Re: [SIP-devel] Problem with color images

[DRUEL J. <joc...@li...>]

Hi,
My version is SIP-bin-0.2 and scilab 2.6.

I tried with Scilab-2.7 and sip-bin-0.2
size(A)
ans =
! 161 200 3 !
just like you.

So, there's no problem anymore with this version. All right.

Maybe there can be a line in the README file: something like 

Known bugs 
Before acting on color images with Scilab-2.6, it's recommended to perform 
the following:
A = imread(your_image);
A(1,1,1)=A(1,1,1);
to get the correct image size.

Or maybe, just a copy the example that I sent.

This could save some time to newcomers in SIP.


Best regards
Jocelyn

Le Jeudi 11 Décembre 2003 21:15, vous avez écrit :
> Very strange...
>
> the very same example works with me:
>
> A=imread(SIPDIR+ímages/ararauna.jpg');
>
> size(A)
>  ans  =
>
>   !   161.    200.    3. !
>
>
> What version of scilab, SIP and operating system are you using?
>
> That test was made under Linux with scilab CVS.
> If you're using Linux, install the CVS version.
>
> cheers,
> Ricardo.
>
> On Thu, 11 Dec 2003, DRUEL Jocelyn wrote:
> > Hi,
> > I have a problem with the behaviour of color images:
> > Let's try:
> > A=imread(SIPDIR+'images/ararauna.jpg');
> > B=A;
> > B(1,1,1)=A(1,1,1);//this should not change anything
> > C=A.*B;//does not work (incompatibility in sizes)
> >
> > It's confirmed by:
> > size(A)
> > ! 161 !
> > ! 200 !
> > ! 3    !
> >
> > and size(B)
> > ! 161 200 3 !
> >
> > If I try this:
> > D=im2gray(A);
> > size(D) is
> > ! 161 200 !
> >
> > I think, it would cause less problems if size(A) was directly ! 161 200 3
> > ! because with the actual configuration, almost any action on A will
> > modify its size.
> >
> > Best regards
> > Jocelyn
>
> Ricardo.

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