ikalog/utils/character_recoginizer/character: Threshold the image before finding neighbors.
ikalog/utils/character_recoginizer/character: Threshold the image before finding neighbors.

Signed-off-by: Takeshi HASEGAWA <80595b5c49522665976d35e515d02ac963124d00@gmail.com>

hasegaw/IkaLog,deathmetalland/IkaLog,hrhtspr/IkaLog,hasegaw/IkaLog,hasegaw/IkaLog,deathmetalland/IkaLog,deathmetalland/IkaLog,kshimo69/IkaLog