1. A method for computing trap values used in image-processing, said method comprising: for each dimension of an input having at least two input values, quantizing said at least two input values to produce quantized input values indicative of a pair of colors that define a center point of a hypercube that a cached node will represent; combining said quantized input values into a cache lookup using a selected hash function; and providing a lookup via said cache lookup with respect to said cached node utilizing said selected hash function, such that if said cache lookup provides a match, said cached node contains a correct result with respect to a cell center thereby allowing said cached node to be utilized not only for exact input colors but also for nearby colors, thereby increasing a frequency of matches and enhanced efficiency in said color conversion used in image processing.