It is not difficult to remove these watermarks. The difficulty lies in how to select these watermarks. I wrote down the detailed steps and ideas. Please don’t hate me if you add the watermark. I’ll apologize here first!
The first step is to select these lines. The conclusion drawn after observation is to "fill" the graph. So we can start here, and we can select these lines by repeating a filling process. First analyze its filling blocks, and after observing them, select a part as follows.
Create a new file and take it out as shown below.
After a little processing, remove the excess part in the lower left corner
Actually the purpose is to select those lines, so I'm going to make a filled line layer that contains transparency. After filling in this way, you can use ctrl+mouse to load the selection and select those lines.
So what I do next is use the color range to select those lines:
After that, deselect to remove the white background and make it transparent. And customize the pattern for this picture.
