A 3D reconstruction method and system. The method comprises: performing phase-based relevant stereo matching and mismatching processing on images acquired by a binocular camera under various resolutions; and obtaining the 3D coordinates of each point according to stereo matching results and pre-stored internal and external parameters of the binocular camera, and after processing and colouring, obtaining a 3D model and outputting same. By performing pre-processing on the acquired images and performing stereo matching on same under various resolutions, the relationship between every two resolutions is fully used, thereby ensuring that the judgment and amendment of mismatching are more reasonable, that the finally outputted 3D model is more effective, that being able to output an effective 3D model even when the quality of the acquired images is relatively low, and increase the effect of 3D reconstruction.
3D RECONSTRUCTION METHOD AND SYSTEM