Fig. 1. Schematic diagram of binary dithering algorithm

Fig. 2. Diagram of error diffusion fringe; (a) Original algorithm fringe; (b) Improved algorithm fringe

Fig. 3. Schematic diagram of algorithm. (a) Traditional Gray-Code method; (b) Complementary Gray-Code method; (c) High frequency complementary Gray-Code method

Fig. 4. High-frequency Gray-Code to restore the normal Gray-Code process

Fig. 5. Unwrapping error experiment. (a) Defocus sine image; (b) Defocus HF Gray-Code image; (c) Unfiltered expanded phase image; (d) Expanded phase image after filtering; (e) Expanded phase jump point image

Fig. 6. Phase error schematic diagram. (a) Separate pixel error; (b) Ajacent pixels error

Fig. 7. Flowchart of the adaptive interpolation filter

Fig. 8. Schematic diagram of phase correction. (a) Separate pixel correction; (b) Ajacent pixels correction

Fig. 9. Contrast test of global illumination resistance. (a) GC image and the binarization image; (b)HF image and the processed binarization image; (c) The point cloud using the combination method of defocus sin fringe and GC; (d) The point cloud using the combination method of defocus sin fringe and HF; (e) The point cloud using the combination method of defocus sin fringe and HF after using adaptive interpolation filtering

Fig. 10. Interior scene reconstruction. (a) Indoor environment point clouds; (b) Partial enlarged drawing