The two quotes below discuss the same topic.
Terry's tortured season took a surreal twist on Tuesday when a blurry image resembling him appeared on cigarette packets in India. GUARDIAN
A blurred picture closely resembling the 31-year-old appears above a "smoking kills" slogan. CNN
The definition of blurry and blurred is very identical whereupon blurred has an extended definition. From OALD:
without a clear outline; not clear
1 not clear; without a clear outline or shape
2 difficult to remember clearly
3 difficult to distinguish, so that differences are not clear
I think that blurry is a derivative of the noun blur while blurred stems from the verb blur. But I wonder why there exists two forms. I tried to find other words where derivatives of both noun and verb with seemingly the same meaning exists to compare their meanings but I didn't find any. Those words which came to my mind have in my opinion a distinction. For instance, washed and washy.
Even though the quotes from the articles give the appearance that they are identical, is there any subtle distinction between blurry and blurred or are they interchangeable without changing any connotation?