Fig. 1. Schematic of color-encoded PMP

Fig. 2. Standard color image and the parameters of distorted image. (a) Standard color image; (b) distorted color image; (c) intensity of a cross-section of distorted image; (d) phase difference between standard color image and distorted image

Fig. 3. RMS of PDF varying with phase-shift deviations ϑ₂ and ϑ₃

Fig. 4. Correction process of phase-shift deviation

Fig. 5. Measurement system simulation. (a) Object to be measured; (b) standard color sinusoidal grating; (c) modulated grating

Fig. 6. Intensity of 250^th cross-section. (a) Before adjustment; (b) after adjustment

Fig. 7. Phase error comparison of 250^th row

Fig. 8. Measurement results. (a) Reconstructed result of hemisphere surface; (b) comparison of reconstructed results of 250^th cross-section; (c) comparison of reconstructed height difference of 250^th cross-section

Fig. 9. Reconstructed results for color matrix C₂. (a) Modulated image; (b) reconstructed result of hemisphere; (c) comparison of reconstructed results of 250^th cross-section; (d) comparison of reconstructed height difference of 250^th cross-section

Fig. 10. Reference plane fringe patterns of three channels before correction. (a) Captured plane color-encoded fringe pattern; (b) red channel fringe pattern; (c) green channel fringe pattern; (d) blue channel fringe pattern

Fig. 11. Measurement results of a cross-section of reference plane. (a) Gray intensity of three channels before adjustment; (b) gray intensity of three channels after adjustment

Fig. 12. Phase error correction result comparison of a cross-section of reference plane

Fig. 13. Results of color fringe pattern measurement. (a) Ideal phase distribution; (b) phase distribution before correction; (c) phase distribution after intensity correction; (d) phase distribution after phase-shift deviation correction

Fig. 14. Comparison of phase distribution cross-section