Experiment #1a
Perceived shadows quality vs. masking by texture
On this page you will see seven pairs of images. Compare the
left image with the right image for each pair, judging on a scale
from 1 to 9 how similar they appear to be. If they are very similar
to each other, assign the grade "1" to the pair of images. If they
are very different from each other, assign the grade "9" to the pair.
NOTE:
The same grades can be assigned to multiple pairs of images!