Re: [PHP] Invisible watermarking / GD2

On Sunday 01 August 2004 07:10, Joseph Hill wrote: > I use GD for stamping images with a visible watermark - in this case, a > text string and a tracking number appended to the bottom of each image. > > However, I'd like to embed tracking information (I sometimes see my pics > crop up on mailing l

[PHP] Invisible watermarking / GD2

Hi I use GD for stamping images with a visible watermark - in this case, a text string and a tracking number appended to the bottom of each image. However, I'd like to embed tracking information (I sometimes see my pics crop up on mailing lists... And they're the ones I see copied!) into the pict