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首页> 外文会议>Conference on Computer Image Analysis in the Study of Art; 20080128-29; San Jose,CA(US) >Image analysis of Renaissance copperplate prints
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Image analysis of Renaissance copperplate prints

机译：文艺复兴时期的铜版画图像分析

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摘要

From the fifteenth to the nineteenth centuries, prints were a common form of visual communication, analogous to photographs. Copperplate prints have many finely engraved black lines which were used to create the illusion of continuous tone. Line densities generally are 100-2000 lines per square centimeter and a print can contain more than a million total engraved lines 20-300 micrometers in width. Because hundreds to thousands of prints were made from a single copperplate over decades, variation among prints can have historical value. The largest variation is plate-related, which is the thinning of lines over successive editions as a result of plate polishing to remove time-accumulated corrosion. Thinning can be quantified with image analysis and used to date undated prints and books containing prints. Print-related variation, such as over-inking of the print, is a smaller but significant source. Image-related variation can introduce bias if images were differentially illuminated or not in focus, but improved imaging technology can limit this variation. The Print Index, the percentage of an area composed of lines, is proposed as a primary measure of variation. Statistical methods also are proposed for comparing and identifying prints in the context of a print database.
机译：从15世纪到19世纪，版画是视觉交流的一种常见形式，类似于照片。铜版印刷品上有许多细刻的黑色线条，这些线条用来营造连续色调的错觉。线密度通常为每平方厘米100-2000条线，印刷品可包含超过一百万条总雕刻线，其宽度为20-300微米。由于数十年来使用一块铜板制作成百上千的印刷品，因此印刷品之间的差异可能具有历史价值。最大的变化是与板有关的，这是由于对板进行抛光以去除时间累积的腐蚀而导致的连续线变薄。稀释可以通过图像分析进行量化，并用于标注未注明日期的印刷品和包含印刷品的书籍的日期。与打印相关的变化（例如打印的墨水过多）是一个较小但重要的来源。如果图像被差异照明或聚焦不清晰，与图像相关的变化会产生偏差，但是改进的成像技术可以限制这种变化。印刷指数是由线组成的面积百分比，被提议作为变化的主要指标。还提出了统计方法，用于在打印数据库的上下文中比较和识别打印。

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