题目内容

Each pixel has two attributes at least: ______ and gray-level value.

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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

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