The above is the source for this image. I'm sorry to say, but saying "credit to respective owners" is sometimes not enough to circumvent trouble with the artist. If the artist had stated "no edits or reproductions", dA could force you to get rid of the image or terminate your account.
In the future, I suggest using SauceNAO.com -- It's a really nice site where all you have to do is upload the original image, hit "enter", and wait for the links to the original image to pop up! Albeit, it only works for anime/manga-esque pictures since it searches databases like Pixiv.
No problem! I just don't want you to get in trouble for something like that. This is why someone went ahead and made a site like SauceNAO -- we can do things to art but still credit the original artist and stuff