数字图像处理(双语)期中考试试卷答案

考试试卷(答案)
试卷编号:( )卷课程编号:课程名称:数字图像处理(双语)考试形式:
适用班级:姓名:学号:班级:
学院:信息工程学院专业:电子系各专业考试日期:
一二三四五六七八九十总分累分人
签名题分20 20 20 20 20 0 0 0 0 0 100
得分
考生注意事项:1、本试卷共5页,请查看试卷中是否有缺页或破损。

如有立即举手报告以便更换。

2、考试结束后,考生不得将试卷、答题纸和草稿纸带出考场。

一、基础知识填空题(1,2为单项选择,每空3分,3,4为多项选择,每空2分,共20分),
1 1、When you enter a dark room on a bright day, it takes some time to see well
enough, this is the visual process or visual phenomenon of
A. (Brightness adaptation.)
B. (Brightness discrimination.)
C. (Optical illusion.)
D. (Simultaneous contrast.)
2、The visible spectrum consists of electromagnetic spectrum nearly in the
range of wavelength:
A. (10 – 400 nm)
B. (0.01 – 10 nm)
C. (400 – 700 nm)
D. (700 – 1500 nm)
3、For V = {1}, the subsets S1 and S2are
A. (m-connected)
B. (8-connected )
C. (4-connected)
D. (None of these 3)
4、Two pixels p and q are at the locations shown in the figure, their Euclidean,
city-block and chessboard distances are respectively:
A. D e= ( )
B. D4 = ( 6 )
C. D8 = ( 4 ) 0 0 0 1 2
1 2 7 6 5(p)
3 4 5 6 7
(q) 4 5 6 7 3 得分评阅人
二、空域图像增强题1(Image enhancement in the spatial domain) (20分) Exponential of the form s = T (r ) = 2552
r e α-, 0 ≤ r ≤ 255, with α being a positive constant, are useful for constructing smooth gray-level transformation functions. (1) Start with this basic function and construct transformation functions having the shapes shown in the above figures. (15分) (2) What kind of transformation does the function of (a) approximately
complete for an input of a gray intensity image? (5分) (1) (a)
so
.
(b)
so
得分 评阅人
255 255
255 (b)
(a)
(c)
三、空域图像增强题2(Image enhancement in the spatial domain) (20分)
The White bars in the test pattern shown are 7 pixels wide and 210 pixels high. The separator between bars is 17 pixels. What would this image look like after application of
1. A 3×3 median filter?
2. A 7×7 median filter?
3. A 9×9 median filter?
4. A 15×15 median filter?
( Note: in your answer, quantitative analysis is expected. )
Answer:
The separator between bars is 17 pixels wide > 15, so none of the 4 filters can remove any black pixels. We can treat all black pixels as background.
1. Applying a 3×3 median filter removes the 1 pixel at the top left, top right, bottom left and bottom right locations of each bar, as shown in (a), which is an amplified corner of the filtered
image.
2. Applying a 7×7 median filter remove 6 pixels located at the top left, the top right, the bottom left, the bottom right of each bar, as shown in (b),which is an amplified corner of the median filtered image.
0111110 0001000 3×3 1111111 7×7 01111110 1111111 01111110
3. Applying a 9×9 median filter remove 10 pixels located at the top left, the top right, the bottom left, the bottom right of each bar, as shown in (c). which is an amplified corner of the median filtered image 0000000 9×9 0011100
0111110
4. This time all bars are disappeared.
得分 评阅人
(a)
(b)
(a)。

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数字图像处理题库(87道)

数字图像处理题库(87道)

数字图像处理1、in the hardware peripherals of image processing, which of the following equipments does not belong to the input devices?——[单选题]A Electron cameraB CCD video cameraC Desktop image scannerD Light tape正确答案:D2、The number of bits required to store an 1024*512 image of 4 gray levels is ( )——[单选题]A 256KB 512KC 1MD 2M正确答案:C3、An image of size 1024 × 1024 pixels in which the intensity of each pixel is an8 bit quantity requires the storage space ( if not compressed).——[单选题]A 1 KBB 1 MBC 2 KBD 2 MB正确答案:B4、Intensity range of 8-bit pixel image is () .——[单选题]A 0 to 7B 0 to 15C 0 to 31D 0 to 255正确答案:D5、By its very nature, the appearance of false contours in image is because ( )——[单选题]A the number of gray levels of the image is not enoughB the spatial resolution of the image is not high enoughC the number of gray levels of the image is excessiveD the spatial resolution of the image is too enough正确答案:A6、In the process of image sampling and quantization, the appearance of checkboard effect is because ( )——[单选题]A the number of gray levels of the image is not enoughB the spatial resolution of the image is not high enoughC the number of gray levels of the image is excessiveD the spatial resolution of the image is too enough正确答案:B7、When you enter a dark room on a bright day, it takes some time to see well enough, this is the visual process or visual phenomenon of——[单选题]A Brightness adaptationB Brightness discriminationC Optical illusionD Simultaneous contrast正确答案:A8、Sampling of an image is required for ().——[单选题]A QuantizationB SharpeningC SmoothingD Digitization正确答案:D9、An image function f(x,y) is characterized by f(x,y)=i(x,y)r(x,y) where.——[单选题]A 0<i(x,y)<1&0<r(x,y)<∞B 0<i(x,y)<1&0<r(x,y)<1C 0<i(x,y)<∞&0<r(x,y)<∞D 0<i(x,y)<∞&0<r(x,y)<1正确答案:D10、A pixel p at coordinates (x,y) has four horizontal and vertical neighbours whose coordinates are given by.——[单选题]A (x-1,y-1),(x-1,y),(x,y-1),(x,y+1)B (x+1,y),(x-1,y),(x,y+1),(x,y-1)C (x+1,y-1),(x-1,y),(x-1,y+1),(x,y+1)D (x+1,y-1),(x-1,y),(x,y+1),(x-1,y+1)正确答案:B11、The D4 distance (city distance) between p and q with coordinates (x,y), (s,t) is defined as.——[单选题]ABCD正确答案:A12、Mach bands effect——[单选题]A can be analyzed using simutaneous contrastB depends on the brightness adaptive level of human visual systemC indicates the same fact as simutaneous contrastD indicates that the actual brightness distributions of the bands are influenced by the subjective brightness curve正确答案:C13、The lens focuses light from objects onto the——[单选题]A corneaB retinaC scleraD iris正确答案:B14、The spatial resolution of an image is determined by how ( ) was carried out.——[单选题]A QuantizationB SharpeningC SmoothingD Sampling正确答案:D15、In the human visual system, the perceived intensity of a region is related to the light intensities of the regions surrounding it, this is called ( ).——[单选题]A brightness adaptationB simultaneous contrastC brightness discriminationD optical illusions正确答案:B16、The colours of an object that we perceive are determined by the nature of( ).——[单选题]A the light reflected from the objectB the light shone onto the objectC the light absorbed by the objectD the external light正确答案:A17、The human visual system can perceive approximately different light intensity levelsHowever, at any one time we can only discriminate between a much smaller number,this is indicated in the phenomenon called ( ).——[单选题]A Brightness adaptationB Brightness discriminationC Optical illusionD Simultaneous contrast正确答案:A18、Suppose there is a pixel p at coordinates (x,y), it's diagonal neighbor has four pixels, whose coordinates are given by ( ).——[单选题]A (x-1,y-1),(x-1,y),(x,y-1),(x,y+1)B (x-1,y-1),(x+1,y-1),(x-1,y+1),(x+1,y+1)C (x+1,y-1),(x-1,y),(x-1,y+1),(x,y+1)D (x+1,y-1),(x-1,y),(x,y+1),(x-1,y+1)正确答案:B19、The distance (chessboard distance) between p and q with coordinates (x,y), (s,t) is defined as. ——[单选题]ABCD20、In Matlab, which command can we use to dispaly an image?——[单选题]A imreadB imshowC imhistD imwrite正确答案:B21、In matlab, suppose x=[1 2 3 4;5 6 7 8;9 10 11 12],after run the commandx(:,[2,3])=[];what is the size of x?——[单选题]A 1*4B 3*2C 3*4D 3*3正确答案:B22、In matlab command window, if we run the followong command,what is the result shown in the command window?X=[1 2 3 4;5 6 7 8;9 10 11 12];X(5)——[单选题]A 5B 6C 0D 10正确答案:B23、In Matlab,Suppose x is a 1*6 array,which command can delete the fifth element of x?——[单选题]A delete x(5)B delete x(4)C x(5)=[]D x(4)=[]正确答案:C24、In MATLAB,what is the result of the expression 3~=4?——[单选题]A 1B 0C 7D 1225、In matlab, the command "clear" is used to ( )——[单选题]A Shows the variable in the workspaceB Deletes all variables in the workspaceC clean the command windowD clean the figure window正确答案:B26、In MATLAB,what is the result of x after run the command x=1:2:10?——[单选题]A 1 2 3 4 5 6 7 8 9 10B 1 3 5 7 9 11C 1 3 5 7 9D 2 4 6 8 10正确答案:C27、if x=2.6 ,what is the result of round(x), floor(x), ceil(x) and fix(x)?——[单选题]A 2,2,3,2B 3,2,3,2C 3,2,3,3D 2,2,3,3正确答案:B28、In MATLAB,what is the result of the expression 3==3?——[单选题]A 1B 0C 7D 12正确答案:A29、if x=-2.6 ,what is the result of round(x), floor(x), ceil(x) and fix(x)?——[单选题]A -2,-3,-2,-2B -3,-3,-2,-2C -3,-3,-2,-3D -2,-3,-2,-330、In matlab, the command "save" is used to ( )——[单选题]A Shows the variable in the workspaceB Saves all variables in the workspace to diskC clean the command windowD clean the figure window正确答案:B31、In MATLAB,what is the result of x after run the command x=10:-2:1?——[单选题]A 10 9 8 7 6 5 4 3 2 1B 10 8 6 4 2 0C 10 8 6 4 2D 2 4 6 8 10正确答案:C32、In Matlab, which command can we use to read an image?——[单选题]A imshowB imreadC imhistD imwrite正确答案:B33、In MATLAB, what is the result of a(5) after run these two commands?A=[1 2 3 4];A(6)=6;——[单选题]A 6B 5C 4D 0正确答案:D34、In Matlab,Suppose x is a 2*3 array,which command can delete the 5th elementof x?——[单选题]A delete x(5)B delete x(4)C x(4)=[]D x(5)=[]35、In matlab, suppose x=[1 2 3 4;5 6 7 8;9 10 11 12],after run the commandx([1,3],:)=[];what is the size of x?——[单选题]A 3*2B 1*4C 3*4D 3*3正确答案:B36、In matlab,suppose x is a 3*4 matrix,after run the following command,what is the size of x?X=[1 2 3 4;5 6 7 8;9 10 11 12];Y=x(2,2:4);X=[x,y'];——[单选题]A 3*4B 4*3C 3*5D 5*3正确答案:C37、in Matlab,if we want to display four images in the same figure window as the layout shown in the following,which command do we need to use to display an image in the area 2?——[单选题]A subplot(1,4,2)B subplot(4,1,2)C subplot(2,2,2)D subplot(2,2,3)正确答案:C38、In matlab, suppose x=[1 2 3 4;5 6 7 8;9 10 11 12],after run the commandx=[x;13 14 15 16];what is the size of x?——[单选题]A 3*5B 4*4C 3*4D 3*3正确答案:B39、In Matlab,Suppose x is a 1*6 array,which command can add 3 elements to x?——[单选题]A add x(7:9)B add x(3)C x(9)=10D x(9)=[]正确答案:C40、The corresponding relations between an image and its gray histogram is ( )——[单选题]A one to oneB many-to-oneC one-to-manyD all false正确答案:B41、There is a light ring on the dark background of a gray level image, can be used to make the ring thinner.——[单选题]A Median filterB Max filterC Min filterD Midpoint filter正确答案:C42、In the following four operators, which one belongs to the secondderivative? .——[单选题]A SobelB RobertsC PrewittD Laplacian正确答案:D43、When powerlaw transformation is used to as grayscale transformation,Which type of images as follows can be the transformationPerformed on for enhancement if the power is over 1?——[单选题]A Overall image intensities are on the dark sideB Overall image intensities are on the bright sideC Image details are hidden in the dark backgroundD Images have both too bright and too dark background正确答案:B44、( )can be applied for motion detection.——[单选题]A additionB substactionC multiplicationD division正确答案:B45、In the following four filters, which one belongs to a linear filter?——[单选题]A Median filterB Averaging filterC Max filterD Min filter正确答案:B46、The purpose of compressing dynamic range of image graylevles can be achieved with the help of logarithmic transformation , because ( )——[单选题]A graylevels dynamic range before transformation is larger than that after transformationB only partial range of graylevel values ha been taken after transformationC the ranges of graylevel before and after the transformation are differentD logarithmic transformation curve is monotonically increasing curve正确答案:B47、Logarithmic transform is useful if we wish to enhance details in the ( ) areas of the image, but at the expense of details in the ( ) areas.——[单选题]A dark darkB dark brightC bright darkD bright bright正确答案:B48、The range of intensity change of certain scene image obtained from camera is called ( ),which is the range from the darkest to the brighest in an image.——[单选题]A gray levelB dynamic rangeC spatial resolutionD histogram正确答案:B49、The gray level of an overexposed (washed out) image focuses on ( ) range, while the gray level of an underexposed image focuses on ( ) range.——[单选题]A low-brightness ,low-brightnessB low-brightness ,high-brightnessC high-brightness ,low-brightnessD high-brightness ,high-brightness正确答案:C50、Geometric transformation of images does not change the pixel's( ),but change the pixel's( ).——[单选题]A positon, valueB value,positionC contrast,positionD position, contrast正确答案:B51、Corresponding to different scene contents, digital image can be generally divided into three types, they are ( )——[多选题]A binary imageB gray imageC index imageD color image正确答案:ABD52、Which of the following adjacencies can eliminate ambiguity of path between pixels ( )——[多选题]A 4-adjacencyB 8-adjacencyC m-adjacencyD mixed adjacency正确答案:CD53、Image digitization process consists of two steps——[多选题]A samplingB transformationC quantizationD scanning正确答案:AC54、The retina is covered with light receptors called——[多选题]A rodsB conesC foveaD lens正确答案:AB55、Image digitization process consists of two steps,sampling and quantization. These two steps determine the ( ) and ( ) of an image, respectively.——[多选题]A Spatial resolutionB ResolutionC Intensity level resolutionD Dynamic domain正确答案:AC56、(Single choice)Which adjacency between pixels is the sufficient condition of other types of adjacency ?——[多选题]A 4-adjacencyB 8-adjacencyC m-adjacencyD mixed adjacency正确答案:A57、Three commonly-used neighbors in image processing are( )——[多选题]A 4-neighborsB 8-neighborsC diagonal neighborsD mixed neighbors正确答案:ABC58、MATLAB variable names ( )——[多选题]A must begin with a letterB can contain any combination of letters, numbers and underscore (_C must be unique in the first 31 charactersD can begin with a number正确答案:ABC59、The commonly-used histogram processing methods include ( ) and ( ).——[多选题]A histogram equalizationB histogram adjustmentC histogram specificationD histogram transform正确答案:AC60、The following spatial filters belonged to non-linear filters are ( )——[多选题]A median filterB max filterC min filterD averaging filter正确答案:ABC61、The cone body is mainly located in the middle part of the retina,and is highly sensitive to color. ——[判断题]A 正确B 错误正确答案:A62、The total range of distinct intensity levels the eye can discriminate simultaneously is rather small when compared with the total adaptation range. ——[判断题]A 正确B 错误正确答案:A63、The colours that we perceive are determined by the nature of the light absorbed by an object. ——[判断题]A 正确B 错误64、If a command is followed by a semicolon (;), result of the computation is not shown on the command window.——[判断题]A 正确B 错误正确答案:A65、If a command is followed by a commas (,), result of the computation is not shown on the command window——[判断题]A 正确B 错误正确答案:B66、In command window of Matlab, Ellipsis (…) means continuing on the next line.——[判断题]A 正确B 错误正确答案:A67、MATLAB is case sensitive: “name”, “Name” and “NAME” are consider ed different variables——[判断题]A 正确B 错误正确答案:A68、In Matlab, a two-dimensional matrix is stored in memory in Column major order.——[判断题]A 正确B 错误正确答案:A69、In MATLAB relational operators ,false is represented by 0 and true is represented by 1 (non-zero).——[判断题]A 正确B 错误70、Suppose x is a 3*4 matrix, then a(2,3) is the 8th element of x when in memory.——[判断题]A 正确B 错误正确答案:A71、In Matlab, imshow funtuntion can display images on the screen.——[判断题]A 正确B 错误正确答案:A72、Break statement terminates the execution of a loop and passes the control to the next statement after the end of the loop.——[判断题]A 正确B 错误正确答案:A73、Continue statement terminates the current pass through the loop and returns control to the top of the loop.——[判断题]A 正确B 错误正确答案:A74、In Matlab, the command window can input commands and show the results. ——[判断题]A 正确B 错误正确答案:A75、In the binary image, each pixel value is represented by 1 bit, value 1 represents white and value 0 represents ( )——[填空题]正确答案:black76、Consider the image segment shown .Two pixels p and q are at the locations shown in the figure, please compute their Euclidean(),city-block ()andchessboard distances()respectively。

西安交大数字图像处理双语试题

西安交大数字图像处理双语试题
) An image is s degraded b by a Gaussia an blur who ose Fourier transform t H H(u,v) is a G Gaussian H (u, v ) e ( u v )/2 , 13. A
Sket tch the gray y level transformation fo for a gamma a transforma ation that wi ill produce t the image on n the right. mera capture es a 400x400 pixel imag ge of a black and white e soccer ball l on a gray b background. The 2. A digital cam ball is 30 cm in n diameter an nd is 3 m aw way from th he camera. T The camera has a field o of field of 90 9 degrees izontally and d vertically. . hori (a) W What is the diameter of f the ball in pixels, in th he image? (i) 3 pixels (ii) 10 pixels (ii i) 20 pixels (iii) 31 pixe els (iv) 63 p pixels (b) G Give the his stogram of t the image, a assuming tha at black, wh hite, and gra ay pixels hav ve the gray levels 0, 25 55, and 128, respec ctively. Assu ume that the ere are an eq qual number r of black an nd white pix xels on the b ball. g (table tenn nis) ball is 4 40 mm in diameter. How w far away must the pin ng-pong bal ll be, to be (c) A ping-pong exac ctly the sam me apparent size as the s soccer ball i in the image e? (i) 1 10 cm (ii) 0.4 m (iii) 0.7 75 m (iv) 1 m (v) 3 m era has an im mage resolu ution of 2000 x 2000 pix xels. The in ndividual sen nsor elemen nts are squar res 3. A CCD came mea asuring 10 x 10 um, wit th no spaces s between th hem. a. If f the camera a uses a lens s with focal length = 10 00 mm, wha at is the field d of view? b. A Assume the c camera is m mounted on a an airplane, pointing str raight down n at the grou und. What he eight should d the airplane fly, so that one pix xel in the ca amera corres sponds to on ne meter on n the ground d? 4. T The histogram m of a 100x x100 image with 3 bit p pixels is give en below.

数字图像处理试卷及答案

数字图像处理试卷及答案

数字图像处理试卷及答案1.图像与灰度直⽅图间的对应关系是多对⼀;2.下列算法中a.梯度锐化b.⼆值化c.傅⽴叶变换d.中值滤波,属于点处理的是b⼆值化;3.在彩⾊图像处理中,常使⽤HSI模型,它适于做图像处理的原因有:1、在HIS模型中亮度分量与⾊度分量是分开的;2、⾊调与饱和度的概念与⼈的感知联系紧密。

;4.若将⼀幅灰度图像中的对应直⽅图中偶数项的像素灰度均⽤相应的对应直⽅图中奇数项的像素灰度代替(设灰度级为256),所得到的图像将亮度增加,对⽐度减少;5.MATLAB函数fspecial(type,parameters)常⽤类型有:average、gaussian、laplacian、prewitt、sobel、unsharp;6.检测边缘的Sobel算⼦对应的模板形式为:-1-2-1000121-101-202-1017.写出4-链码10103322的形状数:03033133;8.源数据编码与解码的模型中量化器(Quantizer)的作⽤是减少⼼⾥视觉冗余;9.MPEG4标准主要编码技术有DCT变换、⼩波变换等;10.图像复原和图像增强的主要区别是图像增强主要是⼀个主观过程,⽽图像复原主要是⼀个客观过程;第10题:图像增强不考虑图像是如何退化的,⽽图像复原需知道图像退化的机制和过程等先验知识1、数字图像数字图像是指由被称作像素的⼩块区域组成的⼆维矩阵。

将物理图像⾏列划分后,每个⼩块区域称为像素(pixel)。

数字图像处理指⽤数字计算机及其它有关数字技术,对图像施加某种运算和处理,从⽽达到某种预想⽬的的技术.2、8-连通的定义-对于具有值V的像素p和q,如果q在集合N8(p)中,则称这两个像素是8-连通的。

3、灰度直⽅图灰度直⽅图是指反映⼀幅图像各灰度级像元出现的频率。

4、中值滤波中值滤波是指将当前像元的窗⼝(或领域)中所有像元灰度由⼩到⼤进⾏排序,中间值作为当前像元的输出值。

像素的邻域邻域是指⼀个像元(x,y)的邻近(周围)形成的像元集合。

数字图像处理-期中测试题-zsj

数字图像处理-期中测试题-zsj

《数字图像处理》期中测试题(1-6章)一、填空题(每小题1分,共15分)1. 数字图像是用一个数字阵列来表示的图像。

数字阵列中的每个数字,表示数字图像的一个最小单位,称为__________。

2. 数字图像处理可以分为三个层面:一是从图像到图像,称为___________;二是从图像到符号,称为________________;三是从图像到语义,称为________________。

3. 图像因其表现方式的不同,可以分为________________和离散图像两大类。

4. 图像的量化可以分为均匀量化和________________两大类。

5. 对应于不同的场景内容,一般数字图像可以分为二值图像、______________和彩色图像三类。

6. 图像的几何坐标变换包括图像的平移、____________及旋转。

7. 人在区分颜色时常用三种基本特征量,它们是:亮度、____________和____________。

8. 国际照明委员会于1931年规定了三种基本色的波长,并将其称为三基色,它们分别是红色、蓝色和________________。

红色和蓝色的二次色称为___________。

9. 所谓图像变换,是指将图像信号从______________变换到另外的域上(如频域)进行分析的手段。

10. 理想低通滤波器对图像的处理会有__________效应,这种效应通过_____________滤波器可以减轻或消除。

二.选择题(每小题2分,共20分)1. 图象与灰度直方图间的对应关系是:()A、一一对应B、多对一C、一对多D、都不对2. 一幅256*256的图像,若灰度级数为16,则该图像的大小是:()A、128KBB、32KBC、1MBD、2MB3. 中值滤波器可以:()A、消除孤立噪声B、检测出边缘C、进行模糊图像恢复D、模糊图像细节4. 下图1是一幅标准测试图像Lena图,对图像进行处理后,形成的结果图像如图2所示。

数字图像处理题库(含答案)

数字图像处理题库(含答案)

[题目]数字图像[参考答案]为了便于用计算机对图像进行处理,通过将二维连续(模拟)图像在空间上离散化,也即采样,并同时将二维连续图像的幅值等间隔地划分成多个等级(层次),也即均匀量化,以此来用二维数字阵列表示其中各个像素的空间位置和每个像素的灰度级数(灰度值)的图像形式称为数字图像。

图像处理[参考答案]是指对图像信息进行加工以满足人的视觉或应用需求的行为。

题目]数字图像处理[参考答案]是指利用计算机技术或其他数字技术,对一图像信息进行某此数学运算及各种加工处理,以改善图像的视觉效果和提高图像实用性的技术。

一、绪论(名词解释,易,3分)[题目]图像[参考答案]是指用各种观测系统以不同形式和手段观测客观世界而获得的、可以直接或间接作用于人的视觉系统而产生的视知觉的实体。

一、绪论(简答题,难,6分)[题目]什么是图像?如何区分数字图像和模拟图像?[参考答案]“图”是物体透射或反射光的分布,是客观存在的。

“像”是人的视觉系统对图在大脑中形成的印象或认识,是人的感觉。

图像是图和像的有机结合,既反映物体的客观存在,又体现人的心理因素;图像是对客观存在的物体的一种相似性的生动模仿或描述,或者说图像是客观对象的一种可视表示,它包含了被描述对象的有关信息。

模拟图像是空间坐标和亮度(或色彩)都连续变化的图像;数字图像是空间坐标和亮度(或色彩)均不连续的、用离散数字(一般是整数)表示的图像。

[题目]简述研究图像恢复的基本思路。

[参考答案]基本思路是,从图像退化的数学或概率模型出发,研究改进图像的外观,从而使恢复以后的图像尽可能地反映原始图像的本来面日,从而获得与景物真实面貌相像的图像。

一、绪论(简答题,易,5分)[题目]简述研究图像变换的基本思路。

[参考答案]基本思路是通过数学方法和图像变换算法对图像的某种变换,以便简化图像进一步处理的过程,或在进一步的图像处理中获得更好的处理效果。

一、绪论(简答题,易,5分)[题目]简述一个你所熟悉的图像处理的应用实例。

数字图像处理考试试题

数字图像处理考试试题

数字图像处理考试试题一、选择题(每题 3 分,共 30 分)1、以下哪个是数字图像处理的主要研究内容?()A 图像增强B 图像压缩C 图像分割D 以上都是2、图像数字化的过程不包括()A 采样B 量化C 编码D 滤波3、灰度直方图反映了图像中()A 灰度级的分布情况B 像素的分布情况C 图像的清晰度D 图像的对比度4、中值滤波的主要作用是()A 去除噪声B 增强边缘C 平滑图像D 锐化图像5、图像旋转后出现的空白区域通常采用()方法进行填充。

A 最近邻插值B 双线性插值C 均值插值D 零值填充6、以下哪种图像压缩算法是无损压缩?()A JPEGB MPEGC Huffman 编码D 小波变换7、在图像分割中,阈值分割法是基于图像的()特征。

A 灰度B 纹理C 形状D 颜色8、边缘检测算子中,对噪声比较敏感的是()A Roberts 算子B Sobel 算子C Prewitt 算子D Canny 算子9、图像的几何变换不包括()A 平移B 旋转C 缩放D 傅里叶变换10、以下哪个指标用于评价图像增强的效果?()A PSNRB MSEC SNRD 以上都是二、填空题(每题 3 分,共 30 分)1、数字图像可以用矩阵来表示,矩阵中的元素值对应图像的______。

2、图像的分辨率越高,包含的______越多。

3、图像锐化是为了增强图像的______。

4、常见的彩色模型有 RGB、HSV 和______。

5、图像平滑处理中,均值滤波的窗口越大,平滑效果越______,但同时也会导致图像细节丢失越多。

6、图像的傅里叶变换将图像从______域转换到______域。

7、基于区域的图像分割方法通常依据图像的______特性来划分区域。

8、图像压缩的目的是减少图像的______,以便于存储和传输。

9、形态学图像处理中的膨胀操作可以使图像中的目标______。

10、图像的对比度是指图像中______的差异程度。

三、简答题(每题 10 分,共 20 分)1、简述图像增强的目的和常用方法。

数字图像处理考试试题

数字图像处理考试试题数字图像处理考试试题一、简答题1. 什么是数字图像处理?数字图像处理是指使用计算机对图像进行各种操作和处理的过程。

它包括图像获取、图像增强、图像压缩、图像分割、图像识别等多个方面。

2. 图像获取的方式有哪些?图像获取的方式主要有摄影、扫描、雷达、卫星遥感等。

其中,摄影是最常见的图像获取方式。

3. 什么是图像增强?图像增强是指通过一系列的算法和技术,改善图像的质量、清晰度和对比度等特征,使图像更易于观察和分析。

4. 图像压缩的目的是什么?图像压缩的目的是减少图像数据的存储空间和传输带宽,以便更高效地存储和传输图像。

5. 图像分割是什么?图像分割是将图像划分为若干个子区域的过程,每个子区域具有相似的特征。

图像分割在图像分析和图像理解中起着重要的作用。

二、计算题1. 对一幅大小为512×512的灰度图像进行直方图均衡化。

直方图均衡化是一种常用的图像增强方法,通过对图像的像素值进行变换,使得图像的直方图分布更均匀,从而增强图像的对比度。

2. 使用Sobel算子对一幅图像进行边缘检测。

Sobel算子是一种常用的边缘检测算法,它通过计算图像中每个像素点的梯度值,来确定图像中的边缘。

3. 使用K均值聚类算法对一幅彩色图像进行分割。

K均值聚类算法是一种常用的图像分割算法,它将图像中的像素点分成K个簇,使得同一个簇内的像素点具有相似的特征。

三、论述题1. 数字图像处理在现实生活中的应用。

数字图像处理在现实生活中有着广泛的应用。

例如,在医学领域,数字图像处理可以用于医学图像的增强和分析,帮助医生做出准确的诊断;在安防领域,数字图像处理可以用于视频监控和图像识别,提高安全性;在娱乐领域,数字图像处理可以用于电影特效和游戏图像的处理,提供更好的视觉体验。

2. 数字图像处理的挑战和发展趋势。

数字图像处理面临着一些挑战,如图像质量的提高、图像处理算法的优化等。

同时,随着人工智能和深度学习的发展,数字图像处理也呈现出一些新的趋势,如基于深度学习的图像识别和分割算法的应用,以及图像处理技术在虚拟现实和增强现实领域的应用等。

《数字图像处理》习题参考附标准答案

《数字图像处理》习题参考附标准答案《数字图像处理》习题参考答案第1章概述1.1连续图像和数字图像如何相互转换?答:数字图像将图像看成是许多大小相同、形状一致的像素组成。

这样,数字图像可以用二维矩阵表示。

将自然界的图像通过光学系统成像并由电子器件或系统转化为模拟图像(连续图像)信号,再由模拟/数字转化器(ADC)得到原始的数字图像信号。

图像的数字化包括离散和量化两个主要步骤。

在空间将连续坐标过程称为离散化,而进一步将图像的幅度值(可能是灰度或色彩)整数化的过程称为量化。

1.2采用数字图像处理有何优点?答:数字图像处理与光学等模拟方式相比具有以下鲜明的特点:1.具有数字信号处理技术共有的特点。

(1)处理精度高。

(2)重现性能好。

(3)灵活性高。

2.数字图像处理后的图像是供人观察和评价的,也可能作为机器视觉的预处理结果。

3.数字图像处理技术适用面宽。

4.数字图像处理技术综合性强。

1.3数字图像处理主要包括哪些研究内容?答:图像处理的任务是将客观世界的景象进行获取并转化为数字图像、进行增强、变换、编码、恢复、重建、编码和压缩、分割等处理,它将一幅图像转化为另一幅具有新的意义的图像。

1.4讨论数字图像处理系统的组成。

列举你熟悉的图像处理系统并分析它们的组成和功能。

答:如图1.8,数字图像处理系统是应用计算机或专用数字设备对图像信息进行处理的信息系统。

图像处理系统包括图像处理硬件和图像处理软件。

图像处理硬件主要由图像输入设备、图像运算处理设备(微计算机)、图像存储器、图像输出设备等组成。

软件系统包括操作系统、控制软件及应用软件等。

图1.8 数字图像处理系统结构图11.5常见的数字图像处理开发工具有哪些?各有什么特点?答.目前图像处理系统开发的主流工具为Visual C++(面向对象可视化集成工具)和MATLAB 的图像处理工具箱(ImageProcessingToolbox)。

两种开发工具各有所长且有相互间的软件接口。

《数字图像处理》习题参考答案

1《数字图像处理》 习题参考答案第1章概述1.1连续图像和数字图像如何相互转换?答:数字图像将图像看成是许多大小相同、形状一致的像素组成。

这样,数字图像可以用二维矩阵表示。

将自然界的图像通过光学系统成像并由电子器件或系统转化为模拟图像 (连续图像)信号,再由模拟 /数字转化器(ADC )得到原始的数字图像信号。

图像的数字化包括离散和量化两个主要步骤。

在空间将连续坐标过程称为离散化,而进一步将图像的幅度值(可能是灰度或色彩)整数化的过程称为量化。

1.2采用数字图像处理有何优点?答:数字图像处理与光学等模拟方式相比具有以下鲜明的特点:1 •具有数字信号处理技术共有的特点。

(1)处理精度高。

(2)重现性能好。

(3)灵活性高。

2•数字图像处理后的图像是供人观察和评价的,也可能作为机器视觉的预处理结果。

3•数字图像处理技术适用面宽。

4 •数字图像处理技术综合性强。

1.3数字图像处理主要包括哪些研究内容?答:图像处理的任务是将客观世界的景象进行获取并转化为数字图像、进行增强、变换、编码、恢复、重建、编码和压缩、分割等处理,它将一幅图像转化为另一幅具有新的意义的 图像。

1.4讨论数字图像处理系统的组成。

列举你熟悉的图像处理系统并分析它们的组成和功能。

答:如图1.8,数字图像处理系统是应用计算机或专用数字设备对图像信息进行处理的 信息系统。

图像处理系统包括图像处理硬件和图像处理软件。

图像处理硬件主要由图像输入设备、图像运算处理设备(微计算机) 、图像存储器、图像输出设备等组成。

软件系统包括操作系统、控制软件及应用软件等。

1.5 常见的数字图像处理开发工具有哪些?各有什么特点?答.目前图像处理系统开发的主流工具为 Visual C++ (面向对象可视化集成工具)和 MATLAB 的图像t+W<住《l 塁希碎«IUIMEH 鼻爭■图1.8数字图像处理系统结构图处理工具箱(Image Processing Tool box )。

数字图像处理期中考试最终版本

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