional space would correspond to "true" color?

JPL will, of course, tell you they know exactly which point that is.

Free your mind and search the color space for interesting combinations.

hortonheardawho


Posts: 3465

Reply: 98



PostPosted: April 30, 2012 9:23 PM 

sol 2914 L12 synthetic color comparison to L257 false color:

The bear shes'a dance.

dx


Posts: 1661

Reply: 99



PostPosted: May 1, 2012 9:18 AM 

horton>>>

Found the buttons to make side by sides and 2x2 images. Completely different than PSP. Got to have the correct images open-scary when they pop in their place-almost unexpectedly. Edit> 'Undo' is a bit flimsy-in some commands it works and others it doesn't...so you have to know what image you want to remain open for the next imageJ challenge.

Thanks for your comments in 97...V.M.appreciated.

Question!
I want to try out the 'macro' sequence and it seems that I have to try out the order first, write it down the way you want the images, remove them from the screen, open imageJ, open macros-then RUN? as I make the movements to merge the images as it mimics my movements of selections. Is this about right?

yt
dx

dx


Posts: 1661

Reply: 100



PostPosted: May 1, 2012 3:16 PM 

Oppy Sol 2420-comparison of imageJ tools

yt
dx

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