Convert PGM to ISOBRL

The Portable Graymap (PGM) file extension, originating in the late 1980s as part of the Netpbm project, stands for "Portable Gray Map". It serves as a simple, versatile format for grayscale images, enabling easy reading and writing by various programs. Due to its straightforward structure and plain text encoding, it's often used in academic and research settings where ease of parsing and accessibility are crucial. PGM files store grayscale images in a compact, efficient manner, making them an essential tool for image processing tasks.

The ISOBRL file extension is associated with ISO/TR 11548-1 Braille, a standard for encoding 8-dot Braille characters. It is used to store textual documents in a digital format, making it accessible for blind or visually impaired individuals. This standard, established by the International Organization for Standardization (ISO), ensures compatibility across various Braille input and output devices. The ISOBRL format facilitates the exchange of Braille documents in a consistent and standardized manner.