| component_contrast | Contrast between the two exposure components |
| exposure_em | Fit a two-component exposure model by EM |
| exposure_em_control | Control parameters for exposure-component EM fitting |
| exposure_fit | Fit a two-component exposure model using EM, Marquardt, or both |
| exposure_marquardt_control | Control parameters for direct Marquardt fitting |
| posterior_components | Posterior latent-component probabilities |
| predict.exposure_em_fit | Predict from a fitted exposure model |