Research on climate change based on carbonate porosity analysis in Jinping, China

3. The use of carbonate rock images in climate change research is based on the premise that the distribution characteristics of RGB values and gray values of carbonate rock images are suitable for image analysis karst research. Finite automata are a good model for image anal- ysis of carbonate porosity. The saddle line algorithm is a good finite automaton algorithm. 4. When using carbonate rock images to study climate change, researchers may often encoun- ter a small number of carbonate rock samples. The variation curve of the carbonate rock porosity obtained using the image analysis method can be fitted using a mathematical method. 5. The precondition of using carbonate rock images to study climate change is to obtain the porosity of carbonate rocksaccurately through image analysis technology. In the study of carbonate porosity, saddle line is an ideal image analysis algorithm. Before applying the sad- dle line algorithm to finite automata, the saddle line mapping must be carefully compared. 6. In the study of carbonate porosity, finite automaton is an ideal image analysis model. The threshold values of the gray value and RGB values used by the finite automaton must be carefully selected, and the setting of the threshold values directly affects the accuracy of the climate change curve. 7. In the study of porosity of carbonate rocks, the porosity change curve can be obtained using image analysis models, such as finite automata, to obtain the climate change curve of polar- ized micrographs of carbonate rocks. Polarized micrographs of carbonate rocks are a good

basis for climate change research. 8. The cost of polarizedmicroscopy images of carbonate rocks is not high. Compared with other climate change studies, the research cost of climate change research using polarized light microscopic images of carbonate rocks is significantly lower. Therefore, the research method proposed in this paper can significantly reduce the cost of climate change research. 9. Compared with other climate change research methods, climate change trends can be satis- factorily verified based on the climate change trend obtained using polarized microscope images of carbonate rocks. 10. The gray value curve is often used as the climate change curve in the traditional study of climate change in carbonate rock areas. In this study, the RGB values of polarized micro- scope images of carbonate rocks were used to study the climate change trend using finite automata and saddle line mapping, which is an important innovation of this study. With the help of saddle line mapping, the B value of the polarizing microscope images of car- bonate rocks plays an important role in the study of climate change trends using finite automata. Acknowledgments Fig 1(b) was done by Xiyao Wang. Author Contributions Conceptualization: Honghai Kuang. Data curation: Honghai Kuang. Formal analysis: Honghai Kuang. PLOS ONE Research on climate change based on carbonate porosity analysis in Jinping PLOS ONE | https://doi.org/10.1371/journal.pone.0281630 March 30, 2023 17 / 21