Fig. 1. Camera response function curve

Fig. 2. Response curve of camera for a single exposure

Fig. 3. Exposure time versus mean value of corrected pixel

Fig. 4. Otsu split. (a) Original image; (b) binary image after splitting; (c) measured object after splitting

Fig. 5. Measured object in auto exposure mode (grayscale expectation is 50)

Fig. 6. Histogram of the measured object image

Fig. 7. Structured light encoded images acquired in different ways. (a) Auto exposure mode; (b) optimal exposure

Fig. 8. Image sets of wooden model with exposure times of 0.05‒0.30 s

Fig. 9. Camera response curve for a single exposure of wooden model

Fig. 10. Mean pixel value of corrected wooden model image versus exposure time

Fig. 11. Otsu image segmentation. (a) Measured object image acquired at the optimal exposure time; (b) segmented image by Otsu

Fig. 12. Histogram of wooden model image (I_result=0.1893 s)

Fig. 13. Camera response curve with the measured object being the automotive brake pedal joint ball

Fig. 14. Otsu image segmentation. (a) Measured object image acquired at the optimal exposure time; (b) segmented image by Otsu

Fig. 15. Histogram of joint sphere image (I_result=0.2217 s)

Fig. 16. Binocular structured light measurement system

Fig. 17. Reconstruction model and results of automotive brake pedal joint ball. (a) 3D reconstruction model; (b) spherical fitting with fitted data