digital watermarking library for php

### A php library (php4/php5 compatibile) or extension to digitally watermark images in any current format (jpeg,png,tiff,giff,bmp) To have the best performance the coder should produce a [php extension][1] ** with the required watermarking methods. Skills required:** 1. php coding (object oriented) and C\C++ coding 2. digital signal (2-D image) processing fundamentals 3. watermarking techniques 4. how to develop php extensions 5. UML **Watermark methods and references** [An introduction][2] [Common methods][3] ** **The C library provided here [here][4] can be also used as a porting option. ** Methods to be implemented:** * 2 methods in space domain * 2 methods in wavelet domain * 2 methods in frequency domain The methods to be used will be communicated later. **Documentation produced:** UML documentation + documented comment code **Work evaluation:** Methods implemented will be benchmarked according too parameters: 1. execution performance 2. common watermarks attacks 3. quality of documentation produced **Library to be used: The programmer should use as libraries: **PHP GD for image manipulation: [[login to view URL]<wbr />presentations/GDintro/][5] For encryption\decryption phpmycrypt: <[login to view URL]> Some example code is attached and the LSB method is applied by using a php class on some test image. ## Deliverables The minimum image formats to be supported are the same ones supported by php GD libraries: GIF Support is enabled JPEG Support is enabled PNG Support is enabled WBMP Support is enabled