MATLAB Central Newsreader - Load avi files

Re: Load avi files

Vihang Patil — Thu, 07 Feb 2008 16:48:02 -0500

"Torvald Helmer" <torvald.helmer@mathworks.com> wrote in
message <foepsb$j2o$1@fred.mathworks.com>...
> I load an avi-file into matlab and it gets saved, in this
> case, in a 1x170 struct. Each block/cell inside the struct
> contains a cdata-field with 175x260x3 uint8.
>
> How can I get this in a variable of 175x260x170 double?

You cannot get a RGB image in the above said format. You can
get it in 4-D format

ex:
D(:,:,:,1) = mov(1,1).cdata;
D(:,:,:,2) = mov(1,2).cdata; so on and so forth

If you are going to convert the RGB image into grayscale or
binary then its possibe to have them stored in mxnxp format
as follows

D(:,:,:,1) = rgb2gray(mov(1,1).cdata);
D(:,:,:,2) = rgb2gray(mov(1,2).cdata);

and then use
D1 = squeeze(D);

HTH
VIhang

Re: Load avi files

nor ki — Thu, 07 Feb 2008 14:03:07 -0500

"Torvald Helmer" <torvald.helmer@mathworks.com> wrote in
message <foeu1e$nir$1@fred.mathworks.com>...
> Yumnam Kirani Singh <kirani.singh@gmail.com> wrote in
> message
>
<28418001.1202386452430.JavaMail.jakarta@nitrogen.mathforum.org>...
> > Do you mean you have 170x175x260x3 data, i.e, 170 image
> color frames of size 175x260?
>
>
> That is correct! I have a true color-video of 170 frames,
> with size 175x260...
>
> This will further on be converted to binary-image...

avidata = aviread(avifile);
newdatadouble = double(avidata.cdata);

Re: Load avi files

Torvald Helmer — Thu, 07 Feb 2008 12:37:02 -0500

Yumnam Kirani Singh <kirani.singh@gmail.com> wrote in
message
<28418001.1202386452430.JavaMail.jakarta@nitrogen.mathforum.org>...
> Do you mean you have 170x175x260x3 data, i.e, 170 image
color frames of size 175x260?

That is correct! I have a true color-video of 170 frames,
with size 175x260...

This will further on be converted to binary-image...

Re: Load avi files

Yumnam Kirani Singh — Thu, 07 Feb 2008 12:13:42 -0500

Do you mean you have 170x175x260x3 data, i.e, 170 image color frames of size 175x260?

Re: Load avi files

Malcolm Lidierth — Thu, 07 Feb 2008 11:50:03 -0500

That should be
x=double(structname(index).fieldname);

"Malcolm Lidierth" <ku.ca.lck@htreidil.mloclam> wrote in
message <foeqog$27i$1@fred.mathworks.com>...
> Try
> x=double(structname.fieldname);
>

Re: Load avi files

Malcolm Lidierth — Thu, 07 Feb 2008 11:41:04 -0500

Try
x=double(structname.fieldname);

Load avi files

Torvald Helmer — Thu, 07 Feb 2008 11:26:03 -0500

I load an avi-file into matlab and it gets saved, in this
case, in a 1x170 struct. Each block/cell inside the struct
contains a cdata-field with 175x260x3 uint8.

How can I get this in a variable of 175x260x170 double?