Linux command
pnmcolormap 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
Generate color map with N colors
pnmcolormap [256] [image.ppm] > [colormap.ppm]
Use median cut algorithm
pnmcolormap -center [16] [image.ppm] > [colormap.ppm]
Spread colors evenly
pnmcolormap -spreadluminosity [256] [image.ppm] > [colormap.ppm]
From multiple images
pnmcolormap [256] [image1.ppm] [image2.ppm] > [colormap.ppm]
说明
pnmcolormap creates a color map (palette) from an image using median cut quantization. The output is a small image where each pixel is a color from the palette. Used with pnmremap for color reduction.
参数
- ncolors
- Maximum colors in map.
- -center
- Use center of cluster.
- -meancolor
- Use mean color of cluster.
- -meanpixel
- Use mean weighted by pixel count.
- -spreadbrightness
- Spread by brightness.
- -spreadluminosity
- Spread by luminosity.
FAQ
What is the pnmcolormap command used for?
pnmcolormap creates a color map (palette) from an image using median cut quantization. The output is a small image where each pixel is a color from the palette. Used with pnmremap for color reduction.
How do I run a basic pnmcolormap example?
Run `pnmcolormap [256] [image.ppm] > [colormap.ppm]` in a terminal, then adjust file names, paths, flags, or remote targets for your system.
What does ncolors do in pnmcolormap?
Maximum colors in map.