Convert rpnm to png

What is the difference between .rpnm and .png?

Description: The RPNM file format, standing for "Portable Image," is a variant of the PNM file format used for storing images. It is designed to be a simple, yet flexible format that can accommodate various types of image data, including grayscale, black and white, and color. RPNM files can be easily transferred between different platforms and software applications due to their simplicity and portability. They are often used in applications and situations where minimal processing and compatibility across different systems are crucial.; A PNG file is an image file stored in the Portable Network Graphic (PNG) format. It contains a bitmap of indexed colors and uses lossless compression, similar to a .GIF file but without copyright limitations. PNG files are commonly used to store graphics for web images.