I was looking at STAR5000.BMP too and came to the same conclusion that it may be some type of RLE compression.
You'll notice that after the 8 byte header, there is a byte followed by a 00. Now to figure out the relation.
The image size is 8x8, so that's 64 pixels.
If it's 8 bits per pixel(Assumption), then we can assume the decompressed filesize will be 64 bytes then, right?
Oh, and that 00 04 is the image filesize, btw. The two bytes after that appear to be related to image type or compression.
Usually a 0x03 or 0x04 that I've noticed. It's 00s in the PUYRN_01.BMP file because it's not compressed.
You'll notice that after the 8 byte header, there is a byte followed by a 00. Now to figure out the relation.
The image size is 8x8, so that's 64 pixels.
If it's 8 bits per pixel(Assumption), then we can assume the decompressed filesize will be 64 bytes then, right?
Oh, and that 00 04 is the image filesize, btw. The two bytes after that appear to be related to image type or compression.
Usually a 0x03 or 0x04 that I've noticed. It's 00s in the PUYRN_01.BMP file because it's not compressed.