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| 1. 什么是图像？ 1. 什么是数字图像？ 1. 一个数字图像处理系统的组成和处理过程是怎样的？ 1. 数字图像处理可以在哪些领域应用？ 1. 进行数字图像处理需要什么工具？ == 什么是图像 == An image may be defined as a two-dimensional function, f(x, y), where x and y are spatial 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 which has a particular location and value. These elements are referred to as picture elements, image elements, pels, and pixels. == 图像上的的值代表什么 == 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 also 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. == 图像处理分为哪些层次 == Low-level processes involve primitive operations such as image preprocessing to reduce noise, contrast enhancement, and image sharpening. A low-level process is characterized by the fact that both its inputs and outputs are images. Mid-level processes on images involve tasks such as segmentation (partitioning an image into regions or objects), description of those objects to reduce them to a form suitable for computer processing, and classification (recognition) of individual objects. A mid-level process is characterized by the fact that its inputs generally are images, but its outputs are attributes extracted from those images(e.g., edges, contours, and the identity of individual objects). High-level processing involves "making sense" of an ensemble of recognized objects, as in image analysis, and at the far end of the continuum, performing the cognitive functions normally associated with human vision. == 数字图像处理是从哪里起源的 == == MATLAB是什么 == MATLAB is a high-performance language for technical computing. It integrates computation, visualization, and programming in an easy-to use environment where problems and solutions are expressed in familiar mathematical notation. The Image Processing Toolbox is a collection of MATLAB functions that extend the capability of the MATLAB environment for the solution of digital image processing problems. |
## page was renamed from 什么是图像处理 1. 什么是图像？什么是数字图像？什么是数字图像处理？ '''图像'''(Image)可以定义为一个二维的函数f(x,y)，x和y是空间坐标，f的值表示图像在该点的强度或者灰度。当x、y和f的值都是有限的、离散的量时，我们称其为'''数字图像'''(Digital Image)。而'''数字图像处理'''(Digital Image Processing)是指用计算机对数字图像进行处理。 1. 图像上那些值表示的是什么？ 数字图像由有限个的元素构成，每个元素都有位置和值的属性，这些元素被称为图像元素，或者叫'''像素'''(Pixel)。 1. 数字图像处理有几个层次？ 数字图像处理可以分为三个层次：低、中、高。低层次图像处理的特点是处理的输入输出都是图像。中层次处理的特点是输入图像，输出特征。高层次处理的特点是模仿人类视觉进行感知。 1. 数字图像处理什么时候起源？ 数字图像处理在哪些领域有应用？ [[attachment:DIP3E_Chapter01_Art.ppt]] 1. 数字图像处理有哪些处理步骤？一个数字图像处理系统有哪些部分组成？ {{attachment:image_system.png}} {{attachment:process_steps.png}} 1. 进行数字图像处理的研究可以使用什么软件工具？ Matlab(Image Processing Toolbox), C/C++(OpenCV、VXL等库) 参看[[熟悉MATLAB环境实验|熟悉MATLAB环境]] |
- 什么是图像？什么是数字图像？什么是数字图像处理？
图像(Image)可以定义为一个二维的函数f(x,y)，x和y是空间坐标，f的值表示图像在该点的强度或者灰度。当x、y和f的值都是有限的、离散的量时，我们称其为数字图像(Digital Image)。而数字图像处理(Digital Image Processing)是指用计算机对数字图像进行处理。
- 图像上那些值表示的是什么？
数字图像由有限个的元素构成，每个元素都有位置和值的属性，这些元素被称为图像元素，或者叫像素(Pixel)。
- 数字图像处理有几个层次？
- 数字图像处理可以分为三个层次：低、中、高。低层次图像处理的特点是处理的输入输出都是图像。中层次处理的特点是输入图像，输出特征。高层次处理的特点是模仿人类视觉进行感知。
- 数字图像处理什么时候起源？ 数字图像处理在哪些领域有应用？
- 数字图像处理有哪些处理步骤？一个数字图像处理系统有哪些部分组成？
- 进行数字图像处理的研究可以使用什么软件工具？
Matlab(Image Processing Toolbox), C/C++(OpenCV、VXL等库) 参看熟悉MATLAB环境
