On Jun 27, 12:21=A0pm, ImageAnalyst <imageanal...@[EMAIL PROTECTED]
> wrote:
> On Jun 27, 6:56=A0am, Ponch <timpo...@[EMAIL PROTECTED]
> wrote:
>
>
>
> > Hi,
>
> > I am trying to load an image, create a region of interest which is not
> > rectangular, create a mask of this area for me to then do some basic
> > processing on it.
> > In the selected region i want to subtract the blue band from the red,
> > and then plot a contour of a various level from that image.
>
> > However i am stuck trying to apply the mask. I have the following so
> > far;
>
> > I=3Dimread ('plan.jpg');
> > mask=3Droi2poly;
>
> > rbI=3Ddouble(I(:,:,1))-double(I(:,:,3));
> > contour(rbI,[0 0]);
>
> > What i am not sure on is how to apply the mask to the image as a
> > whole, if i need to use the find command, if so how?
>
> > Any suggestions would be very helpful.
>
> > Cheers
> > Ponch
>
> ------------------------------------------
> (This is MATLAB). =A0You need to dot-multiply your mask by your image:
> maskedImage =3D rbI .* mask;
>
> Regards,
> ImageAnalyst
Hi,
Thanks,
If i do this the new image is a binary representation of the red-blue
band. I really want to be able to plot the image as a pcolor to see
the different conoturs before choosing which to select for a contour
plot.
So i guess i want to use the mask in the same way as a croping the
image would allow, however it seems you can only crop in rectangles
with Matlab?
Thanks
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