Abstract: There are many problems with infrared images, such as low contrast, unclear details, and non-prominent edge features. To solve these problems, this study proposes an adaptive conditional histogram equalization algorithm for infrared image detail enhancement. First, the infrared image is decomposed into background and detail layers by a guided filter. Second, the combined adaptive threshold neighborhood condition histogram and contrast limited histogram equalization method are used to compress and enhance the gray level of the background image. Then a noise mask is constructed using the intermediate calculation results of the guided filter, which can effectively filter the background noise while enhancing the detail layer. Finally, the background and detail layer processing results are linearly fused to obtain a detail-enhanced infrared image. Subjective evaluation and objective data calculation show that the infrared image detail enhancement algorithm proposed in this paper realizes adaptation to various scenes without manual parameter adjustment, and can effectively enhance the image details and improve the overall contrast level of the image under the premise of suppressing noise. Embedded transplantation of the algorithm was performed, and the display effect and resource occupation show that the algorithm has strong engineering application prospects.