| http://www.w3.org/ns/prov#value | - sequentially reading selected picture elements of said image signal from said memory means in a predetermined sequence, each of the n sample blocks formed from the picture elements of the one picture comprising 1/n picture elements that are sufficient to reconstruct the one picture, where n is an integer equal to 2 or more, and for reading one said image signal from said memory means, each of sai
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