| 摘要 |
A system of classifying the type of incoming media entering an inkjet or other printing mechanism is provided to identify the media without requiring any special manufacturer markings. The leading edge of the incoming media is optically scanned using a blue-violet light to obtain both diffuse and specular reflectance values. A Fourier transform of these reflectance values generates a spatial frequency signature for the incoming media. The spatial frequency is compared with known values for different types of media to classify the incoming media according to major categories, such as transparencies, glossy photo media, premium paper and plain paper, as well as specific types of media within these categories, such as matte photo premium media and high-gloss photo media. An optimum print mode is selected according to the determined media type to automatically generate outstanding images without unnecessary user intervention. A printing mechanism constructed to implement this method is also provided.
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