Fig. 1. Algorithm flow diagram

Fig. 2. Improved ShuffleNetV2 with two blocks

Fig. 3. Flow diagram of proxy test behavior detection

Fig. 4. Schematic of lip area modeling

Fig. 5. Schematic of head pose modeling

Fig. 6. Annotation process and partial images

Fig. 7. Examination results for unrelated personnel and items

Fig. 8. Test results of candidate substitution

Fig. 9. Test results of candidates' speaking detection

Fig. 10. Test results of examinees' attention drift detection