1. An apparatus to blend two images, the apparatus comprising: a vector register file having a plurality of vector registers; a vector processing unit coupled to the vector register file, the vector processing unit having a vector look up unit adapted to look up a vector of data items simultaneously, wherein the vector processing unit is configured to load a vector of keys into a vector register in the vector register file, convert the vector of keys into a first vector of blending factors for a first image and a second vector of blending factors for a second image using a plurality of look up tables in the vector look up unit, and compute an image attribute for a blended image using the blending factors.