Had written a simplistic dct implementation some time back in 'C'. May
help.
http://piyushkaul.tripod.com/dct_c.zip. Optimized 2D-DCT implemention
src would also be available on net at many places.

Regarding using dct2. What problem are you having? The syntax is

B = dct2(A);

Can't possible get any simpler? Hope you are not using int8 etc.
types.

Regards
Piyush

On Aug 29, 5:04 pm, "jyothina" <jyothi.adiba...@wipro.com> wrote:
> Hi All,
>
> I am performing Integer DCT on Lena image.
> I am using " C "& i am not able to reconstruct the image correctly.
> Before applying DCT I am subtracting 128 from all pixels of input image.
> After IDCT i am adding 128 to the result image.
> I want to compare my results with MATLAB .
> Is anybody know how to use dct i.e. dct2 function of MATLAB?
> if anyone has the related code in MATLAB please do send to me.
> Thanks in Advance.
>
> Regards,
> Jyothi.

Hi All,

I am performing Integer DCT on Lena image.
I am using " C "& i am not able to reconstruct the image correctly.
Before applying DCT I am subtracting 128 from all pixels of input image.
After IDCT i am adding 128 to the result image.
I want to compare my results with MATLAB .
Is anybody know how to use dct i.e. dct2 function of MATLAB?
if anyone has the related code in MATLAB please do send to me.
Thanks in Advance.

Regards,
Jyothi.