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.

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 new method exploits the redundancy of information in the image reconstructed from the restored projection data by optimizing non-local weight.