题目内容

A digital image has 100×100 pixels, and its gray scale is [0 255]. The data quantity after Huffman encoding is 20000 bits, then the compression ratio is ( ) .

A. 2:1
B. 4:1
C. 8:1
D. 16:1

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The mask [-2,-1,0; -1,0,1; 0,1,2] can be used to detect the ( ) edge.

A. horizontal
B. vertical
C. 45º
D. 135º

( ) can blur the image or remove the noise in the image.

A. Smoothing filters
B. Sharpening filters
C. Ideal highpass filters
D. Homomorphic filters

Output image g(u,v) is obtained from the input image f(x,y) by using the equation: u=cx, v=dy. Then the transformation is ( ).

A. image mirror
B. image magnification
C. image rotation
D. image translation

Which one can reflect the contrast of a digital image?

A. mean
B. variance
C. median
D. mode