Issue with outlines

[daftinquisitor]

So, ran into an odd little issue when trying to upscale a few images. It's a profile image for a character for a video game, and it has the headshot itself with a transparent background (so it can overlay it into the game without a set background image). Well, I think the transparency has something to do with why it isn't able to properly work with the outer edge of the image. See here for example, original image is above (basic upscaling with paint.net) with the Waifu'd image below.

http://i.imgur.com/YFQTrLk.png

Aside from the edge issues though, it looks absolutely phenomenal, so great work with the application overall!

EDIT: Well, the transparency had nothing to do with it. I just added a simple white background to the original image when testing, and I still got the absurdly pixelated outer edge.

[nagadomi]

I think that is a issue of the source image.

• apply anti-aliasing or gaussian blur filter to the transparency channel before resizing.
• or retouch the image after resizing.