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Change Pixel intensity value

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Pugazhendhi
Pugazhendhi 2012-2-21
评论： Image Analyst 2018-2-17
Hi all,
I have an image(gray scale) whose pixel intensity values ranges from -0.5373 to 0.4744. I would like to change the intensity value which is lesser than 0 to 0. Can any one help me to solve this.
Thanks.

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采纳的回答

Honglei Chen
Honglei Chen 2012-2-21
Say your image is x,
x(x<0) = 0;
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Honglei Chen
Honglei Chen 2012-2-21
I'm just making an example, make sure there are negative numbers in x.
Image Analyst
Image Analyst 2012-2-22
No, you don't need all that reshaping stuff. "x(x<0)=0" is sufficient to work on the whole 3D matrix (e.g., a color image) - no reshaping is needed.

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更多回答（2 个）

Walter Roberson
Walter Roberson 2012-2-21
X = max(0, X); %another way of changing anything less than 0 to 0
vishnu lohith
vishnu lohith 2018-2-16
use a suitable transformation to change the intensities from ( 0,255) to (65,180).
  1 个评论
Image Analyst
Image Analyst 2018-2-17
Are you sure you posted to the correct six year old question? Not sure what your answer has to do with the original question about clamping the signal to zero.

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