扫描仪的分辨率要高一些,但功能比较单一。在数码相机普及以前,扫描仪是数字图像处理的必备工具。随着数字图像技术的发展和数码相机分辨率的提高,数码相机成为获取数字图像最主要的工具。数码相机可以替代扫描仪完成了大部分以前只有扫描仪才能完成的工作,如可以用数码相机来复制报刊杂志上的图片,但效果不很好,即使是低端的扫描仪也能把高质量 Scanner resolution higher, but the function is relatively simple. Before the popularity of digital cameras, scanners are an essential tool for digital image processing. With the development of digital image technology and the increasing resolution of digital cameras, digital cameras have become the most important tools for obtaining digital images. Digital cameras can replace most of the previous scanners scanner to complete the work can be done, such as digital cameras can be used to copy newspapers and magazines pictures, but the effect is not very good, even low-end scanners can also be high-quality