Research on Climate Change Based on Carbonate Pore Analysis in Jinping

In this study, the porosity value of carbonate rock obtained via the image analysis method is studied. The porosity of carbonate rocks is studied using the gray value and red–green–blue (RGB) value of polarized images of carbonate rock slides. Based on comparison of algorithms, the saddle line algorithm is selected to obtain the porosity of the carbonate rocks. The climate change trend in the Jinping area is studied by plotting the porosity value of the carbonate rocks as a curve. By comparing the curve established using the climate change data from published articles, it is found that the B value curve obtained using the saddle line is the closest to the curve established using the climate change data from published articles. To better reflect the climate change trend, a cardioids curve is used to fit the climate change trend curve.