Convert VICAR to PNM

The VICAR (Video Image Communication and Retrieval) file extension is a specialized raster image format developed by NASA's Jet Propulsion Laboratory in 1966 to manage and process imaging data from unmanned planetary missions. It supports multi-dimensional scientific data, including spectroscopic, hyperspectral, and radar imagery, making it suitable for space exploration, biomedical imaging, and geological studies. The format includes metadata for data integrity and usability, and the software system is now open-source.

The PNM (Portable Anymap) file extension, developed by Jef Poskanzer in the 1980s, stands for Portable Any Map. It is an uncompressed raster graphics format designed for portable image storage and exchange, encompassing three sub-formats: PBM (Portable Bitmap), PGM (Portable Graymap), and PPM (Portable Pixmap). PNM files store image data in plain text or binary format, ensuring easy usage across different platforms and applications. This format is widely supported by various image editing software and is valued for its simplicity and lossless compression.