As for the picture requirements of paper duplicate checking, it mainly includes the following aspects: picture quality, picture format and picture size. First of all, the rechecked pictures must be clearly visible, and the pixels should not be less than 300dpi to ensure the clarity and accuracy of the required information. Secondly, the duplicate checking pictures in this paper must adopt common picture formats, such as JPG, PNG or PDF, so as to facilitate the reading and identification of the duplicate checking system. Secondly, the picture should be informative. In the process of duplicate checking, the algorithm will detect the repetition of the text and display the content of the repeated part. Therefore, images need to contain enough information, including text and format, so that tools can accurately identify and compare text. Finally, the size of the double-check picture must be less than 5MB to prevent the system from crashing or running slowly.

In order to better protect academic integrity, many schools have introduced repeated inspection systems, such as HowNet or paperfree. Through these systems, students can easily check whether their papers are similar to other documents. At the same time, it can also help students identify possible plagiarism, thus improving academic integrity and academic level.