Linux command
pnmhistmap 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
Create histogram visualization
pnmhistmap [input.pnm] > [histogram.pgm]
Specify output dimensions
pnmhistmap -width [256] -height [100] [input.pnm] > [histogram.pgm]
说明
pnmhistmap creates a visual histogram image showing the distribution of pixel values in a PNM image. The output is a PNM image where the horizontal axis represents sample values and the vertical axis shows how many pixels have each value. For color images, separate histograms are drawn for each channel. The -width and -height options control the output image dimensions. The -white flag uses a white background instead of the default black, and -verbose prints statistical information about the distribution. Part of the Netpbm toolkit.
参数
- -width _n_
- Output width.
- -height _n_
- Output height.
- -white
- Use white background.
- -verbose
- Print statistics.
FAQ
What is the pnmhistmap command used for?
pnmhistmap creates a visual histogram image showing the distribution of pixel values in a PNM image. The output is a PNM image where the horizontal axis represents sample values and the vertical axis shows how many pixels have each value. For color images, separate histograms are drawn for each channel. The -width and -height options control the output image dimensions. The -white flag uses a white background instead of the default black, and -verbose prints statistical information about the distribution. Part of the Netpbm toolkit.
How do I run a basic pnmhistmap example?
Run `pnmhistmap [input.pnm] > [histogram.pgm]` in a terminal, then adjust file names, paths, flags, or remote targets for your system.
What does -width _n_ do in pnmhistmap?
Output width.