Digital Image Processing interview Questions4

 7.IMAGE COMPRESSION

1)The process of reducing the amount of data required to represent a given quantity of information is known as _______________________

Ans)Image compression

2)_____________is achieved when one or more redundencies are reduced or eliminated.

Ans)data compression

3)The information that has less relative important than other information in normal visual processing is known as_____________redundency.

Ans)psychovisually

4)The error free compression is used for data reduction and provide compression ratio of________________

Ans)2 to 10

5)__________coding generates non block codes.

Ans)arithemetic

6)______________Technique relay on protecting first and second moments of an image.

Ans)block truncatyion coding

7)_____________quantization occupies maximum compression which are theoretically possible.

Ans)voctor

8)_______coding maps number of sequences of symbol pair.

Ans)Run length

9)The ______________compression is used for both static and dynamic compression and encoding variable length patterns.

Ans)Dictionary based

10)____________compression technique is capable of reproducing the mono chrome images from the data which is beging compressed more than 100:1.

Ans)lossy

11)The three basic redundecies are coding,inter pixel and ________redundency ( b )

a)statistical                                    b)psychovisual

12)The two types of fidelity criterian used to reduce psychovisual redundant data are ( a )

a)subjective and objective fidelity criteria               b)image compression

c)mapping                                                     d)none of the above

13)The two types of image compression schemes are ( a )

a)lossless and lossy                                    b)reversible and irreversible

c)channel and source coding                        d)none of the above

14)The efficiency of Huffman coding is less than that of ____________coding.( c )

a)Shannon               b)runlength

c)arithemetic            d)none of the above

15)_________method is commonly for redcing code redundancy ( d )

a)arithemeic coding               b)variable length coding

c)Huffman coding                  d)both b and c

16)Image compression is also called as___________

Ans)data compression

17)Basically data redundencies are___________types.

Ans)3

18)The process of reducing the unwanted data is known as__________

Ans)image compression

19)symbol encoder is used to reduce_________________redundencies.

Ans)coding

20)dictionary based coding are ________techniques.

Ans)faster

                                           8.COLOR IMAGE PROCESSING

1)________enables a standared way to describe a particular color in 3d coordinate system.

Ans)color model

2)The color model spanned by a set of primary colors is known as_____________

Ans)color gaumt

3)The most commonly used hardware aligned modles are___________

Ans)RGB,CMY,CMYK AND HIS

4)In RGBmodel,the number of bits employed o reoresent each pixel iis known as____----

Ans)pixel depth

5)The method is used for assigning colors to monochrome image from true color image is known as__________color image processing.

Ans)pseudo

6)____deals with the transformation of color image components with in the same color model.

Ans)color transformation

7)_______________operation is primarly used to reduce the effects of spurious noise and to blur the false contore that are present in a digital image.

Ans)smoothing

8)The image_____________is used to enhance the natural effects of  particular image.

Ans)sharpening

9)The process of partitioning image into different regions based on color is known as_______________

Ans)color segmentation

10)The most important aspect of image segmentation is _____

Ans)edge detection

11)The three values of each pixel in a color image are   ( a )

a)RGB                             b)CYM

C)BCY                               d)RYG

12)____is a measure of degree to which a pure color is diluted by white light ( c )

a)smoothing                       b)sharpening

c)saturation                         d)hue

13)smoothing algorithm is devoleped for both spatial and_______domain ( b )

a)angular          b)frequency

c)phase        d)none of the above

14)HIS can be calculated from RGB as  ___________________

Ans)H=θ for B<=G

             360- θ for B>G

15)The four types of color transrormation are color complements,tone and color correction and ( b )

a)photoshop and mixing                                     b)formulation and color slicing

c)scanners and color display                              d)none of the above

16)primary colors are_______________

Ans)R,G,B

17)Secondary colors are_______________

Ans)C,M,Y

18)White color is the combination of_________________colors.

Ans)R,G,B

19)Black color is the combination of__________colors.

Ans)C,M,Y

20)The units of radiance is ______________

Ans)Watts