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Meanwhile, the network structure is usually huge, and there are many parameters and consume more space resources, etc. Therefore, the combination of multiple network models to extract complementary features has attracted extensive attention. In order to solve the problems existing in the prior art that the network model can\u2019t extract high spatial depth features, redundant network structure parameters, and weak generalization ability, this paper adopts two models of Xception module and inverted residual structure to build the neural network. Based on this, a face expression recognition method based on improved depthwise separable convolutional network is proposed in the paper. Firstly, Gaussian filtering is performed by Canny operator to remove noise, and combined with two original pixel feature maps to form a three-channel image. Secondly, the inverted residual structure of MobileNetV2 model is introduced into the network structure. Finally, the extracted features are classified by Softmax classifier, and the entire network model uses ReLU6 as the nonlinear activation function. The experimental results show that the recognition rate is 70.76% in Fer2013 dataset (facial expression recognition 2013) and 97.92% in CK+ dataset (extended Cohn Kanade). It can be seen that this method not only effectively mines the deeper and more abstract features of the image, but also prevents network over-fitting and improves the generalization ability.<\/jats:p>","DOI":"10.1007\/s11042-022-14066-6","type":"journal-article","created":{"date-parts":[[2022,11,24]],"date-time":"2022-11-24T19:41:24Z","timestamp":1669318884000},"page":"18635-18652","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":20,"title":["Facial expression recognition based on improved depthwise separable convolutional network"],"prefix":"10.1007","volume":"82","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9545-5443","authenticated-orcid":false,"given":"Hua","family":"Huo","sequence":"first","affiliation":[]},{"given":"YaLi","family":"Yu","sequence":"additional","affiliation":[]},{"given":"ZhongHua","family":"Liu","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2022,11,23]]},"reference":[{"issue":"4","key":"14066_CR1","doi-asserted-by":"publisher","first-page":"632","DOI":"10.1002\/col.22494","volume":"45","author":"SA Abasi","year":"2020","unstructured":"Abasi SA, Tehran M, Fairchild MD (2020) Colour metrics for image edge detection. 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