Fig. 1. Schematic diagram of computational ghost imaging principle

Fig. 2. Illumination patterns of two-dimensional Haar wavelet function.(a)‒(d) Illumination patterns of two-dimensional Haar wavelet function ψj,k0,ψj,k1,ψj,k2,ψj,k3

Fig. 3. Flowchart of the algorithm

Fig. 4. Simulation object. (a) Object information recovery simulation object;(b) direct reconstruction imaging results after missing 5% measurement basis

Fig. 5. Simulation imaging results obtained by using two-dimensional Haar wavelet as illumination pattern. (a) Direct reconstruction imaging results after random extraction of measurement base; (b) simulation imaging results of object information recovery after random removal of measurement base

Fig. 6. Objective evaluation indexes of simulation imaging results obtained by using two-dimensional Haar wavelet as illumination pattern. (a) Structural similarity; (b) root mean square error; (c) correlation coefficient

Fig. 7. Experimental facility for computational ghost imaging. (a) Experimental device diagram for computational ghost imaging; (b) object to be measured

Fig. 8. Experiment imaging results obtained by using two-dimensional Haar wavelet as illumination pattern. (a) Ideal imaging result; (b) direct reconstruction imaging results after random removal of the measurement base; (c) experimental imaging results of object information recovery after random removal of the measurement base

Fig. 9. Objective evaluation indexes of experiment imaging results obtained by using two-dimensional Haar wavelet as illumination pattern. (a) Structural similarity; (b) root mean square error; (c) correlation coefficient

Fig. 10. Simulation object. (a) Object information recovery simulation object;(b) direct reconstruction imaging results after missing 5% measurement basis

Fig. 11. Simulation imaging results obtained by using Hadamard speckle as illumination pattern. (a) Direct reconstruction imaging results after random extraction of measurement base; (b) simulation imaging results of object information recovery after random removal of measurement base

Fig. 12. Objective evaluation index of simulation imaging results obtained by using Hadamard speckle as illumination pattern. (a) Structural similarity; (b) root mean square error; (c) correlation coefficient

Fig. 13. Simulation object

Fig. 14. Comparison of imaging results of three schemes

Fig. 15. Objective evaluation indexes of imaging results of three schemes