询问扫描pdf字迹不清晰的解决方法

我找到的应该和读秀的是同一本,差不多的淡;https://img.duxiu.com/n/jpgfs/book/base/14076146/f87e8219319742d4b428c4f3ffee2a2a/6ccc58ebf7211c1c3287ede11442c61e.shtml?uf=1&t=5&time=2022102107&url=http%3A%2F%2Fbook.dglib.superlib.net%2FbookDetail.jsp%3FdxNumber%3D000015822453%26d%3D9374A87C94CDFCBEA3193A1C02695ABC%26timestr%3D1666308033659%26t%3D5%26rtype%3D1
现在黑白文字处理之后,又出现了另一个问题:joy: