This paper describes RIME (Replicated IMage dEtector), an alternative
approach to watermarking for detecting unauthorized image copying on
the Internet. RIME profiles internet images and stores
the feature vectors of the images and their URLs in its repository.
When a copy detection request is received, RIME matches the requested
image's feature vector with the vectors stored in the repository and returns
a list of suspect URLs.  RIME characterizes each image using Daubechies' 
wavelets.  The 
wavelet coefficients
are stored as the feature vector. 
RIME uses a multidimensional extensible hashing scheme 
to index these high-dimensional feature vectors. 
Our preliminary result shows that it can detect
image copies effectively: It can
find the top suspects and copes well with
image format conversion, resampling, and requantization.