Pressure state evaluation method and system based on skin electric signal Markov transition field

• Main Authors: WANG XINPEI, ZHAO LANJUN, YANG LEI, LIANG XIAO, ZHANG YUNGANG, SUN XUE
• Format: Patent
• Language: Chinese; English
• Published: 06.12.2024
• Subjects: CALCULATING; COMPUTER SYSTEMS BASED ON SPECIFIC COMPUTATIONAL MODELS; COMPUTING; COUNTING; DIAGNOSIS; ELECTRIC DIGITAL DATA PROCESSING; HUMAN NECESSITIES; HYGIENE; IDENTIFICATION; MEDICAL OR VETERINARY SCIENCE; PHYSICS; SURGERY

The invention provides a pressure state evaluation method and system based on a skin electric signal Markov transition field, and relates to the technical field of physiological signal analysis, and the method comprises the steps: obtaining a skin electric signal of a subject; constructing a Markov transition field, and performing graphical conversion on the three-domain sequence of the skin electric signal by using the Markov transition field to convert the three-domain sequence into a gray level image; carrying out coarse graining processing on the grayscale image, extracting texture features of the processed grayscale image, and obtaining image features of a Markov transition field; constructing a feature set according to a feature selection result, and inputting the feature set into a classification model of a support vector machine (SVM) to obtain an evaluation result of the pressure state; wherein the process of constructing the Markov transition field comprises the following steps: determining the numb