Not exactly. Coordinate regression of human posture estimation is not a classification problem. Classification problem refers to the classification of data into different categories. For example, binary classification problem divides data into positive and negative categories, and multi-classification problem divides data into multiple different categories. Coordinate regression of human posture estimation refers to predicting a continuous numerical output by inputting a set of feature vectors, such as the coordinate position of human joints. Therefore, the coordinate regression of human posture estimation is a regression problem, not a classification problem.