Abstract: In structured light geometry reconstruction, as the projecting modes and lighting conditions are complex and changeful, detail information in dark areas are usually lost in the result images.An improved Retinex algorithm are proposed based on HSV color space with color restoration and color saturation correction strategy.According to the requirement of color retain, the algorithm includes following steps.Firstly, an input color image is converted from RGB color space into HSV color space.Then the traditional multi-scale Retinex algorithm is applied only to V-component through the analysis of HSV color space model.At the same time, the coefficient of correlation is used to adaptively adjust the S-component base in the enhancement of V-component.Finally by transforming HSI model into RGB model, the enhanced color image with color restoration is obtained.Experimental results show that, the algorithm used in structured light stripe image enhancement, the color of the structured light image is maintained and the detail information is enhanced very well, which is more favorable to follow-up stripe information extraction and automatic coding.