The invention discloses a no-
reference image quality evaluation method based on a prediction error graph, which is suitable for the field of
image processing, realizes the evaluation of
image quality through a
deep learning model, and comprises the following steps: constructing a prediction error graph pre-training model based on a Transform
encoder and decoder structure; inputting the distorted image into a prediction error graph pre-training model to generate a corresponding prediction error graph: constructing a stepped
feature extraction network based on decomposed large kernel
convolution, performing layer-by-layer
feature extraction on the distorted image, obtaining multi-scale features, and aggregating the multi-scale features to form global features; carrying out element-by-element fusion on the extracted image features and the features of the prediction error graph; and finally, the fused features are mapped into
image quality scores. According to the method, the image
distortion region and the degradation mode thereof are described by introducing the prediction error graph, and the prediction error graph is combined with the multi-scale features, so that the model can fully utilize the
image degradation information, and the accuracy and the stability of no-
reference image quality evaluation are improved.