In the episode teaser, whenever The Doctor takes a picture of the crew members, the diaphragm effect is actually a mosaic of Ensign Jetal's face.
The doctor's imaging device was fashioned from a radio control transmitter.
This takes place in 2373 and 2375.
Freeze framing during the first scene where the holographic pictures are being taken, the pictures that are making up the "shutter" are still images of Ensign Kim and Ensign Jetal.