How to use the command ppmtoppm (with examples)

The ppmtoppm command is used to convert a PPM image, which can be a PBM (Portable BitMap), PGM (Portable GrayMap), or PPM (Portable PixMap), to another PPM image. It allows copying a PPM image from stdin to stdout or displaying the version information.

Use case 1: Copy a PPM image from stdin to stdout

Code:

ppmtoppm < path/to/image.ppm > path/to/output.ppm

Motivation: Sometimes, you may need to copy a PPM image to another location or save it with a different name. This use case allows you to perform the copying operation.

Explanation:

• ppmtoppm: The command itself.
• < path/to/image.ppm: Specifies the path to the input PPM image file. Replace path/to/image.ppm with the actual file path.
• > path/to/output.ppm: Specifies the path to the output PPM image file. Replace path/to/output.ppm with the desired output file path.

Example output: This command will read the input PPM image from path/to/image.ppm and write the copied image to path/to/output.ppm.

Use case 2: Display version

Code:

ppmtoppm -version

Motivation: It may be necessary to check the version of the ppmtoppm command to ensure compatibility or troubleshoot issues with the specific version.

Explanation:

• ppmtoppm: The command itself.
• -version: A command-line argument that instructs the ppmtoppm command to display the version information.

Example output: Running this command will display the version information of the ppmtoppm command.

Conclusion:

The ppmtoppm command is a versatile tool for copying PPM images and displaying version information. It allows you to copy a PPM image from stdin to stdout and specify the output file path. Additionally, it provides a simple way to check the version of the ppmtoppm command.