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Digital Image Compression by Outer Product Expansion

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2 Author(s)
O'Leary, D.P. ; Univ. of Maryland, College Park, MD, USA ; Peleg, S.

We approximate a digital image as a sum of outer products dxyTwhere d is a real number but the vectors x and y have elements +1, -1, or 0 only. The expansion gives a least squares approximation. Work is proportional to the number of pixels; reconstruction involves only additions.

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Communications, IEEE Transactions on  (Volume:31 ,  Issue: 3 )