On Jun 17, 5:03 am, rajani_sp <rajani...@[EMAIL PROTECTED]
> wrote:
> On Jun 17, 12:54 pm, Martin Leese <ple...@[EMAIL PROTECTED]
>
> wrote:
>
>
>
> > Arutperumjothi wrote:
> > > On Jun 17, 10:34 am, Martin Leese
<ple...@[EMAIL PROTECTED]
>
> > > wrote:
> > >> Arutperumjothi wrote:
> > >>> Hi all,
> > >>> I am new to image processing . i have two images taken with
different
> > >>> white balance adjustments.
> > >>> i need to compare this and say which one has more white balance .
Can
> > >>> anybody tell me how can I do this. I am trying out this with
Matrox
> > >>> image processing library and AForge.Net.
> > >> Don't understand. I understand what white
> > >> balance is. I don't understand what you
> > >> mean by "more white balance". I don't see
> > >> how white balance can be something you can
> > >> have more of.
> > > Sorry for not being clear in query.
> > > I have taken two images with web cam by white balance adjustments (
I
> > > guess i should be saying correcting white balance ) . I need to
> > > compare the two images. Please tell me how can i compare these two
> > > images.
>
> > Compare for what purpose? What is your
> > goal? Why do you want to do this?
>
> > Also, stuffing the two images on a website
> > somewhere and posting the link is always
> > helpful.
>
> > There are many ways to compare two images.
> > For example, you can just look at them.
>
> > --
> > Regards,
> > Martin Leese
> > E-mail: ple...@[EMAIL PROTECTED]
> > Web:http://members.tripod.com/martin_leese/-Hide
quoted text -
>
> > - Show quoted text -
>
> Hi,
>
> Thank you for the response. I have uploaded the images in the below
>
link.http://groups.google.com/group/aforge/web/WB-Levels-BeforeAfter.jpeg
> I have to compare the images and output the result as which of the
> images
> has the correct white balance. In the pictures in the above link we
> can see the
> second image looks more natural. Ofcourse manually we can see both
> images
> and say which of them is better. Similarly i compare the luminosity of
> the two images
> and say which one is brighter picture. Hope this is clear.
>
> Thanks
> Rajani
You can't determine which image has the correct white balance unless
you know the spectral response (i.e. color) of the objects in the
image. To say "manually we can see both images and say which of them
is better," assumes that you know a priori the color of the wall. If
the wall is painted a yellowish off-white, then the image on the left
is correct; if the wall is painted white, then the image on the right
is correct; if the wall is painted pink, then neither is correct.
Ed M
|
