Convert icb to sixel

What is the difference between .icb and .sixel?

Description: 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.; Created by Digital Equipment Corporation (DEC), SIXEL is a bitmap image format in an escaped sequence (seen as six pixels high and one pixel wide). You have to convert it into a more accessible format if you don’t have a DEC terminal to view it.