Perhaps you should familiarize yourself with the "posting pictures" rules found in the Gallery.

The following from those rules applies to exactly what you have done here:

"Please do not edit and re-upload other people's pictures without their explicit permission. In other words, you may not open someone's topic, download an image, edit it (that includes adjusting settings, cropping, adding/removing visual elements, etc.), re-post it, and say "here is a version of your photo that I like better" unless they specifically ask for it."

Additionally you did this in spite of the request in the poster's sig file:

"Please don't alter my images and post them without my permission"