enhancer

transitive verb enhanced, enhancing

1. to make greater, as in cost, value, attractiveness, etc.; heighten; augment
2. to improve the quality or condition of
3. to improve electronically the quality or clarity of (a photograph or other image) as by means of a computer

Origin: ME enhauncen < Anglo-Fr enhauncer < OFr enhaucier < VL *inaltiare < in-, en- + *altiare, to raise < L altus, high