在MATLAB中，可以将彩色图像在各个色彩空间中相互转换，下列四个选项中是rgb空间转换为YCrCb空间的语句是（ ） A: f4=imread('Fig0404.jpg'); B: B = imfilter(A,H); C: rgb_image = cat (3, fr, fg, fb); D: ycbcr_image = rgb2ycbcr(rgb_image);

The term full-color image is used often to denote a 24-bit RGB color image.

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

请把birdnest.jpg彩色图片，转换为黑白图片，并保存为pic1.png，请正确的程序段： A: from PIL import Image im = Image.open('birdnest.jpg') om = im.convert("RGB") om.save('"pic1.png"') B: from PIL import Image im = Image.open('birdnest.jpg') om = im.convert("L") om.save('"pic1.png"') C: from PIL import Image im = Image.open('birdnest.jpg') om =im.convert("CMYK") om.save('"pic1.png"') D: from PIL import Image im = Image.open('birdnest.jpg') om = Image.convert("L") om.save('"pic1.png"')

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

GHOST软件可以将整个硬盘所有内容进行备份,方法是________。 A: Partition To Image B: Disk To Image C: Partition From Image D: Disk From Image

The better the pre-processing the better the image ___and the results of the image processing within your ____.

使用Ghost软件恢复分区，应先选择菜单（ ） A: Local→Partition→From Image B: Local→Disk→From Image C: Local→Partition→To Image D: Local→Disk→To Image

image

RGB颜色模式中表示白色的是（） A: RGB（255,255,255） B: RGB（255,0,255） C: RGB（0,0,0） D: RGB（0,0,255）