Define the appropriate threshold level

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ali 2016-6-23

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https://ww2.mathworks.cn/matlabcentral/answers/291967-define-the-appropriate-threshold-level

回答： ali 2016-7-5

Hi all, There are some images that I obtained from different levels. Like in file. Four of them have different level particles inside it. How can I define the appropriate value. Is it necessary to remove information zone from image or not? For each image ı want to define suitable value. Also there should be similar images like this Thanks.

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Answer 1

ali 2016-6-24

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编辑：ali 2016-6-24

Any suggestion. For example triangle threshold or look for histogram values. Or looking for two level segmentation which one is better?

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Answer 2

ali 2016-6-24

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If I try random values for all images for example 0.5 for 1 and 4 image. And 0.7 for 2 and 3 image I got good results. But for all of them if i use graythresh then theresult not good for me. So any suggestions.