Question : Want to create a transparent image over a photo for web page..

I want to put a repetative image over a photo: I have adobe photoshop 5 at my disposal :
the idea is to put a line and dot repetative image, like a ghost image over the photos...so it would
be lines and dots as if you are viewing a particle and a wave..etc...maybe recommend any free software that would make it easier..

Answer : Want to create a transparent image over a photo for web page..

Hi, here is an answer for The GIMP and the idea is to define a pattern, and then fill the picture with that pattern.

1. How to define pattern: 
1. create new picture (my picture was 10x10) with transparent background (you'll need to click on Advanced options in the Create new picture dialog.
    
2. draw the pattern 
3. save the image as .pat file in your, e.g. C:\Documents and Settings\your_user_name\.gimp-2.6\patterns folder 
4. close the GIMP and open it again (I cannot get the new pattern without that step :-(( ) 
2. use the new pattern over your picture: 
1. open your picture 
2. choose the Bucket Fill Tool, define Pattern Fill as Fill Type, then choose your new pattern and Fill whole selection as Affected area.
    
3. apply the Bucket fill tool. 

Look at my example... You can play with Opacity and Mode in the step 2.2 to get interesting effects.

ee-example-tree-waves.jpg (88 KB) (File Type Details) 

black pattern with transparent background over a photo