Method for automatically selecting image compression quality and compressing image

The invention relates to the technical field of electronics and more particularly relates to a method for automatically selecting the image compression quality and compressing an image. The method is characterized by comprising the following steps of A, establishing an image feature database for storing image features, wherein each image feature corresponds to a corresponding compression quality; B, preparing a pre-compressed image: preparing one or more pre-compressed images, extracting and analyzing the image feature of each pre-compressed image; C, searching the compression quality: comparing the image feature of each pre-compressed image with image features stored in the database, and respectively searching an image feature that is closest to the image feature of each pre-compressed image in the database; D, compressing images: according to searched image features, compressing each pre-compressed image according to the corresponding compression quality, and storing the compressed image. According to the t