An apparatus, comprising: a camera unit ; one or more processing elements configured to: determine a pseudo-random sequence of image capture modes for a plurality of groups of image captures, wherein each group includes at least a capture using a first illumination mode and a capture using a second illumination mode, wherein the first and second illumination modes use different illuminators of the camera unit, wherein the ordering of the first and second illumination modes for each group is pseudo-randomly determined and wherein the first illumination mode uses flood illumination and the second illumination mode uses multiple discrete points of illumination and each group is a pair of captures using the first illumination mode and the second illumination mode; receive image information for a set of image captures, wherein the image information is indicated as being captured by the camera unit; determine whether to authorize facial recognition in response to analyzing the image information and determining whether the image information was captured using the pseudo-random sequence of image capture modes. a camera unit ; one or more processing elements configured to: determine a pseudo-random sequence of image capture modes for a plurality of groups of image captures, wherein each group includes at least a capture using a first illumination mode and a capture using a second illumination mode, wherein the first and second illumination modes use different illuminators of the camera unit, wherein the ordering of the first and second illumination modes for each group is pseudo-randomly determined and wherein the first illumination mode uses flood illumination and the second illumination mode uses multiple discrete points of illumination and each group is a pair of captures using the first illumination mode and the second illumination mode; receive image information for a set of image captures, wherein the image information is indicated as being captured by the camera unit; determine whether to authorize facial recognition in response to analyzing the image information and determining whether the image information was captured using the pseudo-random sequence of image capture modes. determine a pseudo-random sequence of image capture modes for a plurality of groups of image captures, wherein each group includes at least a capture using a first illumination mode and a capture using a second illumination mode, wherein the first and second illumination modes use different illuminators of the camera unit, wherein the ordering of the first and second illumination modes for each group is pseudo-randomly determined and wherein the first illumination mode uses flood illumination and the second illumination mode uses multiple discrete points of illumination and each group is a pair of captures using the first illumination mode and the second illumination mode; receive image information for a set of image captures, wherein the image information is indicated as being captured by the camera unit; determine whether to authorize facial recognition in response to analyzing the image information and determining whether the image information was captured using the pseudo-random sequence of image capture modes. <EOS>