Problem in Fractal Box Count plugin

[Sudheshna M]

> Hi,
>
> I found this peculiar thing in imagej Fractal Box Count plugin: For the
> same binary image, it gives two different values of fractal dimension.
>
> 1. I open the original image, convert it to binary, find the fractal
> dimension. Suppose it is 1.1531.
> 2. Now I invert the image and then find the dimension again. Say it now
> gives 1.95.
> 3. If I now save the inverted binary image, close it and then reopen the
> file (which is result of step 2), the fractal dimension it gives is 1.1531,
> whereas it should have been 1.95.
>
> Kindly help me clarify this.
>
> Thank you very much.
>
> Sudheshna.
>
>
>

... [show rest of quote]

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[Gabriel Landini]

On Thursday 31 Jan 2013 11:00:38 Sudheshna Moka Muttana wrote:

> I found this peculiar thing in imagej Fractal Box Count plugin: For the
> same binary image, it gives two different values of fractal dimension.
>
> 1. I open the original image, convert it to binary, find the fractal
> dimension. Suppose it is 1.1531.
> 2. Now I invert the image and then find the dimension again. Say it now
> gives 1.95.
> 3. If I now save the inverted binary image, close it and then reopen the
> file (which is result of step 2), the fractal dimension it gives is
> 1.1531, whereas it should have been 1.95.

You are probably confusing what is foreground and what is background or are
using an inverted look up table or when you open IJ again the foreground and
background are inverted.
There is a binary option to work consistently with a black baground but you
need to store this in the Startup Macros file to make it a default.

Cheers

Gabriel

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