In view of the lack of image enhancement processing in the traditional methods in image preprocessing, which leads to a long detection time for internal cracks in the image and poor visual effects, an intelligent detection method for internal cracks in aircraft landing gear images under multimedia processing is proposed. A spatial index structure is established based on the multimedia database, and the aircraft landing gear images in the structure are enhanced and denoised. Image segmentation is performed according to the preprocessing results, the crack foreground and the road surface background in the image are separated, and the threshold value of each image is calculated. The threshold segmentation result is used to distinguish which pixels are the areas where the cracks may exist and which pixels belong to the image background, and the judgment result realizes crack detection. The experimental results show that the crack detection time of the proposed method is shorter, the visual effect of the detection results is better, and the average of the expert score reaches 93.6 points, which verifies the effectiveness of the proposed method from both the subjective and objective aspects.

In the context of the implementation of the rural revitalization strategy, the development of the digital economy closely connects with it. The realization of rural revitalization needs to make full use of the advantages of the digital economy to promote the process of rural revitalization. The digital wave is a huge opportunity for the poor to bridge the gap between rich and poor, seize digital opportunities, share digital dividends, achieve sustainable poverty alleviation, and prevent intergenerational transmission of poverty. The article will focus on two aspects of rural e-commerce and mobile payment. Through the discussion of the aspects, this paper gives the suggestion to the government, platforms, enterprises and farmers to work together to promote agricultural development and realize industrial digitalization by using existing resources.