https://blog.faceutil.com/2017/04/07/%ec%96%b4%eb%8f%84%eb%b9%84-%ed%8f%ac%ed%86%a0%ec%83%b5-adobe-photoshop-7-0-%ed%95%9c%ea%b8%80%ed%8c%a8%ec%b9%98-n/