To protect the copyright of image, non-watermark algorithm constructs marking meaning watermark by the characteristic structure of image instead of embeddings watermark by altering the data of image.

The invention realizes the split-screen display of the court trial data by converting the acquired non-image data into the court trail data and displaying the image data in a split screen way.

The experiment results indicate that, compared with the method using the frequency-spectrum data of non-main direction data, the improved method ameliorates the restoration effect of the blur image.