依照分割时所依据的图像特性不同，图像分割方法大致可以分为（）_爱下问搜题

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问题填空题

依照分割时所依据的图像特性不同，图像分割方法大致可以分为（）、边界分割方法和区域提取方法三大类。

答案

参考答案：阈值方法

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                                                             ANY VOLUNTEERS?
                                                       MORE WAYS TO GET INVOLVED
                                                            WHILE HAVING GREAT FUN

GLOBAL VOLUNTEERS
What it is: Volunteers can choose from 20 countries yearround. Projects include teaching English, caring
for children, building and repairing community buildings and assisting with health care.
Length of Stay/Cost:l-3 weeks/$ 695 and up, airfare not included.
Living, Conditions : Local homes , simple hotels. Comfortable.
Vibe: Famous organization with plenty of media coverage
from People magazine to Oprah.
Web site: globalvolunteers, org

ENKOSINI ECO EXPERIENCES
What it is: Projects in South Africa. Volunteers work in conservation, rehabilitation and research projects
with animals ranging from penguins to lions.
Length of Stay/Cost:2-4 weeks/ $ 795- $ 2195 w/o airfare.
Living Conditions: Not for the high-maintenance types.
Vibe:Does the idea of feeding baby monkeys from a bottle make you feel excited?
Web site: enkosiniecoexperience. Com

HABITAT NEW ORLEANS
What it is: Rebuilding/building affordable housing.
Training is done on site; no experience is required.
Length of Stay/Cost: One day or more/Free to participate.
Living Conditions: Up to you. Group living in "Camp Hope, "an elementary- school- turned- volunteer-
housing or stay at the Ritz-Carlton
Vibe:Easygoing. Potential for celeb spotting,for instance.
Web site: habitat-nola. org

EARTH WATCH INSTITUTE
What it is:A number of environmental volunteer projects, such as the one in The Bahamas where do-
gooders snorkel(潜水) remote islands to survey and document the health of the coral reefs.
Length of Stay/Cost:Eight-day Bahamas trip costs $ 2 446w/o airfare.
Living Conditions:Shared rooms at Cerace Research Center (a former U. S Navy base. )Simple meals
provided
Vibe: Volunteers are definitely there to work. But it's TheBahamas. So how bad can it be?
Web site: earthwatchexpeditions. org

1. All of the volunteers will ________in the four activities.

A. teach young kids
B. have a lot of fun
C. experience nature
D. beautify the environment

2.If you are short of money, which group would you like to join?

A. ENKOSINI ECO EXPERIENCES
B. EARTH WATCH INSTITUTE
C. HABITAT NEW ORLEANS
D. GLOBAL VOLUNTEERS

3. According to the advertisement, which of the following is true?

A. You have to cook yourself in EARTH WATCH INSTITUTE.
B. You need to have experience to join HABITAT NEW ORLEANS.
C. You may learn to feed a baby in ENKOSINI ECO EXPERIENCES.
D. You have a chance to serve in a community in GLOBAL VOLUNTEERS.

填空题

李明同学带着20kg的一筐苹果去看望爷爷奶奶，这框苹果的重力是______，重力的施力物体是______．