Sender: sylow 西楼 , Board: AsciiArt Title: A simple answer to okey’s question about image preprocessing Sending station: Misty Water and Cloud Thu Jan 11 21:33:38 2007 , forwarded The first thing to explain is that everyone’s b2a method is different. So there is no need to apply it mechanically b2a is a common auxiliary means for processing color block diagrams Pre-process the original image Can play a role in clarifying outlines, etc. There is no need to use advanced drawing software such as photoshop to process the original image. Because the converted ASCII images are all angular. Therefore, you only need to use the mspaint drawing board that comes with Windows. The first is to choose pictures What should a suitable picture look like? I summarize it in three main points 1. The outline and layering are distinct and the difference between color layers is obvious. 2 The picture content is simple and clear without many trivial parts. 3. The theme of the picture can be appropriately cartoonized. Then we use mspaint for preprocessing The main thing is to draw an outer outline First, set a background color, mostly black. Next, process the background color of the parts other than the main body of the picture. I usually use a brush and the straight line tool to outline the edges You can also use the mouse to circle and delete large areas or erase them. Don’t pay too much attention to details when handling Because the difference of a few pixels has little impact on the image transfer process The inner contour is generally not processed In limited circumstances, curve tools can be used to divide part of the boundary. After processing the picture, you can proceed to b2a This can reduce the adjustment work when a certain b2a is reached Remember not to delete the original image Do you still need to refer to the original image for final modification?