Which of the following is not a description of image texture? （ ） A: the frequency of tonal change on an image B: the apparent roughness of an image region C: the apparent smoothness of an image region D: relative brightness of objects in the image

What characteristics of short poems (绝句) in Tang poetry? A: They have four lines. B: They have a strict tonal pattern and rhyme scheme. C: They have eight lines. D: Each line contains five or seven characters.

What are the characteristics of short poems (绝句) in Tang poetry? A: They have four lines. B: Each line contains five or seven characters. C: They have a strict tonal pattern and rhyme scheme. D: They have eight lines.

Which of the following statements about image texture is correct: refers to which characteristics of the image? ( ) A: Image texture is the relative brightness of objects in the image B: Image texture is the apparent roughness of an image region C: Image texture is the apparent smoothness of an image region D: Image texture is the frequency of tonal change on an image