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how to set all pixels in the range (100 , 190) to 40 for some picture called "school" ??

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Maria
Maria 2013-6-21
回答： Image Analyst 2014-6-24
how to set all pixels in the range (100 , 190) to 40 for some picture called "school" ?? , plz i need full code for doing that

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回答（3 个）

Iain
Iain 2013-6-21
If you mean pixel levels in that range:
school(school > 100 & school < 190) = 40;
Walter Roberson
Walter Roberson 2013-6-21
编辑：Walter Roberson 2013-6-21
school = imread('school.tif');
school(school > 100 & school < 190) = 40;
imshow(school)
Image Analyst
Image Analyst 2014-6-24
Try
school(school >= 100 & school <= 190) = 40;
Same as the others had but since 100 and 190 are in the range I used the = sign whereas the others didn't so pixels with values of 100 and 190 will not get set to 40 in their answers.

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