Convert pnm to icb

What is the difference between .pnm and .icb?

Description: The PNM (Portable Any Map Image) file format is a subset of the broader Netpbm format, designed for storing various types of digital images. It acts as an umbrella term for three specific types of grayscale, color, and black-and-white images, represented by PBM (Portable Bitmap), PGM (Portable Graymap), and PPM (Portable Pixmap) formats respectively. PNM files are known for their simplicity and ease of conversion to other image formats.; The ICB file format, standing for Targa ICB Bitmap Image, is a type of image file associated with the Targa (Truevision Advanced Raster Graphics Adapter) image format. Targa files, including ICB, are known for their versatility in handling various types of digital images, including color, grayscale, and monochrome. The ICB variant is part of a broader family of Targa formats, which are often used in professional environments for digital video editing, animation, and graphic design.