The bicolor sinusoidal fringe patterns are used to depress the effect of zero frequency extension on fundamental frequency component in Fourier transform profilometry.A novel intensitymodulated method is proposed to eliminate the zero frequency component,which can improve the measuring precision and range.Two compounding monochrome fringe patterns with phase difference of π can be obtained by separating color channel of one color image.After calibration of intensity modulation and zero component elimination,the shape is obtained.The feasibility of the algorithm is validated by both theoretical simulation and experiment performance.Compared to the traditional phase shift method to eliminate the zero frequency component,this method has a significant advantage at speed and is suitable for realtime measurement of threedimensional objects.