Convert WBMP to PAM

WBMP, or Wireless Bitmap, is a monochrome graphics file format specifically designed for wireless devices, such as mobile phones and PDAs. It was introduced as part of the Wireless Application Protocol (WAP) standard to facilitate the display of simple images on limited display screens of early mobile devices. The format is highly optimized for low-bandwidth environments and supports only black and white colors to minimize data transmission requirements. WBMP files are compact and easy to process, making them ideal for the constrained resources of early wireless communications technology. WBMP played a crucial role in the early days of mobile web browsing by enabling basic graphical content on devices with minimal graphical capabilities.

The PAM (Portable Arbitrary Map) file extension is a versatile bitmap format used primarily in UNIX-based systems. It extends the Portable Any Map (PNM) format, supporting 2-dimensional image data storage in a binary format with an ASCII header. Introduced to enhance flexibility and interoperability in image processing, PAM files are utilized for various graphical applications, offering a standardized method for handling diverse image types. This format's history traces back to the need for a more adaptable and comprehensive bitmap solution within the PNM family.