Fig. 1. Different lighting sources captured by the camera

Fig. 2. Spectral response curve of CCD camera

Fig. 3. Process of fusion HDR fringe images. (a) Captured color fringe pattern by the camera; (b) Blue channel fringe pattern; (c) Green channel fringe pattern; (d) Mask of the blue channel; (e) Mask of the green channel; (f) Composite HDR image

Fig. 4. Flow chart of synthesizing HDR image

Fig. 5. Hardware of the measurement system

Fig. 6. (a) Photograph of a metal plate; (b) Photograph of a metal spherical part

Fig. 7. Fringe pattern of a metal plate. (a) Blue channel fringe pattern; (b) Composite HDR image

Fig. 8. 3D measurement results of a metal plate. (a) 3D measurement results by blue channel fringe patterns; (b) 3D measurement results by HDR image

Fig. 9. Fringe pattern of a metal spherical part. (a) Blue channel fringe pattern; (b) Composite HDR image

Fig. 10. 3D measurement results of a metal spherical part. (a) 3D measurement results by blue channel fringe patterns; (b) 3D measurement results by HDR image

Fig. 11. (a) Photograph of an artificial standard step; (b) Blue channel fringe pattern; (c) Fringe pattern by Zhang’s method; (d) Composite HDR image

Fig. 12. (a) 3D measurement results of an artificial standard step by blue channel fringe patterns; (b) 3D measurement results of an artificial standard step by Zhang’s method; (c) 3D measurement results of an artificial standard step by HDR image