Files
tldr/pages.zh/common/pamditherbw.md

21 lines
826 B
Markdown
Raw Permalink Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

# pamditherbw
> 对灰度图像应用抖动处理,即将其转换为一组黑白像素的图案,看起来与原始灰度图像相同。
> 另见:`pbmreduce`。
> 更多信息:<https://netpbm.sourceforge.net/doc/pamditherbw.html>。
- 读取PGM图像应用抖动并保存到文件
`ppmditherbw {{path/to/image.pgm}} > {{path/to/file.pgm}}`
- 使用指定的量化方法:
`ppmditherbw -{{floyd|fs|atkinson|threshold|hilbert|...}} {{path/to/image.pgm}} > {{path/to/file.pgm}}`
- 使用Atkinson量化方法和指定的伪随机数生成器的种子
`ppmditherbw -atkinson -randomseed {{1337}} {{path/to/image.pgm}} > {{path/to/file.pgm}}`
- 为执行某种阈值处理的量化方法指定阈值:
`ppmditherbw -{{fs|atkinson|thresholding}} -value {{0.3}} {{path/to/image.pgm}} > {{path/to/file.pgm}}`