[Ilugc] Image processing in 16 bit color depth?
Hi, Gimp is limited to handling 8 bit color depth only. Any pointers to a good alternative in Linux to handle 16 bit color depth? I use UFRaw to manage raw file from the camera and it handles all color depths. But I need something interactive like Gimp for post processing. Also, anybody else interested in long exposure photography and/or astro photography? One tool which is an absolute must is a stacking software. This seems non existent in the Linux world. My image processing / math skills are not good enough to write one on my own. Anybody else having any luck on this? I am forced to depend on my Windows box to do most of the processing work. Writing a stacking software for Linux does seem inviting as the monsoons have set in and our telescopes and cameras are locked in... Regards, Arun http://wondroussky.blogspot.in/ கற்றது கைமண் அளவு, கல்லாதது உலகளவு - ஔவையார் Known is a drop, Unknown is an ocean ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
Re: [Ilugc] Net Traffic Log
On Sat, Jun 23, 2012 at 11:37 PM, Harisankar P S mai...@hsps.in wrote: Hey, Is there a way to keep track of the network traffic through all the different interface devices in my system. Or a library to do so, I want to create a log that store the total size of file transfered since the script or program starts running. vnstat is also good at it. vnstat -i eth0 -d eth0 / daily day rx | tx |total| avg. rate +-+-+--- 05/27/12 28.17 MiB |5.02 MiB | 33.19 MiB |3.15 kbit/s 05/28/12 0 KiB | 0 KiB | 0 KiB |0.00 kbit/s 05/29/12 20.62 MiB |3.32 MiB | 23.94 MiB |2.27 kbit/s -- Regards, Balasubramaniam Natarajan www.etutorshop.com/moodle/ ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
Re: [Ilugc] Image processing in 16 bit color depth?
I don't have much idea about this, How about imagemagick ? -- Regards, Balasubramaniam Natarajan www.etutorshop.com/moodle/ ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
Re: [Ilugc] Tools for simulating network issues
Hi Bala, On Mon, Jun 25, 2012 at 10:21 AM, Balachandran Sivakumar benignb...@gmail.com wrote: I guess the tc tool would be of use to you. You can do something like this: # tc qdisc add dev eth0 root netem delay 100ms for adding a 100ms delay to all packets. It can be deleted later. tc lets us do a lot of things. This was just an example. A wrapper script over tc should be able to do the job. Thanks. didn't know about tc. Looks like this will be useful for part of my needs (for atleast simulating latency). cheers, -Suraj -- Career Gear - Industry Driven Talent Factory http://careergear.in/ ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
Re: [Ilugc] Free CAD/AUTOCAD Software
Greetings, On Sun, Jun 24, 2012 at 8:36 AM, Kingsley G. Morse Jr. kings...@loaner.com wrote: Hi Jacob, I liked blender better than librecad. If I recall correctly, it has better documentation, and a more helpful IRC channel. I hope that helps, Kingsley For drafting alone, IMHO, Autocad is an overkill. And there is freecad. http://sourceforge.net/apps/mediawiki/free-cad/index.php?title=Main_Page etc. -- Regards, Rajagopal ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
[Ilugc] Watermark using Composite, Python and Identify
A few days ago I wanted to watermark few of my images on command line and I wrote this blog http://bullet-bala.blogspot.in/2012/06/adding-watermark.htmland the trouble which I had was that the Watermark was either very small or very big and got out of the final image. The result of which I created a small python script to extract the Dimension of an image and resize my Watermarker so my water marker always looks okay on the final image. Initial step create an watermark image and put in inside /usr/local/src/watermark1.jpeg or whereever you desire and change the script accordingly. Next call my python script on command line like so Process of Adding WaterMarkhttp://4.bp.blogspot.com/-wbKms9uXOns/T-gGScyN-yI/ASs/mcbu7XXpjO0/s1600/WaterMarkProcess.jpeg Python Scripthttp://1.bp.blogspot.com/-csmV0mkdgAI/T-gGvcvMHwI/AS8/44f-fRdyVaI/s1600/WaterMarkProcess_PythonScript.jpeg The text version of the python script is in herehttp://bullet-bala.blogspot.in/2012/06/watermark-using-composite-python-and.html -- Regards, Balasubramaniam Natarajan www.etutorshop.com/moodle/ ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
Re: [Ilugc] Tools for simulating network issues
Thanks. didn't know about tc. Looks like this will be useful for part of my needs (for atleast simulating latency). Just had a look at its manpages, I am happy to learn that at least learned that such a tool exists. http://manpages.ubuntu.com/manpages/lucid/man8/tc.8.html -- Regards, Balasubramaniam Natarajan www.etutorshop.com/moodle/ ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
Re: [Ilugc] Query: Tools for monitoring servers
On Mon, Jun 25, 2012 at 11:16 AM, K.C. Ramakrishna kcramakris...@yahoo.comwrote: I have researched all the usual suspects: Cacti, Nagios, ZenOSS, Zabix?.. JMX seems to be very popular for tomcat/Java. What are your recommendations for handling this scenario? What are the pros and cons of various tools and approaches? Please do share your thoughts on what will be a good solution. All live examples will be very welcome in educating us. I have used xymon before and it is really good. http://www.xymon.com/ -- Regards, Balasubramaniam Natarajan www.etutorshop.com/moodle/ ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
Re: [Ilugc] Image processing in 16 bit color depth?
Greetings, On Mon, Jun 25, 2012 at 11:31 AM, Arun Venkataswamy arun...@gmail.com wrote: Hi, Gimp is limited to handling 8 bit color depth only. From: http://en.wikipedia.org/wiki/GIMP [quote] GEGL The Generic Graphics Library (GEGL) was first introduced as part of GIMP on the 2.6 release of GIMP. This initial introduction does not yet exploit all of the capabilities of GEGL; as of the 2.6 release, GIMP can use GEGL to perform high bit-depth color operations; because of this less information is lost when performing color operations.[33] When fully integrated, GEGL will allow GIMP to have a higher color bit depth and also a better non-destructive work-flow. [/quote] -- Regards, Rajagopal ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
Re: [Ilugc] Query: Tools for monitoring servers
Greetings, On Mon, Jun 25, 2012 at 11:16 AM, K.C. Ramakrishna kcramakris...@yahoo.com wrote: Hi all, We are trying to look into monitoring servers in Beta and Prod environments. The stack: a. 2(more in future) Front End apache httpd/tomcat/Liferay Servers b. Independent CAS-SSO and SOLR servers. c. standalone server running webservices (written in Java) d. 2MySQL (Percona) servers 1 WRITE server and both READ. e. Front end Hardware Load Balancers. We want to monitor continuously: a. All the Linux boxes and the services running on them, b. The performance (and history) of the Java applications too. While monit helps to some extent, I found Zabbix pretty slick in handling monitoring requirements. Please explore many templates available. For example, there was a very good mysql performance monitor way back in Mid-2010. This zabbix instance was required to monitor around 250 sites spread across an Indian states for various services. Did a decent job. I haven't checked lately as I did not have the need. From: http://www.zabbix.com/monitor_everything.php [quote] Built-in Java Application Server Monitoring New with Zabbix 2.0 is an ability to monitor Java application servers over JMX directly - no need for 3rd party modules or integration layers anymore. Monitor JBoss, Tomcat, Oracle Application Server or any others with the efficient Zabbix Java gateway. [/unquote] HTH -- Regards, Rajagopal PS. I tried contacting on LL and left a message ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
Re: [Ilugc] Image processing in 16 bit color depth?
On Mon, Jun 25, 2012 at 12:23 PM, Rajagopal Swaminathan raju.rajs...@gmail.com wrote: Greetings, On Mon, Jun 25, 2012 at 11:31 AM, Arun Venkataswamy arun...@gmail.com wrote: Hi, Gimp is limited to handling 8 bit color depth only. From: http://en.wikipedia.org/wiki/GIMP [quote] GEGL The Generic Graphics Library (GEGL) was first introduced as part of GIMP on the 2.6 release of GIMP. This initial introduction does not yet exploit all of the capabilities of GEGL; as of the 2.6 release, GIMP can use GEGL to perform high bit-depth color operations; because of this less information is lost when performing color operations.[33] When fully integrated, GEGL will allow GIMP to have a higher color bit depth and also a better non-destructive work-flow. [/quote] Yes, Support for 16 bits is expected in release 3.0 Regards, Arun ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
Re: [Ilugc] Image processing in 16 bit color depth?
On Mon, Jun 25, 2012 at 12:00 PM, Balasubramaniam Natarajan bala150...@gmail.com wrote: I don't have much idea about this, How about imagemagick ? Imagemagick supports it. But I am looking for an interactive tool. Specifically to stretch colors. This has to be done interactively as human feedback is necessary. Regards, Arun ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
Re: [Ilugc] Query: Tools for monitoring servers
On Mon, Jun 25, 2012 at 11:16 AM, K.C. Ramakrishna kcramakris...@yahoo.com wrote: Hi all, We are trying to look into monitoring servers in Beta and Prod environments. The stack: a. 2(more in future) Front End apache httpd/tomcat/Liferay Servers b. Independent CAS-SSO and SOLR servers. c. standalone server running webservices (written in Java) d. 2MySQL (Percona) servers 1 WRITE server and both READ. e. Front end Hardware Load Balancers. We want to monitor continuously: a. All the Linux boxes and the services running on them, b. The performance (and history) of the Java applications too. We are exploring the best ways to monitor the whole setup including alerts and automated restarts etc. We are primarily from a development background with only basic admin experience (basic bash, installations, tuning etc). I have researched all the usual suspects: Cacti, Nagios, ZenOSS, Zabix?.. JMX seems to be very popular for tomcat/Java. What are your recommendations for handling this scenario? What are the pros and cons of various tools and approaches? Please do share your thoughts on what will be a good solution. All live examples will be very welcome in educating us. All the tools you've mentioned above are systems level monitoring applications. While they are also useful, easy to setup and also needed, they can only give you so much information about your applications by measuring information about the stuff that is outside (like the JVM's / the OS's internals). The problem being that the application we care about is treated like a Black Box. This may be useful if we had a well behaving / well understood black box. But usually we don't - even if we do, it changes. I've found the following general pattern of practical Dev Ops problems occur frequently at work: Scenario#1: * The ops says From insert system monitoring tool, we see that network I/O has increased since last launch. We believe that performance can increase if our application reduced excessive fetches and instead chose to cache or preload * The dev says Well, you guys seem to be running insert operational monitoring / management tool on *your* machines for management. It is not the problem of our application. We are not at fault! We have done nothing that increases reads. We deny it all! (replace network I/O with anything that cannot be pin pointed) Scenario#2: * The ops says From insert system monitoring tool, we see that there was a CPU spike. Any idea what happened? Here are the application's logs from the time * Dev says We don't know which function/component/part caused it. We will try to reproduce it in the lab. (and usually, no lab can be as hairy as reality) At the last startup I worked (which is no longer a startup and was serving close to half a million requests per second as of 6 months ago), we zero'ed in on mondemand to do white box metrics measurement to tackle the above mentioned frequently recurring scenarios. See http://mondemand.org/ . We chose LWES as the transport, but that was based on our setup. YMMV. mondemand requires instrumenting one's code. mondemand also requires one-time investment in effort towards collectively brainstorming about what metrics we want to measure and how we will measure it by putting the app and business in focus. But once done, the pay off is self evident due to the black box turning into a 'white box'. In terms of the above mentioned system tools (zabbix, nagios, etc.,) - it is my opinion that the incremental advantage over each other may be negligible since almost all of them provide extensibility (plugins / extensions). The distinct advantages of mondemand are: 1. when the app is Java and the system is Unix, there is a large gap created between the dev and the ops. Unix'y things like signals, controlling I/O streams (logging), controlling priority or even measuring memory used, etc., are difficult to achieve. Yes, JMX can help, somewhat, but again JMX is a means of measuring/controlling the Java system (not the app). 2. As mentioned above, white box measurement is the biggest gain. 3. App can react to outside events - not only within the system but also networked events (ex: if you restarted the DB, the DB restart script could emit an event and the app can react by reestablishing the connection) Yes, a small performance penalty for all of this - but, IMHO, it is worth it. :) cheers, -Suraj -- Career Gear - Industry Driven Talent Factory http://careergear.in/ ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
Re: [Ilugc] Image processing in 16 bit color depth?
Hi, On Mon, Jun 25, 2012 at 12:30 PM, Arun Venkataswamy arun...@gmail.com wrote: On Mon, Jun 25, 2012 at 12:00 PM, Balasubramaniam Natarajan bala150...@gmail.com wrote: I don't have much idea about this, How about imagemagick ? Imagemagick supports it. But I am looking for an interactive tool. Specifically to stretch colors. This has to be done interactively as human feedback is necessary. I remember playing with a tool called Cinepaint: http://www.cinepaint.org/ IIRC, they were a fork from the 1.0 series of Gimp. They were able to handle 16-bit per channel images when GEGL was still on the drawing board. See http://www.cinepaint.org/cinepaint-docs/ to decide if it meets your needs. Amartyo Regards, Arun ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
Re: [Ilugc] Image processing in 16 bit color depth?
On Mon, Jun 25, 2012 at 1:20 PM, amartyo banerjee amar...@gmail.com wrote: Hi, On Mon, Jun 25, 2012 at 12:30 PM, Arun Venkataswamy arun...@gmail.com wrote: On Mon, Jun 25, 2012 at 12:00 PM, Balasubramaniam Natarajan bala150...@gmail.com wrote: I don't have much idea about this, How about imagemagick ? Imagemagick supports it. But I am looking for an interactive tool. Specifically to stretch colors. This has to be done interactively as human feedback is necessary. I remember playing with a tool called Cinepaint: http://www.cinepaint.org/ Thanks for the link. I will check this out. Also, got to know that 16 bit color depth is now supported in the development branch of Gimp. Hope to download the source and compile it some time soon. Regards, Arun http://wondroussky.blogspot.in/ கற்றது கைமண் அளவு, கல்லாதது உலகளவு - ஔவையார் Known is a drop, Unknown is an ocean ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
Re: [Ilugc] Image processing in 16 bit color depth?
Hi, On Mon, Jun 25, 2012 at 11:31 AM, Arun Venkataswamy arun...@gmail.com wrote: Hi, snip Also, anybody else interested in long exposure photography and/or astro photography? One tool which is an absolute must is a stacking software. This seems non existent in the Linux world. My image processing / math skills are not good enough to write one on my own. Anybody else having any luck on this? I am forced to depend on my Windows box to do most of the processing work. Writing a stacking software for Linux does seem inviting as the monsoons have set in and our telescopes and cameras are locked in... On the following link: http://www.heroinewarrior.com/movies.php please see the writeup for 'MOTION DEMO 5'. Is the process described there what you are trying to do? If so, maybe you could use the software called Cinelerra, available at: http://www.heroinewarrior.com/cinelerra.php or at http://cinelerra.org/ Also a google search for stacking software to use in astrophotography under linux suggests the following links: http://exposit.disjunkt.com/ http://dulle.free.fr/alidade/siril.php?lan=en These are apparently dedicated stacking software. Please check if they are what you are looking for, and up the mark in terms of usability and quality. Regards Amartyo ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
Re: [Ilugc] Net Traffic Log
On Sun, Jun 24, 2012 at 2:07 AM, Harisankar P S wrote: Is there a way to keep track of the network traffic through all the different interface devices in my system. Or a library to do so, I want to create a log that store the total size of file transfered since the script or program starts running. May be a script that monitor the Rx/Tx packet counts from ifconfig output. You can start and stop this script along with your target application. Bye :) -- Bharathi Subramanian ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
Re: [Ilugc] Image processing in 16 bit color depth?
On Mon, Jun 25, 2012 at 3:06 PM, amartyo banerjee amar...@gmail.com wrote: On Mon, Jun 25, 2012 at 11:31 AM, Arun Venkataswamy arun...@gmail.com wrote: Also, anybody else interested in long exposure photography and/or astro photography? One tool which is an absolute must is a stacking software. This seems non existent in the Linux world. My image processing / math skills are not good enough to write one on my own. Anybody else having any luck on this? I am forced to depend on my Windows box to do most of the processing work. Writing a stacking software for Linux does seem inviting as the monsoons have set in and our telescopes and cameras are locked in... On the following link: http://www.heroinewarrior.com/movies.php please see the writeup for 'MOTION DEMO 5'. Is the process described there what you are trying to do? If so, maybe you could use the software called Cinelerra, available at: http://www.heroinewarrior.com/cinelerra.php or at http://cinelerra.org/ Stacking in astronomy is the process of adding exposures (shots). That is, if you take 20 Nos of 2 minute exposures (shots), a `stacking` software will allow you to combine the 20 shots to create an image with apparent information you could get with 20X2 = 40 minutes of exposure. Your links below are perfect. Also a google search for stacking software to use in astrophotography under linux suggests the following links: http://exposit.disjunkt.com/ This is a good link. Thanks. It is very basic. Might be a good starting point for me to develop on top of this. This app seems to simply add frames together. Normally, - Individual shots need to be `registered`, that is clip and realign the stars in each frame so that the pixels can be overlapped blindly - Not Done, assumes input is already aligned. - Dark frame subtraction, that is, remove camera's signature noise at given ambient condition - Done - Vignetting subtraction, that is equalize bright and dark areas for a given camera and lens combination - Done - Actual stacking - New apps in the windows world have about 6 ways this can be done. Some of them return incredible results. Will try to work on this. http://dulle.free.fr/alidade/siril.php?lan=en It claims to be a clone of IRIS. IRIS is one app which is so imposing and has such a steep learning curve I have never been able to use it properly. So can't comment on this. Thanks for the links Regards, Arun http://wondroussky.blogspot.in/ கற்றது கைமண் அளவு, கல்லாதது உலகளவு - ஔவையார் Known is a drop, Unknown is an ocean ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
Re: [Ilugc] Fwd: [Inpycon] PyCon India 2012 - Registrations are open
Early Bird Registration Sold Out!!! :-( Regards, Sathishkumar D ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
[Ilugc] Request for Workshop reg
Hi all, I am Dinesh doing final year IT in Kongu Engineering College,Perundurai. We are planning to conduct a LAMP workshop. But I don't know whom to contact about this.Is anyone is ready to come or pls send some suggestion about this. Thanks in advance.. -- With regards, Dinesh Infotech https://dineshbeginner.wordpress.com/ ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
[Ilugc] remote_desktop_viewer
Dear ilugcs, please share any of the best open source best remote desktop monitoring tool for Ubuntu system . -- with thanks (Asir)R.Mariya Sagaya Asirvatham 9994226499 ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
