Re: problem with 'imshow'

Dave Robinson wrote:


Ken Davis wrote:


"amelie" <amelie.quinet@xxxxxxxxxxxxxx> wrote in message
news:ef2a6d9.-1@xxxxxxxxxxxxxxxxxxx
Dear all,

I've got an image 480*640*3. I don't understand why, when I
write
:
imshow(image(:,:,1)) or
imshow(image(:,:,2)) or
imshow(image(:,:,3))
the images I observe are the same (color).

I want to observe red,blue and green components.

I tried with different images, and it's always the same
result.

Is it normal ?

Regards
Amélie

Red = MyImage(:,:,1)
Green = MyImage(:,:,2)

will produce two single plane images, which whilst Red will contain
the red information, & Green will contain the green information, if
you display either of these planes using imshow(Red) or
imshow(Green)
will both generate a greyscale image.

If you want them to display different colours then generate an
empty
buffer, the same size as your images

Buffer = zeros(rows,columns);

Now form the following

New_Red = cat(2,Red,Buffer,Buffer);
New_Green = cat(2,Buffer,Green,Buffer);
New_Blue = cat(2,Buffer,Buffer,Blue);

Hope that helps

Dave Robinson

Thanks !!
.

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