FIGURE 2.

Overview of the construction of the dataset and the main processing procedures of the proposed method. (A) Tongue images were captured with standard equipment. (B) Classification of tooth-marked and non-tooth-marked samples to construct the original tongue image dataset. (C) Tongue region was delineated to construct a tongue image dataset. (D) Pre-trained CNN model, fine-tuned WSTDN model with image-level labeled data, and image-level results output. (E) Performance with validation metrics.