High Quality Horizontal Scaling

[jpla007]

I need to do a post upscale step on a rendertarget that is 1080p but has an odd horizontal pixel width. I need to upscale to 1920x1080. I am looking for a method that will result in the best quality (while still providing reasonable performance). I tried doing bicubic but this works on both the horizontal and vertical and had the side effect of blurring the image. I assume since I only need to scale horizontally that there could be some tricks that would be fairly fast...any ideas?

Thanks!

 

[AlNom]

How about just cubic interpolation (1D): http://www.paulinternet.nl/?page=bicubic

 

[silent_guy]

A very common resampling filter is the Lanczos filter ( http://en.m.wikipedia.org/wiki/Lanczos_resampling).

Just apply it to the horizontal direction?

 

[jpla007]

Thanks, guys. I am gonna take a look at these.