It's common for photos of Kim released through North Korea state channels to show signs of manipulation, though North Korea officials deny altering images. So it's unusual to receive a pore-level view of the young leader.
Chang Yong Seok, a North Korea expert at Seoul National University, said the North might be trying to sell a more natural and positive image of Kim and his senior officials following the ruling-party congress that ended on Monday.
Analyst Cho Han-bum at the Seoul-based Korea Institute for National Unification said North Korea may want to portray Kim as humble yet confident.
The state-run Korean Central News Agency also released photos of 27 other members of North Korea's top leadership 20 in suits and seven in military uniform.
Kim is the only one grinning, and the only one seen without a lapel pin bearing the faces of his grandfather, national founder Kim II Sung, and father, Kim Jong II.