See my Wikipedia page. All of my images are released with Creative Commons licensing. Let me know if you use one of my images for something other than the English Wikipedia. Credit, when necessary, should be done by emailing me for details or (or via my website). Feel free to improve, crop, lighten, darken, sharpen, etc. any of my images, and let me know if you do!
It's best to contact me on my Wikipedia talk page.