Abstract
A method to evaluate the definition quality of printed matter is developed. A detection pattern has been used, which contains 12 × 12 close-spaced ring cells. The bright-dark ring of each ring cell has a certain spatial frequency and a certain digital contrast. Using digital imaging and its calibration techniques, the optical reflectivity gray image of a printed matter of the detection pattern could be obtained. And using digital imaging processing techniques, the optical reflectivity contrast value of every ring cell and its weighted value by sensitivity of human vision to brightness contrast could be calculated, marked visual brightness contrast Cv, that varies with spatial frequency. Based on this, two quantitative indexes, cut-off frequency Hth and visual definition quality factor Q, are established. The Hth value shows the spatial resolution limit under a certain digital contrast, and the visual definition quality factor Q represents the overall clarity quality of printed image.
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Xu, Y., Wang, H., Zhang, B. (2021). A Detection Method for Definition Quality of Printed Matter. In: Zhao, P., Ye, Z., Xu, M., Yang, L., Zhang, L., Zhu, R. (eds) Advances in Graphic Communication, Printing and Packaging Technology and Materials. Lecture Notes in Electrical Engineering, vol 754. Springer, Singapore. https://doi.org/10.1007/978-981-16-0503-1_26
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DOI: https://doi.org/10.1007/978-981-16-0503-1_26
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