Introduction_to_Digital_Image_Processing(翻译).docVIP

分数： 仲恺农业工程学院 信息工程专业英语 题目： 班级：通信工程091 姓名： 徐铭璐 学号： 200910324225 Introduction to Digital Image Processing 数字图像处理 7.1 What Is Digital Image Processing? 7.1什么事图像处理 An image may be defined as a two-dimensional function, where x and y are spatial (plane) coordinates, and the amplitude of f at any pair of coordinates (x, y) is called the intensity or gray level of the image at that point. When x, y, and the amplitude values of f are all finite, discrete quantities, we call the image a digital image. The field of digital image processing refers to processing digital images by means of a digital computer. Note that a digital image is composed of a finite number of elements, each of w hich has a particular location and value. These elements are referred to as picture elements, image elements, pels, and pixels. Pixel is the term most widely used to denote the elements of a digital image. 一幅图像可定义为一个二维函数f(x, y)，这里x和y是空间坐标，而在任何一对空间坐标f(x, y)上的幅值f称为该点图像的强度或灰度。当x，y和幅值f为有限的、离散的数值时，称该点是由有限的元素组成的。数字图像处理领域是指利用数字计算机处理的数字图像。没一个元素都有一个特定的位置和幅值。这些元素称为图像元素、画面元素或象素。象素是广泛用于表示数字图像元素的词汇。 Vision is the most advanced of our senses, so it is not surprising that images?play the single most important role in human perception. However, unlike?humans, who are limited to the visual band of the electromagnetic (EM) spectrum,?imaging machines cover almost the entire EM spectrum, ranging from?gamma to radio waves. They can operate on images generated by sources that?humans are not accustomed to associating with images. These include ultrasound,?electron microscopy, and computer-generated images. Thus, digital image?processing encompasses a wide and varied field of applications.? 视觉是人类最高级的感知器官，所以，毫无疑问图像在人类感知中扮演着最重要的角色。然而，人类感知只限于电磁波谱的视觉波段，成像机器则可覆盖几乎全部电磁波谱，从伽马射线到无线电波。它们可以对非人类习惯的那些图像源进行加工，这些图像源包括超声波、电子显微镜及计算机产生的图像。因此，数字图像处理涉及各种各样的应用领域。 There is no general agreement among authors regarding where image processing?stops and other related areas