# what aspect ratio, or pixel size I have to maintain to fully display it on TV ?

Discussion in 'Digital Photography' started by Mario, Jan 4, 2005.

1. ### MarioGuest

Hello,

Excuse me if I dont well explain my problem:

I take a digital pic of size: 3072 x 2304 pixel, it says it is 108,3 x
81,2 cm size.

The original pic is fully displayed well on the TV set from a CD

If I turn the pic around by 90 deg. or if I cut part of the original
pic it isnt anymore fully shown on the TV screen but the area is much
smaller.

What should I do to fill uo the entire TV screen as much as possible ?

What in the case of turning aroung the pic ?

What in the case I cut part of the pic ?

Mario

Mario, Jan 4, 2005

2. ### Rodrigo C.Guest

in the case you cut, you only have to maintain the convencional TV or
monitor aspect ratio, that is, 4:3
for example, if you crop a picture to 2000 pixels wide, you need 2000/4*3 =
1500 pixels high to fill the entire screen.

in the case that you turn the pic by 90 deg, you will have 3:4 aspect ratio
instead of 4:3, so you will have to do a mayor crop to fit in the screen and
probably you will miss an important portion of the picture.

Rodrigo C., Jan 4, 2005

3. ### Jim TownsendGuest

Your TV has an aspect ratio of 4:3

Your 3072 x 2340 image has an aspect ratio of 3:2

I imagine the image fits, but there is a small amount of empty screen
above and below the image. I also imagine that rotated imgages appear
much smaller and have a lot of empty screen on each side.

If you rotate the image, you'll have to crop some off the top and/or
bottom for it to fit. If you keep width at 2340 pixels, then the
hight will have to be cut from 3072 pixels to 1728 pixels.

This will result in an image that's 2340 x 1728 . It now as a 4:3
aspect ratio and will fit your TV screen. Of course this may not be
the best solution because it involves a drastic crop which will
no doubt cut off parts of the subject. Unfortunately I can't see any
other way of doing it.

Jim Townsend, Jan 4, 2005
4. ### PeteGuest

Turn your TV on its side

Pete, Jan 4, 2005
5. ### NostrobinoGuest

No it doesn't. His image is 3072x2304 and that's 4:3, but that isn't his
problem anyway. His problem is that he's rotated the image 90 degrees.

What he apparently wants to do (fill the screen with the rotated image)
can't be done without either severe cropping or drastically distorting the
image.

Apart from using the wrong first number (it's 2304, not 2340) you're right
of course. To fill the 4:3 screen with his 3072x2304 image rotated 90
degrees, he's going to have to crop it to 2304x1728. That means throwing
away about 44% of the image, which I doubt he wants to do.

N.

Nostrobino, Jan 4, 2005
6. ### Dave CohenGuest

Or take a hammer to it. My 1600x1200 pics do NOT display correctly on my tv
and if my arithmetic is correct 1600x1200 is 4x3. I don't know why this is.
Maybe it is my GE dvd player. I've posted this observation before but never
got an answer. If I burn to cd using MyDVD as a slide show everything is ok.
The problem by the way is vertical elongation which I can fix by re-sampling
to 640x420. Has the op tried re-sampling.
Dave Cohen

Dave Cohen, Jan 4, 2005
7. ### Hans-Georg MichnaGuest

LOL, this was the only correct answer to the 90° question. -)

Hans-Georg

Hans-Georg Michna, Jan 4, 2005
8. ### Jim TownsendGuest

You're absolutely right.. I stand corrected. I saw the 3072 and assumed it
was an image from a 10D, 300D or the like.. (They're 3072x2048)

Jim Townsend, Jan 4, 2005
9. ### NostrobinoGuest

Know what you mean, I do the same thing. (So many posts, so little time.)

N.

Nostrobino, Jan 4, 2005
10. ### Keith SheppardGuest

Jim

Excuse me for going off topic but your posting has set me thinking. My TV
does not have an aspect ratio of 4:3. Like an increasing number of TVs in
the UK it is 16:9, or "widescreen", format.

I wonder if any camera manufacturers have cottoned on to this trend and are
contemplated adding a widescreen option to their TV output. Is widescreen
TV purely a UK phenomenon or is it becoming common in other countries too?

Keith

Keith Sheppard, Jan 5, 2005
11. ### Hans-Georg MichnaGuest

Keith,

same in Germany and probably all over Europe.

I actually don't like it.

Hans-Georg

Hans-Georg Michna, Jan 5, 2005
12. ### OwamangaGuest

Yep, noticed that when I visited UK over Christmas, 5 out of 6 places
I went had switched to widescreen TV. Buggers up the viewing
experience because many channels are still transmitting in 4:3. Brits
are now conditioning themselves to seeing wide people, skinny people,
people that stretch as they get close to the edges of the screen and
have gained the capability to read a half-cropped ticker tape on the
news channels. They consider this normal, I find it highly annoying.
The button to change aspect ratio is often hidden inside a flap on the
remote too, meaning it's a secondary function.

Here in the US, people favor big-screen or High-Def TV's instead of
widescreen. I reckon about 90%+ are still 4:3 here, and at least 50%
of those are big-screen.

Owamanga, Jan 5, 2005
13. ### Ben ThomasGuest

It's all the rage down-under.

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Ben Thomas, Jan 5, 2005