Posted by
Mike Miller-10 on
Apr 02, 2007; 2:39am
URL: http://imagej.273.s1.nabble.com/image-gradient-measurement-with-ImageJ-tp3699884p3699885.html
Hello,
My first impression when I think gradient was that you wanted Process ->
Binary -> Distance Map. But since you mentioned the local variance, try
Process -> Filters -> Variance...
This second command will change the color each pixel to correspond with the
variance. You can specify a radius of consideration.
A third consideration might even be able to duplicate the image, perform a
Gaussian blur and then subtract the two images using Process -> Image
Calculator. This last technique has proven very noisy for me, but also
allows more detail through.
I hope one of the last two was helpful.
-Mike
On 3/31/07, Juan Francisco <
[hidden email]> wrote:
>
> Dear all:
> Please i got the following question:
> using ImageJ is possible to create the "gradient" image from a original
> image?, I mean: for a image given, it would be possible to compute a map
> showing the gradient on each pixel of the original image? Gradient is the
> local variation of the signal on the image.
> Thank you very much!!
> Juan Francisco
>
>
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--
-Mike