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1) Set scale. Enlarge your image, draw a line of the exactly same length to the scale bar. For you image, 81.5 pixel = 20 um)

2) Adjust threshold, which showed reasonable segmentations.

3) Analysis Particles. Based on the visional pore sizes, I would say areas between 100 um^2 and 600 um^2 should be the correct pores.

4) Copy the results into the Excel to calculate the average and the stDev.

The 45 pores were detected out. The pore perimeter is 25.6 +/- 9.8 um. Some pore might be missed due to either the irregular shapes or the low image contrasts (not good segmentations)

Cheers!
2Â¥2015-11-24 09:36:04
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2Â¥: Originally posted by dota at 2015-11-24 09:36:04
1) Set scale. Enlarge your image, draw a line of the exactly same length to the scale bar. For you image, 81.5 pixel = 20 um)

2) Adjust threshold, which showed reasonable segmentations.

3) Anal ...

several screenshots...
Image J  Í³¼Æ¿×³ß´ç-1
1) set scale.png


Image J  Í³¼Æ¿×³ß´ç-2
2) adjust threshold.png


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3) analysis particles.png


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4) result.png

3Â¥2015-11-24 09:38:56
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3Â¥: Originally posted by dota at 2015-11-24 09:38:56
several screenshots...

1) set scale.png

2) adjust threshold.png

3) analysis particles.png

4) result.png
...

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4Â¥2015-11-24 10:12:29
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dota

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4Â¥: Originally posted by PEEK_polymer at 2015-11-24 10:12:29
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Slightly adjust, analysis, and check up the result. If not so happy, just re-do. It is based on your personal experience. So, there is bias.
5Â¥2015-11-24 11:04:46
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6Â¥2015-11-24 11:28:55
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6Â¥: Originally posted by lishaojie2 at 2015-11-24 11:28:55
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8Â¥: Originally posted by liangyangjie at 2015-11-24 13:34:40
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6Â¥: Originally posted by lishaojie2 at 2015-11-24 11:28:55
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