Re: multiple tresholds

Posted by Herbie on
URL: http://imagej.273.s1.nabble.com/multiple-tresholds-tp5019224p5019230.html

Martin,

in case of three levels the solution is easy:

Make a suitable three-color RGB-LUT and after application to your image
change the image type to RGB and split the channels. Now you have three
binary images that let you determine the percentages.

In case you need more than three levels a solution is less
straightforward...

Best

Herbie

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Am 18.08.17 um 10:57 schrieb Braekevelt Martin:

> Good day to you to Herbie,
>
> I also already did some trials with LUT feature, but beside a false color overlay on my image I also need the percentage of the 3 predefined colors, representing a certain volume of phase present.
> I don't know if this data can be generated by LUT.
>
> Thanks for the help.
>
> Kindest regards,
> Martin.
>
> -----Original Message-----
> From: ImageJ Interest Group [mailto:[hidden email]] On Behalf Of Herbie
> Sent: Friday, August 18, 2017 10:18 AM
> To: [hidden email]
> Subject: Re: multiple tresholds
>
> Good day Martin,
>
> as far as I understand, you should have a close look at the LUT-feature of ImageJ:
> <https://imagej.nih.gov/ij/docs/guide/146-28.html#sub:Lookup-Tables>
>
> A suitably chosen LUT won't need any thresholds. You can construct your own LUTs.
> <https://imagej.nih.gov/ij/docs/guide/146-28.html#sub:Edit-LUT>
>
> HTH
>
> Herbie
>
> :::::::::::::::::::::::::::::::::::::::::::::::
> Am 18.08.17 um 08:43 schrieb Braekevelt Martin:
>> Dear all,
>>
>> I have posted a question a couple of weeks ago concerning
>> thresholding/phase analysis. What I want is to determine a set of
>> tresholds in a histogram distribution of grey value pixels. In ImageJ
>> I only find current/over and under option for the histogram
>> distribution, and the false colors related to that are not visible
>> together in the image. The goal is to have multiple threshold
>> selections in different colors and superimpose them on the image as a
>> false color overlay. Thanks in advance for the help.
>>
>> Kindest regards, Martin.
>>
>> Braekevelt Martin Global Metallographic Lab Process Owner(GLaM) Oude
>> Heerweg 5 8540 DEERLIJK BELGIUM Tel. [phone] Mobile
>> :[phone]
>>
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