Regex pattern for image (not link)

Can anyone give me the pattern of the regex to get all the local images ONLY. :(
I'm using the code below but it includes the image links.

  Regex rgx = new Regex("[^\\/:*?\"<>|]+\\.(?i)(jpg|png|gif|bmp)", RegexOptions.IgnoreCase);

input:

 http://dl9.glitter-graphics.net/pub/846/846279rr8zhg26y6.gif
 images/strawberries.jpg

output:

 846279rr8zhg26y6.gif
 strawberries.jpg 

I don't want the 846279rr8zhg26y6.gif