Reza A Tabibazar.

Sorting images based on their Pixel Dimension. (ver 0.5)

Administrator — Sun, 16 Sep 2007 13:30:05 +0000

I have a lot of images and almost all of them are saved based on JPEG standard. I have tried different software to sort them based on size but none that I know can do it based on image's pixel dimension(1). JPEG compresses an image based on the color information present in the image (2). Thus, the file sizes are not a true representation of how large an image is when displayed on screen. In trying to sort out small images based on their width or height we face the challenge of sorting images which are unusually tall or wide. Hence, sorting images based on their pixel dimension is a more accurate way of sorting images into groups. I present a script in PHP that does exactly that. The code is fast enough although you need to increase the execution time in php.ini. This script is to be used as a shell script and not in a website. Here are the results I got:
Total of 1019 out of 10000 were small.
Total of 2407 out of 10000 were medium.
Total of 6574 out of 10000 were large.
406.990354061 seconds to sort images

So that is roughly 0.04 seconds for each image.

Listings: HotScript Listed!
px.sklar.com Listed!

PLAIN TEXT

PHP:

/*
small :
150 x 150 or smaller
medium :
larger than 150 x 150 and
smaller than 500 x 500
large :
500 x 500 or larger
*/
function pixel_dim_sort($src_dir, $dest_dir){
$dir = $src_dir; // directory where the unsorted images are
// $dest_dir directory where sorted images will be stored
// in three folders small, mediam and large
if (!file_exists($dir))
{ echo "Source directory $dir does not exist!
\n "; exit;}
if (!file_exists($dest_dir ))
mkdir($dest_dir ); // create the sorted images directory if it does not exist
$dir_small = $dest_dir . "small/";
$dir_medium = $dest_dir . "medium/";
$dir_large = $dest_dir . "large/";
$pixel_dim_small = 22500; // x <= 150*150
$pixel_dim_medium = 250000 ; //500*500<= x <150*150
$pixel_dim_large = 250000; // x> 500*500
if (!file_exists($dir_small))
mkdir($dir_small);
if (!file_exists($dir_medium))
mkdir($dir_medium);
if (!file_exists($dir_large ))
mkdir($dir_large );
$total_count =0;
$total_small = 0;
$total_medium = 0;
$total_large = 0;
// Open a known directory, and proceed to read its contents
if (is_dir($dir)) {
if ($dh = opendir($dir)) {
while (($file = readdir($dh)) !== false) {
if($file != '.' && $file != '..'){
$imagehw = GetImageSize($dir. $file);
$total_count++;
$imgdim= $imagehw[0]*$imagehw[1];
if( $imgdim <= $pixel_dim_small) {
$bool = copy($dir. $file, $dir_small . $file);
if ($bool ) // making sure we don't delete the file which is not copied
unlink($dir.$file);
else {echo "copy file failed ... "; exit; }
$total_small++;
}
elseif( ($imgdim> $pixel_dim_small) && ($imgdim <= $pixel_dim_medium) ) {
$bool = copy($dir. $file, $dir_medium . $file);
if ($bool )
unlink($dir.$file);
else {echo "copy file failed ... "; exit; }
$total_medium++;
}
elseif($imgdim > $pixel_dim_large) {
$bool = copy($dir. $file, $dir_large . $file);
if ($bool )
unlink($dir.$file);
else {echo "copy file failed ... "; exit; }
$total_large++;
}
}
}
closedir($dh);
}
}
$total_count = $total_small + $total_medium + $total_large;
echo "Total of $total_small out of $total_count were small.
\n ";
echo "Total of $total_medium out of $total_count were medium.
\n ";
echo "Total of $total_large out of $total_count were large.
\n ";
}
$start = time() + microtime();
pixel_dim_sort("f:/0000/new/", "f:/0000/sorted2/");
echo time() + microtime() - $start, ' seconds to sort images.';

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An AFP photo with problems!

Administrator — Thu, 16 Aug 2007 10:17:29 +0000

More update: I am not the only one noticing the picture ... Trailrank
Update: Looks like Yahoo has pulled the photo off....

I came across a photo by AFP on yahoo news that seemed not true.

A bullet is the projectile that kills or destroys and it is the top section of a cartridge. As you can see in the photo the two cartridges are intact and brand new. They are not fired at all. I had to post this because errors like this might undermine the horrible truth about human suffering in war zones.

Original photo link: http://news.yahoo.com
Reference on bullets: http://en.wikipedia.org/wiki/Bullet

Disclaimer:
Everything not me "rxt7.com" belongs to their owners including and not limited to their names, logos, graphics, and text.

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Building a Tripod Panorama Head

Administrator — Sat, 30 Jun 2007 12:59:22 +0000

Panoramas are great for for a variety of photographic scenes specially landscapes, but I also like the creative/artistic possibilities it offers as well. So I decided to buy a panoramic tripod, and after much research I found them to be very expensive, considering what they are. I searched for DIY panorama heads and I found three descriptions to be the most inspiring. However, I was going to mound a Nikon D200 which is heavy and I am not very good with wood, so I made one with soft steel! I basically took a strip of steel 21mm wide and 480 mm long and twisted and turned it to get the basic shape.

Then added a welded a piece 270 mm long to make the railing where the camera will mount and be adjusted for the rotation around entrance pupil. Later finished with adding the mounting bracket and nut.

After much grinding and cleaning here it is! ( I know there is a D100 on it now!)

Here is a test picture. The only problem is with lighting and exposure adjustment!

22 images
Size: 23841 x 3220
FOV: 360.00° x 45.98°
Lens: Standard
Projection: Cylindrical

Ref:

Worth 1000
Wandel
Stockhomviews

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Quick and dirty SETI@home stats

Administrator — Mon, 15 Jan 2007 10:01:06 +0000

I have used the WAP interface for getting the stats, which are placed in an array and you can choose what to display on your own home page. All you need is to change the id number in the URL and you are set to go!

$stat = file_get_contents("http://setiathome.berkeley.edu/userw.php?id=59935") ; $stat = str_replace(" ", "|", $stat); $stat = strip_tags($stat); $stats = explode("|", $stat); /* [0] => SETI@home [1] => Account Data [2] => for Tabibazar [3] => Time: 15 Jan 2007 01:54:12 UTC [4] => User TotCred: 4,945.62 [5] => User AvgCred: 0.16 [7] => Team: Spread Firefox [8] => Team TotCred: 7,841,248.97 [9] => Team AvgCred: 8,265.01 */ echo $stats[4]; ?>

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And so there it goes!

Administrator — Wed, 10 Jan 2007 03:24:21 +0000

It is 2007! Supposedly everyone "enters" the new year with a resolution to make themselves better or to do something. When I was growing up, I would always separate some time to myself and think about the last year and what had happened and how it was. I stopped doing that about ten years ago. I never figured out why it was but I went from a semi-existentialist person to a fatalist. May be with age, nature had taught me not to be overly confident with my abilities. Being bombarded with many nice events in my life like getting married. I have also been showered with endless personal pain and difficulties. Most people would start thinking along the lines of destiny and so on and so forth. But, that is not good enough! I have come to think that we usually think about the world as a duality. What I mean we perceive the world as something against the other. For example, light versus dark, good versus evil and so on. What if there is no polarity to the world, then it will be very comforting in my view. This may be nothing new but imagine if behavior or life is a histogram, vertical axis being events or actions and the horizontal axis being absolute good to the left and absolute bad to the right . When someone does something bad. I would not think that he is an (absolute) bad person. I would think that his histogram of behavior has more points towards right! And vice versa I am trying to have more points on the left. And so there it goes, I just made life and inverted luminosity histogram of a photograph. All we can hope to do is to be a well exposed photograph. When talking of histograms one has to also take into account that there is a time frame of sort. So if one claims the the world is cruel to him you could ask how long has it been and how often has he sampled the actions of the world.
More to come in the future!

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The Value of Privacy

Administrator — Thu, 15 Jun 2006 09:33:14 +0000

June 15, 2006
by Bruce Schneier
http://www.schneier.com
http://www.counterpane.com

Last month, revelation of yet another NSA surveillance effort against
the American people rekindled the privacy debate. Those in favor of
these programs have trotted out the same rhetorical question we hear
every time privacy advocates oppose ID checks, video cameras, massive
databases, data mining, and other wholesale surveillance measures: "If
you aren't doing anything wrong, what do you have to hide?"

Some clever answers: "If I'm not doing anything wrong, then you have no
cause to watch me." "Because the government gets to define what's
wrong, and they keep changing the definition." "Because you might do
something wrong with my information." My problem with quips like these
-- as right as they are -- is that they accept the premise that privacy
is about hiding a wrong. It's not. Privacy is an inherent human right,
and a requirement for maintaining the human condition with dignity and
respect.

Two proverbs say it best: "Quis custodiet ipsos custodes?" ("Who
watches the watchers?") and "Absolute power corrupts absolutely."

Cardinal Richelieu understood the value of surveillance when he
famously said, "If one would give me six lines written by the hand of
the most honest man, I would find something in them to have him
hanged." Watch someone long enough, and you'll find something to arrest
-- or just blackmail -- him with. Privacy is important because without
it, surveillance information will be abused: to peep, to sell to
marketers, and to spy on political enemies -- whoever they happen to be
at the time.

Privacy protects us from abuses by those in power, even if we're doing
nothing wrong at the time of surveillance.

We do nothing wrong when we make love or go to the bathroom. We are not
deliberately hiding anything when we seek out private places for
reflection or conversation. We keep private journals, sing in the
privacy of the shower, and write letters to secret lovers and then burn
them. Privacy is a basic human need.

A future in which privacy would face constant assault was so alien to
the framers of the Constitution that it never occurred to them to call
out privacy as an explicit right. Privacy was inherent to the nobility
of their being and their cause. Of course being watched in your own
home was unreasonable. Watching at all was an act so unseemly as to be
inconceivable among gentlemen in their day. You watched convicted
criminals, not free citizens. You ruled your own home. It's intrinsic
to the concept of liberty.

For if we are observed in all matters, we are constantly under threat
of correction, judgment, criticism, even plagiarism of our own
uniqueness. We become children, fettered under watchful eyes,
constantly fearful that -- either now or in the uncertain future --
patterns we leave behind will be brought back to implicate us, by
whatever authority has now become focused upon our once-private and
innocent acts. We lose our individuality, because everything we do is
observable and recordable.

How many of us have paused during conversations in the past
four-and-a-half years, suddenly aware that we might be eavesdropped on?
Probably it was a phone conversation, although maybe it was an e-mail
or instant message exchange or a conversation in a public place. Maybe
the topic was terrorism, or politics, or Islam. We stop suddenly,
momentarily afraid that our words might be taken out of context, then
we laugh at our paranoia and go on. But our demeanor has changed, and
our words are subtly altered.

This is the loss of freedom we face when our privacy is taken from us.
This was life in the former East Germany, or life in Saddam Hussein's
Iraq. And it's our future as we allow an ever-intrusive eye into our
personal, private lives.

Too many wrongly characterize the debate as "security versus privacy."
The real choice is liberty versus control. Tyranny, whether it arises
under threat of foreign physical attack or under constant domestic
authoritative scrutiny, is still tyranny. Liberty requires security
without intrusion, security plus privacy. Widespread police
surveillance is the very definition of a police state. And that's why
we should champion privacy even when we have nothing to hide.

A version of this essay originally appeared on Wired.com.
http://www.wired.com

Daniel Solove comments:
http://www.concurringopinions.com

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Firefox download counter using XSLT and php

Administrator — Wed, 17 May 2006 10:45:37 +0000

Here is a quick script to get the total Firefox downloads from its RSS feed using XSLT with php 4.4.x and 5.x:

PHP 4 test script
PHP 5 test script

PHP source code

XSLT source code

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Strange routing of DHL packages

Administrator — Sat, 15 Apr 2006 12:44:54 +0000

This two page letter has crossed the Atlantic 3 times!



Date	Time	Location Service Area	Checkpoint Details

April 07, 2006	01:37	Express Logistics Centre, Dubai - United Arab Emirates	Arrived at DHL facility in Express Logistics Centre, Dubai - United Arab Emirates
April 07, 2006	12:11	Express Logistics Centre, Dubai - United Arab Emirates	Departed from DHL facility in Express Logistics Centre, Dubai - United Arab Emirates
April 07, 2006	20:58	Cologne - Germany	Arrived at DHL facility in Cologne - Germany
April 08, 2006	02:18	Cologne - Germany	Departed from DHL facility in Cologne - Germany
April 08, 2006	04:11	East Midlands - UK	Departed from DHL facility in East Midlands - UK
April 08, 2006	06:38	New York City Gateway, NY - USA	Arrived at DHL facility in New York City Gateway - USA
April 09, 2006	18:16	Brussels - Belgium	Departed from DHL facility in Brussels - Belgium
April 10, 2006	02:53	London-Heathrow - UK	Arrived at DHL facility in London-Heathrow - UK
April 10, 2006	10:31	London-Heathrow - UK	Departed from DHL facility in London-Heathrow - UK
April 10, 2006	23:31	Toronto - Canada	Departed from DHL facility in Toronto - Canada
April 11, 2006	07:34	Markham - Canada	Arrived at DHL Facility
April 11, 2006	09:54	Markham - Canada	With delivery courier
April 11, 2006	13:25	Markham - Canada	Shipment delivered

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I wonder why?

Administrator — Wed, 15 Mar 2006 03:16:25 +0000

I talked about my problems with uTorrent and choose BitComet as a torrent client. I wonder why BitComet needs to send an email?

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Word Play and Life

Administrator — Wed, 08 Mar 2006 17:37:56 +0000

Here is a nice site to consider if you are confused with words like "freedom" and "civil libirties"
anxietyculture.com
Cheers,

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