nPrevious studies
¨ img tags with defined alt
attribute:
n27.9%[1], 47.7%[2], and 49.4%[2]
¨ Significant images have a defined alt attribute?
n76.9%[3]
nGaps
¨ Some Ignore Image Significance
¨ Some Ignore
Image Importance
n
[1] T. C. Craven. “Some features of alt text associated with images in web pages.”
(Information Research,
Volume 11, 2006).
[2] Luis von
Ahn et al. “Improving accessibility of
the web with a computer game.” (CHI 2006)
[3] Helen Petrie et
al. “Describing images on the web: a survey of current practice and prospects
for the future.” (HCII 2005)