%0 Journal Article %J Communications, IEEE Transactions on %D 1983 %T Digital Image Compression by Outer Product Expansion %A O'Leary, Dianne P. %A Peleg,S. %K approximation; %K coding; %K image %K Least-squares %K Transform %X We approximate a digital image as a sum of outer products dxyTwheredis a real number but the vectorsxandyhave 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. %B Communications, IEEE Transactions on %V 31 %P 441 - 444 %8 1983/03// %@ 0090-6778 %G eng %N 3 %R 10.1109/TCOM.1983.1095823