Prev: Anyone have a VPN working with 2009b?
Next: spectral estimation
From: Anjan on 6 Apr 2010 00:49
Hi,

I am trying to use code very similar to example 2 here http://www.mathworks.com/access/helpdesk/help/toolbox/images/imtransform.html to superpose a sub-image onto a base image. If a pixel is my fillvalue, I leave it transparent for the base image to show through. However, I get this narrow band at the edge of the sub-image which is neither my fillvalue nor part of the sub-image. Does anyone else see this problem? Thanks for any help.

Anjan Ghose
From: Ashish Uthama on 6 Apr 2010 08:26
On Tue, 06 Apr 2010 01:49:04 -0300, Anjan <invisibleidi0t(a)yahoo.com> wrote:

> Hi,
>
> I am trying to use code very similar to example 2 here
> http://www.mathworks.com/access/helpdesk/help/toolbox/images/imtransform.html
> to superpose a sub-image onto a base image. If a pixel is my fillvalue,
> I leave it transparent for the base image to show through. However, I
> get this narrow band at the edge of the sub-image which is neither my
> fillvalue nor part of the sub-image. Does anyone else see this problem?
> Thanks for any help.
>
> Anjan Ghose



Is this effect visible in the example you mention?

I see interpolation artifacts on the image boundary. You could try using
'nearest' neighbor interpolation to confirm if this band you see is
related to interpolation.

From: Anjan on 8 Apr 2010 00:40
Yes, it was interpolation related. Thanks for the help.

"Ashish Uthama" <first.last(a)mathworks.com> wrote in message <op.vaqsyioza5ziv5(a)uthamaa.dhcp.mathworks.com>...
> On Tue, 06 Apr 2010 01:49:04 -0300, Anjan <invisibleidi0t(a)yahoo.com> wrote:
>
> > Hi,
> >
> > I am trying to use code very similar to example 2 here
> > http://www.mathworks.com/access/helpdesk/help/toolbox/images/imtransform.html
> > to superpose a sub-image onto a base image. If a pixel is my fillvalue,
> > I leave it transparent for the base image to show through. However, I
> > get this narrow band at the edge of the sub-image which is neither my
> > fillvalue nor part of the sub-image. Does anyone else see this problem?
> > Thanks for any help.
> >
> > Anjan Ghose
>
>
>
> Is this effect visible in the example you mention?
>
> I see interpolation artifacts on the image boundary. You could try using
> 'nearest' neighbor interpolation to confirm if this band you see is
> related to interpolation.
 | 
Pages: 1
Prev: Anyone have a VPN working with 2009b?
Next: spectral estimation