Patent ID: 8335442

Claim:
A hard imaging device comprising: an image engine to provide a marking agent upon media to form hard images; and a media sensing system comprising, a plurality of light sources to emit respective light beams at angles with respect to a surface of the sheet of media, wherein a first one of the plurality of light sources is to emit a light beam in a first direction and a second one of the plurality of light sources is to emit a light beam in a second direction, wherein the first direction is perpendicular to the second direction; and a light sensing device to receive light emitted from the plurality of light sources and to provide at least one signal indicative of a direction of grain of the media responsive to the received light, wherein the light sensing device is positioned at a substantially central location with respect to the plurality of light sources and to receive light in a direction that is substantially normal to the sheet of media; and processing circuitry to receive the at least one signal provided by the media sensing system and to control an operation of the hard imaging device using the information indicative of the direction of the grain of the media of the at least one signal.