中山大学-09《数字图像处理》期末考试试题A_v9.pdfVIP

中山大学软件学院 2 0 0 9 级软件工程专业(2011 秋季学期) 《S E - 34 3 数字图像处理》期末试题(A 卷) ( 考试形式： 闭（4 5 分钟）/ 开（ 7 5 分钟） 考试时间 : 共 2 小时 ) 《中山大学授予学士学位工作细则》第六条 警 示 考 试 作 弊 不 授 予 学 士 学 位 方向： 姓名： ______ 学号： 注意：答案一定要写在答卷中，写在本试题卷中不给分。本试卷要和答卷一起交回。 Part I (Close book exam 40 pts) 45min 1. (4 pts) Given an image with size 3×3 as following. Reduce its gray level resolution in half, generate a result image and describe your methods. 1 2 3   4 0 2  5 4 7  2. (6 pts) Consider two pixels p and q in the following figure. Calculate the (a) Euclid distance, (b) city-block distance and (c) chessboard distance between p and q. p      q    3. (6 pts) Give the expression for the set shown shaded in the following figure in terms of sets A , B, and C. 4. (5 pts) Can a typical image display device show any natural color? Why? 5. (6 pts) Consider an image pixel with color [10, 20, 30] in RGB color space. (Assume that the intensity level range of each color channel is [0, 255].) Please 第- 1 -页 / 共4 页 answer the following questions: a) What is the intensity of this pixel? b) What is the saturation of this pixel? c) What is the complement of this pixel? 6. (4 pts) As shown in the following figure. The upper row is the input images, and the bottom row is the output images after a sp