| 摘要 |
A sheet of paper (1) with the image to be checked passes in front of a camera (3) designed to capture three chromatic images and to emit three signals (S1, S2, S3). These signals are introduced into a device (4) applying a function F which comprises coefficients (K1, K2, K3, K10, K20, K30) previously recorded in a suitable device (2). The single signal (5) resulting from the function F is delivered to a device (6) for checking the printing quality.
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