Linux command
pamscale 命令
趣味
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
Scale to specific size
pamscale -width [800] -height [600] [input.pam] > [output.pam]
Scale by factor
pamscale [0.5] [input.pam] > [half.pam]
Scale preserving aspect ratio
pamscale -xyfit [800] [600] [input.pam] > [output.pam]
Scale width only
pamscale -xsize [800] [input.pam] > [output.pam]
High quality scaling
pamscale -filter=lanczos [0.5] [input.pam] > [output.pam]
说明
pamscale resizes PAM/PNM images using high-quality resampling. It can scale by factor, to specific dimensions, or fit within a bounding box while preserving aspect ratio.
参数
- scale
- Scale factor (0.5 = half).
- -width, -xsize _n_
- Output width.
- -height, -ysize _n_
- Output height.
- -xyfit _w_ _h_
- Fit within box, keep aspect.
- -filter _name_
- Resampling filter.
- -linear
- Linear interpolation.
FAQ
What is the pamscale command used for?
pamscale resizes PAM/PNM images using high-quality resampling. It can scale by factor, to specific dimensions, or fit within a bounding box while preserving aspect ratio.
How do I run a basic pamscale example?
Run `pamscale -width [800] -height [600] [input.pam] > [output.pam]` in a terminal, then adjust file names, paths, flags, or remote targets for your system.
What does scale do in pamscale?
Scale factor (0.5 = half).