In order to improve the realism of the simulated scene, weathering the objects of the image is an effective method. Using an image processing method to achieve the fine weathering effect of the objects surface in the image. First of all, use the radial basis function (RBF) method to calculate the weathering degree image. Even if the color of the surface of the object changed greatly, the algorithm could calculate the degree of weathering more accurately. Then, use the image segmentation algorithm to extract the most weathered region as the "weathering exemplar". Finally, the patchmatch image repair algorithm was used to complete the "weathering exemplar", so that the "weathering exemplar" could be propagated seamlessly in the weathering area of the image. The results show that the proposed method can generate various types of weathering effects. Using the method of exemplar propagation can better simulate the weathering image.

At present, most of the main agent of conventional clean fracturing fluids are viscoelastic sixteen (or eighteen) alkyltrimethylammonium chloride, which has poor temperature resistance (generally less than 60 ℃). The quaternary ammonium salt type surfactant (JS-VES) based on high carbon chain erucic acid has good temperature resistance. In this paper, a high-carbon erucic acidtype clean fracturing fluid (mass fraction) (0.80% JS-VES+0.68%NaSal+2.60%KCl+0.40%Na ₂S ₂O ₃) was developed with JSVES as the main agent, and compared with the conventional clean fracturing fluid system performance. The highcarbon erucic acidtype clean fracturing fluid system (25 ℃, 170 s ^-1) has an apparent viscosity of 25 mPa•s. It has good shear resistance, and can meet the requirements of suspended sand in the static suspension of sand, with a good breaking capacity (2 mPa•s) and temperature resistance (80 ℃).