Merger probability distributions for TNG50 synthetic galaxy images predicted using our fine-tuned model. We used ten-fold cross-validation during training for ten independent testing samples to find probabilities for all galaxies, so that each galaxy was given one probability during the process. Each subfigure shows the merger probability distributions for different types of ground-truth mergers. (a) All galaxies, mergers, and non-mergers. (b) Non-mergers, pre-mergers (0.5 Gyr > time until merger > 0 Gyr), and post-mergers (0.5 Gyr > time since merger > 0 Gyr). (c) Non-mergers, major mergers (mass ratio > 1:4), minor mergers (1:4 > mass ratio > 1:10), mini mergers (1:10 > mass ratio > 1:20).