You may be talking about quarks. All I know is that this software can erase handwriting.
Little Ape Search: As a very popular picture search software for primary and secondary school students, Little Ape Search app is rich and comprehensive in content, covering textbooks and related counseling materials from primary school to high school for three years, with knowledge points in textbooks of all major disciplines. Users can take photos and upload pictures through their mobile phones, and make detailed analysis in seconds.
Clear the answers on the test paper by scanning Almighty King or Baidu network disk. Use the scanning universal king: open the scanning universal king, click the home page at the lower left-on the home page, click the test paper at the top-on the test paper page, click Experience Now and take a photo, and it will automatically remove the answer.
If you finish the test paper on your mobile phone, you can cover the answers, but I think you should cover them with your hands a little. Well, that kind of picture processor is also possible.
Little Ape Search is a picture search software specially designed for primary and secondary school students. The software is easy to operate, and you can get the answer by taking photos with your mobile phone.