Taking pictures in North Korea is not as difficult as it used to be. Tourism in the “Democratic People’s Republic of Korea” is now a small source of income that the regime would like to develop. If taking pictures of poverty, soldiers and military equipment or installations is strictly prohibited, guides and officers don’t really control the camera or the pictures you took. They will however pay a constant attention of what you are taking in pictures.
Therefore, if you are technically free to take pictures in North Korea, it is however different for people in uniform. In the PyongYang Army museum (which was renovated recently and is quite similar to the Army museum in Seoul), we were able to take some pictures with the guide. You can also notice the soldier in the background who looks quite curious about the situation.