Why NaN area is involved in segmented image?

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Tian Tian 2017-11-18

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https://ww2.mathworks.cn/matlabcentral/answers/367868-why-nan-area-is-involved-in-segmented-image

编辑： Tian Tian 2017-11-19

I am using water-shed segmentation to segment objects (porous). But areas with NaN value set by codes, is still shown in segmented image (highlighted in color with other objects). Can anyone give me a clue? Thank you.

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Image Analyst 2017-11-19

No. No image and no code mean no answer.

Tian Tian 2017-11-19

编辑：Tian Tian 2017-11-19

Thanks for reminding. Below is the code to convert to NaN value. for coloum = 1:width for row =1:height if (I(row,coloum)==0 | I(row,coloum)< 25) I(row,coloum)= nan; end end end In segmentation, I didn't mention any NaN value (only imopen, imclose, then segment).

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