Determining codomain relationship measures

A system comprising:

• one or more data processors;
• and
• instructions stored on a computer readable storage medium that when executed by the one or more data processors cause the one or more data processors to perform operations comprising:
• accessing domain data specifying first domains that are used to host web pages and second domains that are used to host images linked to by the web pages;
• for each of the first domains:
• determining a total number of image links on web pages hosted on the first domain, wherein each image link is a link to an image hosted on a second domain;
• identifying second domains hosting images to which image links on web pages hosted on the first domain link;
• for each of the second domains:
• determining a number of image links from web pages hosted on the first domain linking to images hosted on the second domain;
• and
• determining, by one or more data processors, a codomain relationship measure for the first domain and the second domain specifying a measure of relatedness between the first domain and the second domain based at least in part on the number of image links from web pages hosted on the first domain linking to images hosted on the second domain and the total number of image links on web pages hosted on the first domain.

A computer-readable storage medium having instructions stored thereon, which, when executed by one or more data processors, causes the one or more data processors to perform operations comprising:

• accessing domain data specifying first domains that are used to host web pages and second domains that are used to host images linked to by the web pages;
• for each of the first domains:
• determining a total number of image links on web pages hosted on the first domain, wherein each image link is a link to an image hosted on a second domain;
• identifying second domains hosting images to which image links on web pages hosted on the first domain link;
• for each of the second domains:
• determining a number of image links from web pages hosted on the first domain linking to images hosted on the second domain;
• and
• determining, by one or more data processors, a codomain relationship measure for the first domain and the second domain specifying a measure of relatedness between the first domain and the second domain based at least in part on the number of image links from web pages hosted on the first domain linking to images hosted on the second domain and the total number of image links on web pages hosted on the first domain.

A computer-implemented method, comprising:

• accessing domain data specifying first domains that are used to host web pages and second domains that are used to host images linked to by the web pages;
• for each of the first domains:
• identifying second domains hosting images to which image links on web pages hosted on the first domain link;
• for each of the second domains:
• determining a total number of image links linking to images hosted on the second domain;
• determining a first number of image links from web pages hosted on the first domain linking to images hosted on the second domain, wherein the total number of image links is an aggregation of the first number of image links and a second number of image links from web pages hosted on domains, other than the first domain, linking to images hosted on the second domain;
• and
• determining, by one or more data processors, a codomain relationship measure for the first domain and the second domain specifying a measure of relatedness between the first domain and the second domain based at least in part on the first number of image links and the total number of image links.