1080i to 1080p (Score 1)

The artical assumes 1080i to 1080p conversion is a lossless process. It is not always straightforward. 1080i from non-progressive sources has iterlacing which is clearly noticeable when directly converted to progressive by merging odd and even lines. It makes more sense to drop the odd or even lines when converting to 720p than bothering to de-interlace using some image processing techniques. Any de-interlacing technique softens the image and in my experience is worse of than reducing the vertical resolution by half.