I've been working on a program to decompile beat saber levels from the game, and I now need to know how to extract a given cover image from a single spritesheet, I don't have any coordinates for a given image, and I can't generate, or edit any files that I'm using (outside of my own code). All I have is the spritesheet, the name of the song, and a guid that apparently points to the correct image, but I can't find anything that actually proves that, does anyone know how I might get the correct image from the spritesheet?

Each image is 168x168 pixels

My code is in c#