Figure 1. Comparison between our proposed AdcSR and typ-
ical one-step diffusion-based Real-ISR methods. (a) The state-
of-the-art one-step diffusion network OSEDiff [96] employs com-
plete SD [80] models for Real-ISR, suffering from high computa-
tional costs. (b) We distill OSEDiff (ADC-teacher) into a smaller
diffusion-GAN hybrid model, AdcSR (ADC-student), under the
proposed ADC framework, achieving significantly improved effi-
ciency while maintaining competitive recovery performance.