Patent ID: 8582187

Claim:
A controller configured to control an illuminator of a contact-image sensor (CIS) device having sensors and the illuminator, wherein the illuminator is capable of illumination with each of a first color, a second color, and a third color, wherein the sensors are capable of capturing images, and wherein the controller is configured to: cause the illuminator to: illuminate media with the first color for a first period less than one third of a scan period in which a scan line is scanned by the CIS device, the scan period being based on a relative movement between the media and the sensors used to scan the scan line; and illuminate the media with the second color temporally proximate to illuminating the media with the first color, the temporal proximity of the illuminating with the first color and the illuminating with the second color being smaller than one third of the scan period, the illumination effective to enable the sensors to capture images of the media.