When the master's thesis is duplicated, the pictures need not be disassembled. The paper checking system of HowNet can identify the content in the picture, restore it to text by OCR technology, and detect it in the original text. Ordinary pictures will not affect the overall repetition rate of the thesis, so it is not necessary to remove the pictures when we check the master's thesis. Unless you cut some words in the paper into pictures in order to reduce weight, it will be judged as duplication, because it is easier and more accurate to recognize words than patterns.