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How to extend this boundary line?

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Veronika
Veronika 2017-3-11
评论： Veronika 2017-3-12
Dear all,
I have this boundary line
and I would like to extend this blue line (boundary points). Is there any option for my problem?
I attach my code.And original image.
  2 个评论
Image Analyst
Image Analyst 2017-3-11
I don't know what "extend" means to you. Do you mean like you want to enlarge the region, like as if you used imdilate() or something?
Veronika
Veronika 2017-3-12
Yes, this is actually I want. I want enlarge the region, because as you can see this region (thorax) isn´t accurate, there is small space to enlarge this blue boundary line.

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回答（1 个）

Image Analyst
Image Analyst 2017-3-12
The threshold value of 180 probably needs to be adjusted for this image.
  1 个评论
Veronika
Veronika 2017-3-12
But I don´t know how....Do you think, that I can´t change only the boundary blue line or points somehow?

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