Linux command
ppmchange 命令
文本
涉及管道、覆盖或删除，执行前请先确认路径和参数。
常用示例
Change specific color
ppmchange [oldcolor] [newcolor] [input.ppm] > [output.ppm]
Change red to blue
ppmchange red blue [input.ppm] > [output.ppm]
Change multiple colors
ppmchange [old1] [new1] [old2] [new2] [input.ppm] > [output.ppm]
说明
ppmchange replaces specific colors in PPM images with new colors. Multiple color substitutions can be specified in a single invocation by providing pairs of old and new colors on the command line. By default, only exact color matches are replaced. The -closeness option allows fuzzy matching by specifying a tolerance value, useful when working with images that have slight color variations due to compression or anti-aliasing. Part of the Netpbm toolkit.
参数
- -closeness _N_
- Color matching tolerance.
FAQ
What is the ppmchange command used for?
ppmchange replaces specific colors in PPM images with new colors. Multiple color substitutions can be specified in a single invocation by providing pairs of old and new colors on the command line. By default, only exact color matches are replaced. The -closeness option allows fuzzy matching by specifying a tolerance value, useful when working with images that have slight color variations due to compression or anti-aliasing. Part of the Netpbm toolkit.
How do I run a basic ppmchange example?
Run `ppmchange [oldcolor] [newcolor] [input.ppm] > [output.ppm]` in a terminal, then adjust file names, paths, flags, or remote targets for your system.
What does -closeness _N_ do in ppmchange?
Color matching tolerance.