Wuhan Construction Engineering Group Co. Ltd. 1 article published in JoVE Engineering Image Recognition and Parameter Analysis of Concrete Vibration State Based on Support Vector Machine Shuai Wang1,2, Aixun Wang2, Xudong Fu1, Keyang Wu2, Tong Lu2 1Wuhan University, 2Wuhan Construction Engineering Group Co. Ltd. The protocol described in this paper utilizes the directional gradient histogram technique to extract the characteristics of concrete image samples under various vibration states. It employs a support vector machine for machine learning, resulting in an image recognition method with minimal training sample requirements and low computer performance demands.