The diagonal lines of the "W", for example, now show the "stairway" shape characteristic of nearest-neighbor interpolation.
Linear (or bilinear, in two dimensions) interpolation is typically good for changing the size of an image, but causes some undesirable softening of details and can still be somewhat jagged.
[4] A study found that DCCI had the best scores in PSNR and SSIM on a series of test images.
Unfortunately due to the standardized size of 218x80 pixels, the "Wiki" image cannot use HQ4x or 4xBRZ to better demonstrate the artifacts they may produce such as row shifting.
However it will create an effect similar to posterization by grouping together local areas into a single colour.
This technique is used by Adobe Illustrator Live Trace, Inkscape, and several recent papers.
Note that the special characteristics of vectors allow for greater resolution example images.
The upscaled result is sometimes described as a hallucination because the information introduced may not correspond to the content of the source.