Can this resize be improved?

[rmagick]

An RMagick user is dissatisfied with the output from -resize. His program is the equivalent of

convert 1.jpeg -resize 200% resize.jpg

Here's the input and output he is getting. Can this output be improved? This is ImageMagick 6.3.6.
Input:

Output:

[magick]

Have the RMagick user review carefully, http://www.imagemagick.org/Usage/resize/#artifacts and http://www.imagemagick.org/Usage/resize/#filter . Have fun.

[rmagick]

Thanks! I've passed along your advice.