duplicate image

Hello, I would like to pick the brains of people who have experience in realtering photos so that they look unique compared to the original (through Google search engine eyes) I am sure at this stage that Google can easily detect that a photo has been flipped/mirrored or has a filter applied...

Hi, I am new here, I just want to know can I use wikipedia images in my website / blog. Is there any legal issue or what effect on seo ranking.