watermark on upload

joeorgasmic · 03-31-2005, 04:09 AM

I'm starting a free image hosting site and I'm looking for a script that can add a small watermark (that displays link to my site) to each image when the user uploads it. Any suggestions?

luxinterior · 03-31-2005, 05:07 AM

I'm sure you can find something over at hotscript.com but I'm just wondering about the legality of watermaking somebody elses pictures. Just something to consider.

Lux

gamex · 03-31-2005, 05:28 AM

I used something like this:

PHP Code:

  $watermark = "path/to/watermark/image.png";

$quality = "80";

$imagedir = "path/to/graphics/";

 
$workingdir = opendir ($imagedir);

while ($entry = readdir($workingdir)) {

     if(eregi(".+\.jpe?g$", $entry )) { 

         $i=1;

    watermark($imagedir."/".$entry, $entry, $watermark, $quality);

    $i++;

     } 

}

 
function watermark($srcfilename, $newname, $watermark, $quality) {

$imageInfo = getimagesize($srcfilename); 

$width = $imageInfo[0]; 

$height = $imageInfo[1]; 

$logoinfo = getimagesize($watermark);

$logowidth = $logoinfo[0];

$logoheight = $logoinfo[1];

$horizextra =$width - $logowidth;

$vertextra =$height - $logoheight;

$horizmargin =  round($horizextra / 2);

$vertmargin =  round($vertextra / 2);

$photoImage = ImageCreateFromJPEG($srcfilename);

????: NamePros.com http://www.namepros.com/programming/79125-watermark-on-upload.html
ImageAlphaBlending($photoImage, true);

$logoImage = ImageCreateFromPNG($watermark);

$logoW = ImageSX($logoImage);

$logoH = ImageSY($logoImage);

ImageCopy($photoImage, $logoImage, $horizmargin, $vertmargin, 0, 0, $logoW, $logoH);

????: NamePros.com http://www.namepros.com/showthread.php?t=79125
//ImageJPEG($photoImage); // output to browser

ImageJPEG($photoImage,"images/watermarked/wm_".$newname, $quality); 

ImageDestroy($photoImage);

ImageDestroy($logoImage);

}

I used this code on my site a while ago. This code will actually add the water mark to all of the images in a directory. You can change the line of code that reads the directory to something that uploads the file.

redhippo · 03-31-2005, 05:52 AM

great code Joe!

Mystic · 03-31-2005, 07:22 AM

and about the legality of adding a watermark, put it in the terms and conditions

picobello · 03-31-2005, 07:30 AM

to avoid legal issues, you can just enlarge the image area and set the text just below the initial image area.

doing that, you do not alter the image content still having a trace of your own inside the image file !

gamex · 03-31-2005, 10:25 AM

Originally Posted by picobello

to avoid legal issues, you can just enlarge the image area and set the text just below the initial image area.

doing that, you do not alter the image content still having a trace of your own inside the image file !

Yea, thats a good idea too. This way you can be sure your watermark shows up. Otherwise if someone uploads a picture that is the same color as your watermark, it wont show up. There is a way around that, I just dont remember how off the top of my head.

03-31-2005, 04:09 AM	THREAD STARTER #1 (permalink)
joeorgasmic NamePros Regular Join Date: Sep 2004 Location: Earth Posts: 394	watermark on upload I'm starting a free image hosting site and I'm looking for a script that can add a small watermark (that displays link to my site) to each image when the user uploads it. Any suggestions?

03-31-2005, 05:07 AM	#2 (permalink)
luxinterior Senior Member Join Date: Jul 2004 Location: Kizmiaz Posts: 1,091	I'm sure you can find something over at hotscript.com but I'm just wondering about the legality of watermaking somebody elses pictures. Just something to consider. Lux __________________ 1 Cent Web Hosting @ Online HostGatorVoucher.com Adsense Hack for Vbulletin - Fully 3.6 Compatible ForexArea.com Free E-Course in Programming EA's

03-31-2005, 05:28 AM	#3 (permalink)
gamex NamePros Regular Join Date: Feb 2004 Location: Student @ UConn Posts: 411	I used something like this: PHP Code: $watermark = "path/to/watermark/image.png"; $quality = "80"; $imagedir = "path/to/graphics/"; $workingdir = opendir ($imagedir); while ($entry = readdir($workingdir)) { if(eregi(".+\.jpe?g$", $entry )) { $i=1; watermark($imagedir."/".$entry, $entry, $watermark, $quality); $i++; } } function watermark($srcfilename, $newname, $watermark, $quality) { $imageInfo = getimagesize($srcfilename); $width = $imageInfo[0]; $height = $imageInfo[1]; $logoinfo = getimagesize($watermark); $logowidth = $logoinfo[0]; $logoheight = $logoinfo[1]; $horizextra =$width - $logowidth; $vertextra =$height - $logoheight; $horizmargin = round($horizextra / 2); $vertmargin = round($vertextra / 2); $photoImage = ImageCreateFromJPEG($srcfilename); ????: NamePros.com http://www.namepros.com/programming/79125-watermark-on-upload.html ImageAlphaBlending($photoImage, true); $logoImage = ImageCreateFromPNG($watermark); $logoW = ImageSX($logoImage); $logoH = ImageSY($logoImage); ImageCopy($photoImage, $logoImage, $horizmargin, $vertmargin, 0, 0, $logoW, $logoH); ????: NamePros.com http://www.namepros.com/showthread.php?t=79125 //ImageJPEG($photoImage); // output to browser ImageJPEG($photoImage,"images/watermarked/wm_".$newname, $quality); ImageDestroy($photoImage); ImageDestroy($logoImage); } I used this code on my site a while ago. This code will actually add the water mark to all of the images in a directory. You can change the line of code that reads the directory to something that uploads the file. __________________ Joe

03-31-2005, 05:52 AM	#4 (permalink)
redhippo NamePros Expert Join Date: Oct 2003 Location: ANForum Posts: 5,218	great code Joe! __________________ \|www.vb-skins.com\|- Quality Premade Vbulletin skins for Your VB forum makeover \|www.Banjir.com\|-Free image hosting?[B]For Sale!\|AlphaScripts\|Money Generating Scripts FREE VB Skins

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03-31-2005, 07:22 AM	#5 (permalink)
Mystic Account Closed Join Date: Feb 2005 Location: England Posts: 1,169	and about the legality of adding a watermark, put it in the terms and conditions

03-31-2005, 07:30 AM	#6 (permalink)
picobello NamePros Regular Join Date: Dec 2004 Posts: 299	to avoid legal issues, you can just enlarge the image area and set the text just below the initial image area. doing that, you do not alter the image content still having a trace of your own inside the image file !

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