The invention discloses an image-based online public opinion
early warning system and a method, and the method comprises the steps that an information obtaining module obtains the theme information and comment information of each topic in a network
community, transmits the theme information to a classification and recognition module, and transmits the comment information to an expression analysismodule; the classification and identification module classifies the images in the theme information to obtain image categories, extracts characters in the images, and sends the image categories, the characters in the images and the characters in the theme information to an early warning and scoring module; the
expression analysis module analyzes the pictures in the comment information to obtain apublic
opinion analysis result of the comment information and sends the public
opinion analysis result to the public opinion early warning module; the early warning and scoring module determines a public opinion
score according to the image category, the characters in the image and the characters in the theme information and sends the public opinion
score to the public opinion early warning module; and the public opinion early warning module determines an
early warning score according to the public
opinion analysis result and the public opinion
score, and sends out early warning. According tothe
system and the method, the public opinion early warning corresponding to the public opinion in the image can be published accurately and quickly.