pixel intensity values

[Василий Попков]

Good time of a day. I have faced a problem which I cannot solve. I
need to get values of pixel intensity in log scale. I can see this via
"histogram - log" but I cant get values there. I can do the same if
I'll get values of pixel intensity in numbers and log it in excel, but
I cant see any function which will give me pure numbers for each
pixel... Can you help me, please?

Sorry if I am writing to a wrong list - I have just subscribed.


Thank you,

Vasily

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[Balazadeh Mohtadi, Carlos]

Hi Vasily,

Pixel inspector will give you values in a 7x7 matrix, I believe it is
limited to that due to performance reasons as I tried to get it bigger but
was addressed to me that I'd have to write a new plugin like it.

Hope that helps,

Best regards,

Keyvan B.

On Fri, Dec 5, 2014 at 9:02 AM, Василий Попков <[hidden email]> wrote:

> Good time of a day. I have faced a problem which I cannot solve. I
> need to get values of pixel intensity in log scale. I can see this via
> "histogram - log" but I cant get values there. I can do the same if
> I'll get values of pixel intensity in numbers and log it in excel, but
> I cant see any function which will give me pure numbers for each
> pixel... Can you help me, please?
>
> Sorry if I am writing to a wrong list - I have just subscribed.
>
>
> Thank you,
>
> Vasily
>
> --
> ImageJ mailing list: http://imagej.nih.gov/ij/list.html
>

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[Василий Попков]

Thank you for reply.
I checked it. Yes seems it would have worked if it was not few pixels, but
giant table.
Actually, I dont need the table - I need the same "measure" options, but
only on logarithm of intensities. But I don't know how to do it another way.

2014-12-05 16:36 GMT+03:00 Balazadeh Mohtadi, Carlos <
[hidden email]>:

> Hi Vasily,
>
> Pixel inspector will give you values in a 7x7 matrix, I believe it is
> limited to that due to performance reasons as I tried to get it bigger but
> was addressed to me that I'd have to write a new plugin like it.
>
> Hope that helps,
>
> Best regards,
>
> Keyvan B.
>
> On Fri, Dec 5, 2014 at 9:02 AM, Василий Попков <[hidden email]>
> wrote:
>
> > Good time of a day. I have faced a problem which I cannot solve. I
> > need to get values of pixel intensity in log scale. I can see this via
> > "histogram - log" but I cant get values there. I can do the same if
> > I'll get values of pixel intensity in numbers and log it in excel, but
> > I cant see any function which will give me pure numbers for each
> > pixel... Can you help me, please?
> >
> > Sorry if I am writing to a wrong list - I have just subscribed.
> >
> >
> > Thank you,
> >
> > Vasily
> >
> > --
> > ImageJ mailing list: http://imagej.nih.gov/ij/list.html
> >
>
> --
> ImageJ mailing list: http://imagej.nih.gov/ij/list.html
>

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[Gabriel Landini]

On Friday 05 Dec 2014 16:02:19 Василий Попков wrote:
> Good time of a day. I have faced a problem which I cannot solve. I
> need to get values of pixel intensity in log scale. I can see this via
> "histogram - log" but I cant get values there. I can do the same if
> I'll get values of pixel intensity in numbers and log it in excel, but
> I cant see any function which will give me pure numbers for each
> pixel... Can you help me, please?

What about: duplicate the image, convert to 32 bit and apply Process>Math>log.
You might have to adjust the contrast to see the image.

Unless I am mistaken, even it is called "log" it is the "ln" operation.

Regards

Gabriel

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[Василий Попков]

Thank you. It seems to me this can solve my problems.

2014-12-05 16:56 GMT+03:00 Gabriel Landini <[hidden email]>:

> On Friday 05 Dec 2014 16:02:19 Василий Попков wrote:
> > Good time of a day. I have faced a problem which I cannot solve. I
> > need to get values of pixel intensity in log scale. I can see this via
> > "histogram - log" but I cant get values there. I can do the same if
> > I'll get values of pixel intensity in numbers and log it in excel, but
> > I cant see any function which will give me pure numbers for each
> > pixel... Can you help me, please?
>
> What about: duplicate the image, convert to 32 bit and apply
> Process>Math>log.
> You might have to adjust the contrast to see the image.
>
> Unless I am mistaken, even it is called "log" it is the "ln" operation.
>
> Regards
>
> Gabriel
>
> --
> ImageJ mailing list: http://imagej.nih.gov/ij/list.html
>

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