Image Fusion Algorithm Analysis of Digital Media Technology Based on LDA Model

Digital media technology is playing an increasingly important role in social development, not only as a tool for information dissemination, but also as an indispensable part of human civilization progress and cultural innovation. This paper focuses on the research of LDA model, firstly introduces the general situation of LDA language system based on network in detail, and then analyzes the principle of digital image fusion algorithm in depth, and gives a brief description. In view of the problems in data compression and processing between traditional printing platform and new media technology, this paper puts forward an improvement strategy, adopts image fusion algorithm, builds a model, and tests the performance of the model. The test results show that when the fusion weight is 0, that is, when Image 2 is the main body, the SSIM value is low. When the fusion weight is 1, that is, when Image 1 is the main body, the SSIM value reaches the highest point.