RGB2JPEG Coverts from RGB format to the YCbCr format used by JPEG
Usage: YCbCr = rgb2jpeg(RGB);
Input parameters:
RGB : 3d data-cube, containing RGB information of the image
Output parameters:
YCbCr : 3d data-cube, containing the YCbCr information of the
image
'rgb2jpeg(RGB)' performs a transformation of the 3d data-cube RGB with
dimensions N xM x3, which contains information of the
colours "red", "green" and "blue". The output variable YCbCr is a 3d
data-cube of the same size containing information about "luminance",
"chrominance blue" and "chrominance red". The output will be of
the uint8 type.
See http://en.wikipedia.org/wiki/YCbCr and
http://de.wikipedia.org/wiki/JPEG.
Examples:
---------
In the following example, the Lichtenstein test image is split into
its three components. The very first subplot is the original image:
f=lichtenstein;
f_jpeg=rgb2jpeg(f);
subplot(2,2,1);
image(f);axis('image');
Ymono=zeros(512,512,3,'uint8');
Ymono(:,:,1)=f_jpeg(:,:,1);
Ymono(:,:,2:3)=128;
fmono=jpeg2rgb(Ymono);
subplot(2,2,2);
image(fmono);axis('image');
Cbmono=zeros(512,512,3,'uint8');
Cbmono(:,:,2)=f_jpeg(:,:,2);
Cbmono(:,:,3)=128;
fmono=jpeg2rgb(Cbmono);
subplot(2,2,3);
image(fmono);axis('image');
Crmono=zeros(512,512,3,'uint8');
Crmono(:,:,3)=f_jpeg(:,:,3);
Crmono(:,:,2)=128;
fmono=jpeg2rgb(Crmono);
subplot(2,2,4);
image(fmono);axis('image');
Url: http://ltfat.github.io/doc/sigproc/rgb2jpeg.html
See also: jpeg2rgb.
Package: ltfat