Just pick up  the camera and take some photos. You are getting way to
technical about nothing.

"bagal" <alan_plc@hotmail.com> wrote in message
news:vutnc.240$DX2.49@newsfe1-gui.server.ntli.net...
> maybe i am casting pearls?
>
> "Pete D" <dont.use@email.to.reply> wrote in message
> news:jXlnc.29162$TT.19275@news-server.bigpond.net.au...
> > Wonderful.
> >
> > So what?
> >
> > "bagal" <alan_plc@hotmail.com> wrote in message
> > news:O74nc.78$Nc3.32@newsfe3-win.server.ntli.net...
> > : Hi I am new here and am looking for a discussion forum to sound out
some
> > : preconceptions I have about digital imaging.
> > :
> > : 1 - pixels have finite dimension (whatever it may be on PDA, computer
or
> > : large screen display a sports ground)
> > : implication:
> > : (a) digital image resolution is best optimised on a 1 to 1 basis
> > : therefore aiming for 6x4 or 7x5 prints with mucho megapixels is really
a
> > bit
> > : of over the top-ness
> > :
> > : (b) digital signal processing (in essence maths algorithms) are
> essential
> > if
> > : image reproduction move from a 1-2-1 display.  Why?  Well, if showing
a
> > 2000
> > : by 1000 images on a display of 4000 by 2000 either the pixels have to
be
> > : 'enlarged'  to fill 2 pixel places along and 2 pixel places up.  So in
> > this
> > : example 1 ordinary pixel now fills the space of 4 ordinary pixels  (I
> bet
> > : this is what is called pixellation)
> > :
> > : (b2) maybe there is another way - let's call it interpolation.
Instead
> of
> > 1
> > : image pixel filling the space taked by 4 display pixels we'll use a
bit
> of
> > : linear math to fill in the bits in between.  So the original image
> pixels
> > : now fill 1 display pixel space but they are surrounded by fill-in
values
> > : determined by a linear math algorithm.
> > :
> > : (c) going the other way, from a 2000 by 1000 image to a 300 by 200
> > display.
> > : Now we have far too many pixels in the image Rougly 5 times too many
So
> > the
> > : display shows 1 pixel from the image, discards the next 4 image pixels
> and
> > : so on ...  till the display space is filled.
> > :
> > : OK - what am I getting at?
> > :
> > : Well, the first thing is the importance of a bit of linear math,
Image
> > : processing algorithms seem pretty darned important.
> > :
> > : Then there are interference effects.  Remember all thos lovely
patterns
> > : generated by repeating certain equations again, again and again (it
used
> > to
> > : be called chaos or fractal math)  Well, there is a possibility that
> > : particular image patters might generate interference
> > :
> > : To me - speaking naively - this suggests that tonal as opposed to
colour
> > : display of images is the kernel of a good CCD.  Can it handle tonal
> > : variation as well as changes in hue and colour?
> > :
> > : ?
> > :
> > : the bagal
> > :
> > :
> >
> >
>
>