Factors influencing PNG format image size in case of linear geometrical entities

Jiri Horak; Jan Ruzicka; Daniela Szturcova; Jiri Ardielli

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Factors influencing PNG format image size in case of linear geometrical entities

机译：在线性几何实体的情况下影响PNG格式图像大小的因素

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摘要

The research is focused on the study of the impact of the number and the pattern of geometrical entities and colour models in map like drawings upon the file size of PNG format. The extended sample set of PNG images was generated by web map services of 15 European servers. Original images were transformed into different colour models of PNG (RGBA, RGB, Palette, interlaced, non-interlaced) and the differences of file sizes were analysed. Main influencing factors are the colour model, image density, size of lines, anti-aliasing effect and interlacing. The complexity of map drawings can be approximated by the ratio of foreground pixels in an image. In order to minimise files sizes it is recommended to transform images into appropriate palette models, to avoid anti-aliasing changes of transparency and to prefer wide lines.

机译：该研究的重点是研究地图等图形中几何实体和颜色模型的数量和图案对PNG格式文件大小的影响。 PNG图像的扩展样本集是由15家欧洲服务器的网络地图服务生成的。将原始图像转换为不同的PNG颜色模型（RGBA，RGB，调色板，隔行，非隔行），并分析文件大小的差异。主要影响因素是颜色模型，图像密度，线条大小，抗锯齿效果和隔行扫描。地图绘图的复杂性可以通过图像中前景像素的比率来近似。为了最小化文件大小，建议将图像转换为适当的调色板模型，以避免透明性的抗锯齿更改，并且更喜欢宽线条。

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来源
《International journal of intelligent information and database systems》 |2014年第4期|375-389|共15页
作者
Jiri Horak; Jan Ruzicka; Daniela Szturcova; Jiri Ardielli;
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作者单位

VSB Technical University of Ostrava, Institute of Geoinformatics, 17. listopadu 15, 70833, Ostrava Poruba, Czech Republic;

VSB Technical University of Ostrava, Institute of Geoinformatics, 17. listopadu 15, 70833, Ostrava Poruba, Czech Republic;

VSB Technical University of Ostrava, Institute of Geoinformatics, 17. listopadu 15, 70833, Ostrava Poruba, Czech Republic;

Tieto Czech s.r.o., 28. rijna 3346/91, 702 00 Ostrava - Moravska Ostrava, Czech Republic;

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正文语种 eng
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关键词
PNG; file size; geometrical entity; colour model; image analysis;

机译：PNG;文件大小;几何实体颜色模型图像分析;

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Factors influencing PNG format image size in case of linear geometrical entities

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