kernel-dp-sneseur-release-v2.0.14-0-gd8b65c6.img is the original factory firmware (stock kernel) for the
(where /dev/sdX is the SD card or eMMC)
file kernel-dp-sneseur-release-v2.0.14-0-gd8b65c6.img
binwalk kernel-dp-sneseur-release-v2.0.14-0-gd8b65c6.img