Comments on: Image fun

By: Sulejow

Sulejow — Sat, 19 Nov 2011 16:08:50 +0000

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By: everything about java

everything about java — Mon, 17 Oct 2011 02:50:23 +0000

everything about java…

[...]Image fun / Stoyan’s phpied.com[...]…

By: Image fun with PHP

Image fun with PHP — Thu, 05 May 2011 08:58:31 +0000

[...] one of the image fun is here, it contains code that more or less does the same things, but pixel by pixel, which is very slow, [...]

By: Heleg

Heleg — Mon, 07 Feb 2011 10:27:54 +0000

The last function in previous Reply

private function addColor($value=0,$addvalue=0)
{
$n=$value+$addvalue;
return ($n > 255) ? 255 : (($n < 0) ? 0 : (int)($n));
}

By: Heleg

Heleg — Mon, 07 Feb 2011 10:25:06 +0000

Thanks for the article
Let me offer a few more functions
/*
*Changing the color scale == coarsening, reducing the number of shades
* @param $factor Int from 1 to 255
*/
public function scale($factor=8)
{$r=round($this->r/$factor);
$g=round($this->g/$factor);
$b=round($this->b/$factor);
$this->r=$this->addColor(0,$r*$factor);
$this->g=$this->addColor(0,$g*$factor);
$this->b=$this->addColor(0,$b*$factor);

}

/*
* Approximation to a certain color, default to white
* Фактор от 0 до бесконечности определяет степень приближения
* @param $factor Double from -1 to any positiv number
* @params $r,$g,$b Int from 0 to 255
*/
public function closerTo($factor=5,$r=255, $g=255, $b=255)
{ $n=($this->r+$factor*$r)/($factor+1);
$this->r=$this->addColor(0, $n);
$n=($this->g+$factor*$g)/($factor+1);
$this->g=$this->addColor(0, $n);
$n=($this->b+$factor*$b)/($factor+1);
$this->b=$this->addColor(0, $n);
return true;
}
/*
Function for the addition (and subtraction) in the colors
* The result is always> = 0 and 255) ? 255 : (($n < 0) ? 0 : (int)($n));
}

By: Łomża Bazzell

Łomża Bazzell — Sat, 08 Jan 2011 07:29:01 +0000

It’s excellent site, I was looking for something like this

By: Shadow

Shadow — Fri, 26 Feb 2010 16:14:45 +0000

Hi ! Very good article for the beginners. However I’m searching for a function to know the brightness of a gif file…is it more clear or more dark ? Do you know if it’s possible ? Best Regards.

http://www.doktortr.net

By: Sachin B

Sachin B — Mon, 21 Dec 2009 11:45:06 +0000

Thanks, Nice Article

By: Res

Res — Sun, 02 Aug 2009 09:46:32 +0000

function colortune($pixel, $factor)
{
$pixel->r=$pixel->r + $factor[0];
$pixel->g=$pixel->g + $factor[1];
$pixel->b=$pixel->b + $factor[2];

return new Pixel(
$pixel->r,
$pixel->g,
$pixel->b
);
}

use:
$factor=array(“$r”,”$g”,”$b”);
$po->pixelOperation($image, $img2, array($po, ‘colorbalance’), $factor);

ReS©

test:
original: http://narod.ru/disk/11543277000/0.png.html
$factor=array(“44″,”138,”44″);
$po->pixelOperation($image, $img2, array($po, ‘colortune’), $factor);
$po->pixelOperation($img2, $img2, array($po, ‘adjustBrightness’), “-25″);
$po->pixelOperation($img2, $img2, array($po, ‘gamma’), “1.5″);
result: http://narod.ru/disk/11543243000/00.png.html

By: Nikolay from Russia

Nikolay from Russia — Fri, 24 Jul 2009 21:50:11 +0000

Very good. Thank you!