The diagnosis of the nutrient elements in the process of digital image processing is an important application of the tech?nology of digital image processing. This design is based on Android platform, the system mainly includes the processing of the im?age, image preprocessing and fault diagnosis, and the diagnostic results and the push scheme, including the gray image, the image threshold segmentation and the model based on the color RGB model. The image analysis and processing of the color information of ramie leaves can be used to ma...