Unpacking boot image

The boot images can be unpacked using a tool called mkbootimg.

unpackbootimg -i boot.img -o ./extracted

Super image

Super image is a sparse image. Need to convert it to a raw image first.
To do that use this tool called simg2img.

simg2img <sparse_image_file> <raw_image_file>

Now that we have the raw super image. lpunpack can be used to extract individual images out of the super image.

lpunpack --partition=system_a super.img.raw