IPB

Welcome Guest ( Log In | Register )

9 Pages V  < 1 2 3 4 > »   
Reply to this topicStart new topic
IMG2PNG, PDS/FITS to PNG conversion
siravan
post Dec 13 2009, 05:28 AM
Post #16


Member
***

Group: Members
Posts: 128
Joined: 10-December 06
From: Atlanta
Member No.: 1472



The first image is the middle portion of the data in calibrated 16-bit gray scale (0=-366 m, 65535=+1794 m above the datum; 1/10 scaling). The second image is 8-bit contrast enhanced to bring out the features.
Attached thumbnail(s)
Attached Image
Attached Image
 
Go to the top of the page
 
+Quote Post
djellison
post Dec 20 2009, 02:31 PM
Post #17


Founder
****

Group: Chairman
Posts: 14431
Joined: 8-February 04
Member No.: 1



FWIW - Using ISIS3 I've now got these converting fine. PDS2ISIS, ISIS2RAW, then import to Photoshop as mentioned in the HiRISE DEM thread.
Go to the top of the page
 
+Quote Post
knight
post Jan 21 2010, 09:46 PM
Post #18


Newbie
*

Group: Members
Posts: 3
Joined: 21-January 10
Member No.: 5182



QUOTE (siravan @ Dec 12 2009, 03:19 AM) *
I've written a utility program fitsfromimg32.exe, which converts 32 bits IMG files to FITS format. It seems to be doing a good job on these files. If anyone is interested, please send me a message, so that I can email the exe file or the C++ source files.



I was wondering if the 32 bit version of this is now available or if your fitsfromimg32 can be downloaded anywhere.

Cheers.
Ali.
Go to the top of the page
 
+Quote Post
knight
post Jan 21 2010, 10:34 PM
Post #19


Newbie
*

Group: Members
Posts: 3
Joined: 21-January 10
Member No.: 5182



QUOTE (Bjorn Jonsson @ Jun 7 2009, 01:53 AM) *
I just uploaded a new version of IMG2PNG. This version is important for those of you that use it to calibrate Cassini images as I corrected a nasty bug that resulted in incorrect brightness of the images. For example, this manifested itself in blue images that became too dark relative to the red and green ones. This messed up RGB composites.

There are no changes that affect images from other spacecraft.

As before this can be downloaded at http://www.mmedia.is/bjj/utils/img2png



Hi there I am pretty new to this so excuse me if this is a bad observation.
I've noticed that the img2png only works with one of the IMG files I downloaded from the Mars DEM site at HiRise. with further investigation the only difference I found was that the Min and Max values for all the other (non working) IMG files were :
VALID_MINIMUM = -1954.39
VALID_MAXIMUM = -1833.56
in the negative range. and always resulted in a black .png file. (got this info from a pds2jpg converter I found which makes the 8 bit conversion.

The only IMG file that converted successfully had a positive min and max value :
VALID_MINIMUM = 782.07
VALID_MAXIMUM = 1300.01
I've tried using the -s option to multiply by a negatice number or the -ctcal_dep.txt to set up a file with the correct ranges but I get nothing.
my cal_dep.txt file is just :
-1954 -1800
(as I understood it it should only have one entry per file)

if I am getting any of this wrong I appologise and would appreciate any guidance in converting these files.

my aim is to convert the files into hieghtmaps and eventually to 3d models in a standard 3d format.

Cheers.
~a

Go to the top of the page
 
+Quote Post
Bjorn Jonsson
post Jan 25 2010, 12:14 AM
Post #20


IMG to PNG GOD
****

Group: Moderator
Posts: 2250
Joined: 19-February 04
From: Near fire and ice
Member No.: 38



I have now fixed the bug mentioned by knight (and by Doug several weeks ago - it's the same bug). IMG2PNG now correctly converts the HIRISE DEMs. Actually it should correctly convert all files containing 32 bit floating point data if the files also contain information on the valid minimum and valid maximum data values or if that information is in a detached label.

As before this can be downloaded at http://www.mmedia.is/bjj/utils/img2png
Go to the top of the page
 
+Quote Post
knight
post Jan 25 2010, 12:26 AM
Post #21


Newbie
*

Group: Members
Posts: 3
Joined: 21-January 10
Member No.: 5182



Awesome !

Thanks Bjorn, I will test this when I get to work !

Cheers,
~a
Go to the top of the page
 
+Quote Post
Bjorn Jonsson
post Jan 26 2010, 12:59 AM
Post #22


IMG to PNG GOD
****

Group: Moderator
Posts: 2250
Joined: 19-February 04
From: Near fire and ice
Member No.: 38



I just made another new version of IMG2PNG, this time to correctly handle the MGS MOLA files. For the conversion to work, the label files (.LBL) must be downloaded in addition to the image files (.IMG) since the image files contain no header. When converting, the constant 8208 is added to the data to get rid of negative values.

EDIT: Currently IMG2PNG may only work for the MOLA topographic data (the megt*.img files) - I still haven't tested other 'types' of MOLA data. However, that's the data that should be most interesting. I'll do a new version that should work for more MOLA files in a week or two.
Go to the top of the page
 
+Quote Post
elakdawalla
post Jan 26 2010, 02:19 AM
Post #23


Administrator
****

Group: Admin
Posts: 5172
Joined: 4-August 05
From: Pasadena, CA, USA, Earth
Member No.: 454



Although the gridded topographic data is indeed likely the most interesting for folks interested in digital terrain maps, I just want to speak up for the PEDRs. I don't think very many people appreciate how much better the along-track resolution of the MOLA data is than it is represented in the gridded data. Anybody who's seriously using MOLA data to understand the shape of a Martian feature is missing the boat if they do not use the PEDRs as topographic cross-sections.

However, we don't need IMG2PNG to read PEDRs; they're best read as lat, lon, altitude triples in a table.


--------------------
My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
Go to the top of the page
 
+Quote Post
S_Walker
post Mar 15 2010, 04:24 PM
Post #24


Junior Member
**

Group: Members
Posts: 94
Joined: 15-October 09
Member No.: 4979



I can't seem to get IMG2PNG to work on my computer- downloaded the latest version, and I was hoping to explore some of the LROC data release. However, the exe file gets this error "This application has failed to start because cftisio.dll was not found. Re-installing the application may fix this problem." I kept the cftisio.dll file in the same folder. Any suggestions? Running on an XP system.

Go to the top of the page
 
+Quote Post
Bjorn Jonsson
post Mar 15 2010, 08:11 PM
Post #25


IMG to PNG GOD
****

Group: Moderator
Posts: 2250
Joined: 19-February 04
From: Near fire and ice
Member No.: 38



This is weird - IMG2PNG should work if cfitsio.dll is in the same directory as img2png.exe.

Putting cfitsio.dll into the directory where Windows resides (usually c:\windows) might fix the problem.
Go to the top of the page
 
+Quote Post
S_Walker
post Mar 16 2010, 12:02 PM
Post #26


Junior Member
**

Group: Members
Posts: 94
Joined: 15-October 09
Member No.: 4979



Nope, that didn't help at all... stupid windows!

QUOTE (Bjorn Jonsson @ Mar 15 2010, 04:11 PM) *
This is weird - IMG2PNG should work if cfitsio.dll is in the same directory as img2png.exe.

Putting cfitsio.dll into the directory where Windows resides (usually c:\windows) might fix the problem.

Go to the top of the page
 
+Quote Post
M@!
post Mar 16 2010, 11:03 PM
Post #27


Newbie
*

Group: Members
Posts: 4
Joined: 7-July 09
Member No.: 4857



Do you have local administrator rights on your workstation? Is it possible that you need to register the DLL?
Go to the top of the page
 
+Quote Post
S_Walker
post Mar 17 2010, 01:05 AM
Post #28


Junior Member
**

Group: Members
Posts: 94
Joined: 15-October 09
Member No.: 4979



I think thats the problem, I don't have admin rights on my work computer.

QUOTE (M@! @ Mar 16 2010, 07:03 PM) *
Do you have local administrator rights on your workstation? Is it possible that you need to register the DLL?



Go to the top of the page
 
+Quote Post
Sajid
post May 2 2010, 05:33 AM
Post #29


Newbie
*

Group: Members
Posts: 9
Joined: 30-April 10
Member No.: 5339



Hi guys,

I'm working on a real-time renderer for large data-sets, and i stumbled onto this website while trying to figure out how to read Mars data into my program. Fascinating website, and I am amazed to see the zeal/respect/love you guys have for outer-space!

Anyway, sticking to the topic of the thread: Does IMG2PNG produce 32-bit floating PNGs or does it scale them to 16-bit unsigned integers?
Go to the top of the page
 
+Quote Post
JohnVV
post May 3 2010, 12:12 AM
Post #30


Member
***

Group: Members
Posts: 890
Joined: 18-November 08
Member No.: 4489



i am not sure but most of the mars data is 12 bit black & white
nasa-view out puts to 8 bit indexed gray
isis3 ( at the moment ) outputs to a 8 bit gray png and 8 bit tiff ( the tiff should be fixed soon )

i have been running Linux for YEARS and have not needed the MS Windows img2png.exe
Go to the top of the page
 
+Quote Post

9 Pages V  < 1 2 3 4 > » 
Reply to this topicStart new topic

 



RSS Lo-Fi Version Time is now: 19th March 2024 - 02:04 PM
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.