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in Oracle Multimedia there exist Histogram objects, you can find description in de Reference guide: http://download.oracle.com/docs/cd/E11882_01/appdev.112/e10776/ap_stimgref.htm#CHDICDFB. I don't have experience with them, but it can be a starting point.
Herald ten Dam
hello and thank you for your answer.
I have already seen the oracle multimediia.. What i want to do is a custom procedure for color histograms and how to compare them with the Euclidean distance.. Maybe someone has already done that? The Euclidean distance in a procedure..
Sorry for my english.
A custom procedure can be easily written using PL/SQL if the color histograms are stored using the SI_ColorHistogram object type.