**5. Conclusions**

This paper proposes a generalized circuit scheme based on the filtering convolution operator and the edge extraction convolution operator to implement image processing applications on the spin memristor crossover to alleviate the storage bottleneck of data-intensive applications. By adopting a self-updating circuit and parallel multi-bit selective adder and convolution algorithm, we implement color image filtering and edge extraction with different operators, and reduce the dependence on data exchange to the lowest level. All the devices used in this paper are compatible with CMOS technology, so the proposed implementation scheme also shows the advantages of large-scale integrated manufacturing. The practicability and excellent performance of this work in image processing have been proved by algorithm simulation.

**Author Contributions:** Conceptualization, S.Z. and Z.D.; methodology, S.Z., Z.D. and L.W.; software, S.Z.; validation, S.Z., Z.D. and L.W.; formal analysis, S.Z. and L.W.; investigation, S.Z.; resources, L.W.; data curation, S.Z. and L.W.; writing–original draft preparation, S.Z.; writing–review and editing, S.Z., Z.D. and L.W.; visualization, S.Z.; supervision, L.W., Z.D. and S.D.; project administration, L.W. and S.D.; funding acquisition, L.W. and S.D. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research was funded by the National Key R&D Program of China (Grant No. 2018YFB1306600), the National Natural Science Foundation of China (Grant Nos.62076207, 62076208), the Fundamental Science and Advanced Technology Research Foundation of Chongqing, China (Grant Nos. cstc2017jcyjBX0050).

**Acknowledgments:** The authors would like to thank the National Key R&D Program of China, the National Natural Science Foundation of China, the Fundamental Science and Advanced Technology Research Foundation of Chongqing, Chongqing Key Laboratory of Nonlinear Circuits and Intelligent Information Processing, School of Electronic Information Engineering, Southwest University, and all the partners (Lidan Wang, Shukai Duan, Zhekang Dong and Chunyan Ren) for their support in the conceptualization and revision of the manuscript.

**Conflicts of Interest:** The authors declare no conflict of interest. The funders support in the collection, analyses or interpretation of data; in the writing of the manuscript, or in the decision to publish the result
