Fig. 1. Schematic of the extendable surface measurement system based on color-encoded fringe projection and stereoscopic line-scan cameras

Fig. 2. Color composite fringe after binary dithering

Fig. 3. Measurement model of stereoscopic line-scan cameras

Fig. 4. Red image captured by RGB line-scan camera and separated three-channel images

Fig. 5. Experimental setup of the extendable surface measurement system

Fig. 6. Intensity of a captured image of a row in the blue image. (a) Before crosstalk compensation; (b) after crosstalk compensation

Fig. 7. One of the sinusoidal fringe images extracted from a single channel. (a) Before crosstalk compensation; (b) after crosstalk compensation

Fig. 8. Point cloud of ceramic plate

Fig. 9. Double-sphere model and measurement result. (a) The model; (b) stitched image by the line-scan camera; (c) point cloud of the model

Fig. 10. Distance between the center of the fitted spheres of point cloud

Fig. 11. Measurement results of the standard balls of the double-sphere model

Fig. 12. Measurement results of the top of the standard balls of the double-sphere model

Fig. 13. The router

Fig. 14. Images of the router obtained by left and right cameras

Fig. 15. Point cloud and details of the router. (a) Point cloud with texture; (b) heat map point cloud reflecting height information

Fig. 16. Metal workpiece. (a) Photo of the object; (b) point cloud measurement result

Fig. 17. Measurement point cloud and standard point cloud of metal workpiece. (a) Before registration; (b) after registration