News Feed
Sections




News Archive
Looking for more information on how to do PHP the right way? Check out PHP: The Right Way

Mikko Koppanen's Blog:
Choosing watermark color based on the background luminosity
October 13, 2007 @ 16:04:00

Mikko Koppanen has another blog entry posted dealing with image manipulation with PHP and Imagick, this time it's a cool little script that lets you pick your watermark's color based on the image's background luminosity.

Usually images are watermarked using a predefined color (let's say for example "white"). How well does this actually work when you're doing the watermark on a light or even a white image? The answer is simple: not very well.

His example uses the ImagickPixelIterator to check the luminosity of the background and assigns the text a value between black and white according to the background. Complete code with usage and examples of the resulting images are included.

0 comments voice your opinion now!
imagick watermark color background luminosity imagick watermark color background luminosity


blog comments powered by Disqus

Similar Posts

Hasin Hayder's Blog: Installing Imagick extension for PHP in Ubuntu 7.10

AnyExample.com: Convert RGB from/to HTML hex color

Mikko Koppanen's Blog: Creating buttons with Imagick

Mikko Koppanen's Blog: Creating a reflection

Wez Furlong's Blog: Background/batch/workflow processing with PDO::PGSQL


Community Events





Don't see your event here?
Let us know!


introduction threedevsandamaybe release unittest laravel api language framework interview community symfony2 refactor podcast testing opinion install series code developer list

All content copyright, 2014 PHPDeveloper.org :: info@phpdeveloper.org - Powered by the Solar PHP Framework