Fig. 1. TCSPC method for fluorescence lifetime detection

Fig. 2. Flow chart of the construction of the LSTM neural network model

Fig. 3. Structure of LSTM

Fig. 4. Test results of the same neurons with the different layers

Fig. 5. Test results of the different neurons with the same layers

Fig. 6. The structure of the network

Fig. 7. Histogram of fluorescence lifetime decay

Fig. 8. The restoration results of 32×32 array

Fig. 9. Comparison of CMM，LSM and LSTM retrieval range

Fig. 10. The comparison of array imaging when ${\tau }_{\mathrm{1}}$=5 ns，${\tau }_{\mathrm{2}}$=10 ns，${\tau }_{\mathrm{3}}$=15 ns

Fig. 11. The comparison of array imaging when ${\tau }_{\mathrm{1}}$=40 ns，${\tau }_{\mathrm{2}}$=60 ns，${\tau }_{\mathrm{3}}$=80 ns