Glasses-free three-dimensional (3D) display technology enables viewers to see stereoscopic images without visual aids, which is a focus of 3D display research. At present, the lack of image quality assessment methods for 3D display seriously restricts the development of light field display and content generation. In this study, objective evaluation metrics for crosstalk of glasses-free 3D display are proposed, considering the information reuse caused by the similar color values between adjacent pixels. The experimental results show that the correlation coefficient between the proposed metrics and subjective evaluation values is higher than 88%, indicating that the proposed metrics can detect the crosstalk perceived by the human eye.