Rapid Automatic Lighting Control of a Mixed Light Source for Image Acquisition using Derivative Optimum Search MethodsHyungTae Kim, KyeongYong Cho, SeungTaek Kim, Jongseok Kim, KyungChan Jin and SungHo LeeMATEC Web of Conferences, 32 (2015) 07004DOI: https://doi.org/10.1051/matecconf/20153207004