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首页> 外文期刊>Journal of Imaging Science and Technology >Halftone Dot Size Variation In Offset, Electrophotographic, And Flexographic Printing Andits Perception
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Halftone Dot Size Variation In Offset, Electrophotographic, And Flexographic Printing Andits Perception

机译：胶印，电子照相和柔版印刷中的半色调网点尺寸变化及其感知

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In digital halftone technology, dot reproducibility is an important factor because our perception and recognition of an image depend on the characteristics of the printed dot. Halftone dot size variations reproduced by typical printing technologies, such as electrophotography, offset, and flexography, were investigated to determine their dot reproducibility. The investigation found that offset, flexography, and electrophotography can produce halftone dot sizes with a percentage coefficient of variation (%CV) at 8.88, 19.64, and 13.93 consecutively in the highlight image areas (small dot size), while the %CV of halftone dot size variations tend to decrease when the dot size increases in the midtone and shadow image areas. The perception of simulated halftone dot size variations was then studied experimentally under set observation distance and halftone frequency conditions in order to analyze the relation between human perception and halftone dot size variations. It was determined that human perception detects nonuniform halftone image dot patterns when the %CV of the halftone dot size variation is greater than 6.72.
机译：在数字半色调技术中，点的可再现性是重要的因素，因为我们对图像的感知和识别取决于打印点的特性。研究了通过典型的印刷技术（如电子照相，胶版印刷和柔版印刷）复制的半色调网点尺寸变化，以确定其网点再现性。调查发现，胶印，苯胺印刷和电子照相可以在高光图像区域（小点尺寸）连续产生8.88、19.64和13.93的百分比色调系数（％CV）的半色调点尺寸，而半色调的％CV当在中间色调和阴影图像区域中点尺寸增加时，点尺寸变化趋于减小。然后，在设定的观察距离和半色调频率条件下，对模拟的半色调网点尺寸变化的感知进行实验研究，以分析人类感知与半色调网点尺寸变化之间的关系。当半色调点尺寸变化的％CV大于6.72时，确定人类感知检测到不均匀的半色调图像点图案。

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