Digital Image Processing interview Questions3

 5.IMAGE DEGRADATION/RESTORATION

1)Image transformation is the main source of noise occurring in a__________

ans)digital image

2)________________is a technique employed for improving the image quality and performance in both spatial and frequency domain.

ans)image restoration

3)The filter____is used to determine the average value of the corrupted image g(x,y).

ans)arthemetic mean

4)The process of recovering an input of a system from its output is known as__________filtering.

ans)inverse

5)The ____________________filter is an optimum filter used to minimize the mean square error.

ans)wiener

6)The three principal modeling used for measuring image restoration are observation,experimentation and___________________

ans)mathematical

7)The process of obtaining restoration by biasing the solution is known as ___________restoration.

ans)constrined

8)A_________ filter is employed to minimize salt and pepper noise.

ans)median

9)The main source of noise caused in a digital image is due to image________

ans)transmission

10)The performance metric related to image restoration are blined signal to noise ratio and______________

ans)improvement in signal to noise ratio

11)The expression for general model of image degradation is g(m,n)_________________

ans)f(m,n)*h(m,n)+ᶯ(m,n)

12)The most frequently used filters in image processing are known as_____________filters.

ans)max and min filters

13)what is  an image degradation?

ans)  The process in which the original image is blurred resulting in a degraded image.

14)what is an image restoration?

ans)The process of recovering an original image from its degraded observations.

15)Arthemetic mean filter is used for________

ans)To determine the average value of the corrupted image.

16)Median filter is one of the ______________filter.

ans)orderstatic

17)The max filter is also called as_________________

ans)100% filter

18)The min filter is also called as___________________________

ans)0% filter

19)Mid point filter means______________

ans)Mid point between a max and min valuesin a prescribed area.

20)Max and min filters are________________filter types.

ans)order static

                                               

                                             6.IMAGE SEGMENTATION

1)The process of subdividing an image into constituent regions is known as_____

ans)image segmentation

2)_____________________detection is 1 st step in image segmentation.

ans)edge

3)________________technique is used to convert gray scale image into binary image based on image intensity value.

ans)global thresholding

4)_________________are designed to detect edge poxels.

ans)edge detector

5)In__________method neighbouring pixels are tested and added to region where no edges are detected.

ans)region growing

6)______________________is a top down approach

ans)region splitting

7)____________filter is used to reduce the noise

ans)smoothing

8)Image segmentation is employed to etect cancerous cells and________________from satellite image.

ans)road

9)_________________Image is produced by comparing reference image with each subsequent image i9n the sequence.

ans)accumulative difference image

10)The structure used to represent splitting technique is known as ___________

ans)quadtree

11)The basic concept of image segmentation are edge detection,thresholding and__________________( c )

  a)back_ground                           b)watersheds

   c)region growing                       d)none of the above

12)Image segmentation is brodly classified into   (  a)

       a)local&global                         b)local&internationall

       c)regional                                 d)none of the above

13)_______________is used to identify areas in which large change in intensity occurs(  a)

       a)edge detection                            b)causes of edge

       c)segmentation                               d)none of the above

14)The three types of accumulative difference image are absolute ,positive and(   b)

        a)objects                                b)negative

        c)reference                             d)intensity

15)The frequency velocity relationship is given as_____________________

ans)U1=A1V1 AND U2=A2V2

16)The image is subdivided into its fundamentals regions or objects is called as_____________

Ans)image segmentation

17)face and fingerprint recognition are the applications of_________________

Ans)image segmentation

18)The graphical representation of intensity levels are called as__________

Ans)Histogram

19)Thresholding types are___________

ans)global and adaptive

20)The noise can be reduced by using________________________--filters.

ans)smoothing filters