Fine grained food image recognition based on swin transformer

Fine-grained food image recognition is an important research direction in the field of computer vision and machine learning. However, fine-grained food image recognition faces huge challenges when dealing with foods that vary greatly in shape but belong to the same category or subcategories of that food. To improve this problem, this paper proposes a deep convolution module for obtaining local enhanced feature representation and combines it with the global feature representation obtained from Swin Transformer for deep residual, to obtain a deeper enhanced feature representation. An end-to-end fine-grained food universal classifier was also proposed, which can more accurately extract effective feature information from enhanced feature representations and achieve accurate recognition. Our approach can accurately handle foods with widely different shapes but belonging to the same category and is expected to help people better manage their diet and improve their health. Our models were trained and verified on the public fine-grained food datasets Foodx-251 and UEC Food-256 respectively, where the accuracy of the method on the validation set is 81.07% and 82.77% respectively. Compared with other state-of-the-art self-supervised methods, the method proposed in this paper exhibits higher accuracy in fine-grained food image recognition tasks.