Image recording device, image recording method, and computer program product that adds a fluorescent-whitening-agent onto a recording sheet

An image recording device that records an image on a recording sheet based on input image information, the image recording device comprising:

• an illumination-light-information inputting unit that inputs information of illumination light when the recorded image is observed;
• a whiteness setting unit that sets a whiteness of the recording sheet when the recorded image is observed;
• an addition amount determining unit that determines an amount of fluorescent-whitening-agent to be added to the recording sheet based on the input information of the illumination light and the whiteness that is set;
• and
• a fluorescent-whitening-agent adding unit that adds an amount of fluorescent-whitening-agent onto the recording sheet according to the determined amount of fluorescent-whitening-agent,
• wherein the illumination-light-information inputting unit includes an illumination light measuring unit that measures the illumination light when the recorded image is observed,
• wherein the illumination-light-information inputting unit includes a plurality of the illumination light measuring units and a selection unit that selects one of the plurality of the illumination light measuring units, and
• wherein the selection unit selects an illumination light measuring unit which is closest to an input source of the image information.