I have a mobile, a new tablet and an old tablet.
Is the resolution of their front and back cameras stored in their data
ot do I have to go searching?

--
Jim the Geordie

In article <MPG.3d9baebbd706a8549896c7@reader.eternal-september.org>,
Jim the Geordie <jim@jimXscott.co.uk> wrote:

> I have a mobile, a new tablet and an old tablet.
> Is the resolution of their front and back cameras stored in their data
> ot do I have to go searching?

use <https://exiftool.org> to dump all of the exif data and see exactly
what is included.

nospam <nospam@nospam.invalid> wrote:
> In article <MPG.3d9baebbd706a8549896c7@reader.eternal-september.org>,
> Jim the Geordie <jim@jimXscott.co.uk> wrote:
>
> > I have a mobile, a new tablet and an old tablet.
> > Is the resolution of their front and back cameras stored in their data
> > ot do I have to go searching?
>
> use <https://exiftool.org> to dump all of the exif data and see exactly
> what is included.

Does the EXIF data include the maximum resolution of the camera, in
addition to the set resolution?

If not, Jim might as well just use File Explorer's (right-click)
Properties -> 'Details' tab, or hover over the thumbnails. Both will
display the "Dimensions <X> x <Y>" (or "<Y> x <X>") in pixels.

In article <tgsl83.2nc.1@ID-201911.user.individual.net>, Frank Slootweg
<this@ddress.is.invalid> wrote:

> > > I have a mobile, a new tablet and an old tablet.
> > > Is the resolution of their front and back cameras stored in their data
> > > ot do I have to go searching?
> >
> > use <https://exiftool.org> to dump all of the exif data and see exactly
> > what is included.
>
> Does the EXIF data include the maximum resolution of the camera, in
> addition to the set resolution?

exiftool will show everything the camera writes to exif. if what he
wants to see is not there, then the camera didn't write it.

also keep in mind that resolution (dpi/ppi) only matters when printing.
for on-screen viewing, it's meaningless.

> If not, Jim might as well just use File Explorer's (right-click)
> Properties -> 'Details' tab, or hover over the thumbnails. Both will
> display the "Dimensions <X> x <Y>" (or "<Y> x <X>") in pixels.

dimension is often confused with resolution but either way, that only
shows a subset of what's there.

In article <260920221059264545%nospam@nospam.invalid>,
nospam@nospam.invalid says...
>
> In article <tgsl83.2nc.1@ID-201911.user.individual.net>, Frank Slootweg
> <this@ddress.is.invalid> wrote:
>
> > > > I have a mobile, a new tablet and an old tablet.
> > > > Is the resolution of their front and back cameras stored in their data
> > > > ot do I have to go searching?
> > >
> > > use <https://exiftool.org> to dump all of the exif data and see exactly
> > > what is included.
> >
> > Does the EXIF data include the maximum resolution of the camera, in
> > addition to the set resolution?
>
> exiftool will show everything the camera writes to exif. if what he
> wants to see is not there, then the camera didn't write it.
>
> also keep in mind that resolution (dpi/ppi) only matters when printing.
> for on-screen viewing, it's meaningless.
>
> > If not, Jim might as well just use File Explorer's (right-click)
> > Properties -> 'Details' tab, or hover over the thumbnails. Both will
> > display the "Dimensions <X> x <Y>" (or "<Y> x <X>") in pixels.
>
> dimension is often confused with resolution but either way, that only
> shows a subset of what's there.

All I want is to find which of the 6 possible cameras gives me the best
results when the image is enlarged.
Might as well look up the handbook sif I can find them.

--
Jim the Geordie

In article <MPG.3d9c00e33dc675a9896c9@reader.eternal-september.org>,
Jim the Geordie <jim@jimXscott.co.uk> wrote:

> All I want is to find which of the 6 possible cameras gives me the best
> results when the image is enlarged.

one easy way to find out. take various photos with each camera and see
which one you prefer.

note that one camera might be better in some situations while a
different camera is best in others. for example, night scenes will
almost always look better with a camera that has lower noise, even if
the resolution is less. in bright daylight, most cameras will do well.
some cameras have a lot of post-processing, which generally works well
but there are situations where it doesn't.

In article <260920221442297495%nospam@nospam.invalid>,
nospam@nospam.invalid says...
>
> In article <MPG.3d9c00e33dc675a9896c9@reader.eternal-september.org>,
> Jim the Geordie <jim@jimXscott.co.uk> wrote:
>
> > All I want is to find which of the 6 possible cameras gives me the best
> > results when the image is enlarged.
>
> one easy way to find out. take various photos with each camera and see
> which one you prefer.
>
> note that one camera might be better in some situations while a
> different camera is best in others. for example, night scenes will
> almost always look better with a camera that has lower noise, even if
> the resolution is less. in bright daylight, most cameras will do well.
> some cameras have a lot of post-processing, which generally works well
> but there are situations where it doesn't.

Thanks.
In the process of doing that.
I have already found from experience that my mobile camera is much
better than my expensive camera in low light conditions.
However I looked up all the specs on the web and was surprised to see
that the front (selfie) camera on my mobile has much higher resolution
than the rear one.

--
Jim the Geordie

On 27/09/2022 01:07, Jim the Geordie wrote:
> Thanks.
> In the process of doing that.
> I have already found from experience that my mobile camera is much
> better than my expensive camera in low light conditions.
> However I looked up all the specs on the web and was surprised to see
> that the front (selfie) camera on my mobile has much higher resolution
> than the rear one.

Jim,

Your expensive camera might be better in low-light conditions if you applied
the same processing. In low-light conditions, my phone camera takes several
shots totalling up to 30 seconds total exposure, aligns the images, and then
combines them likely also applying some noise reduction.

You might be able to compare actual results on the DP Review camera comparison
site, although I don't know what or how many phone cameras they measure.

Particularly on phones, just number of pixels isn't the only factor - small
lenses let in less light, and are operated nearer to the diffraction limit.
--
Cheers,
David
Web: https://www.satsignal.eu

Jim the Geordie <jim@jimXscott.co.uk> wrote:

> I have a mobile, a new tablet and an old tablet.
> Is the resolution of their front and back cameras stored in their data
> ot do I have to go searching?

Do an online search on "<brand> <model> specs" to find sites with
articles giving the specs for your unidentified brand and model of
devices. Even the maker of the phone probably has a home page for that
brand and model where you can find the specs.

Also, the camera app should let you pick from several resolutions, and
those are what you get to use with that app. My camera app that came
bundled on the phone have only 1 set of resolutions, and whichever is
picked is used from both front and back cameras.

Jim the Geordie <jim@jimXscott.co.uk> wrote:
>
> I have a mobile, a new tablet and an old tablet.
> Is the resolution of their front and back cameras stored in their data
> ot do I have to go searching?

Open the files in a photo editor and see the dimensions in pixels. The
resolution is simply width x height.

File metadata should also have the dimensions. Windows file manager should
show those for you.

In article <tgu6m0$hbb$1@dont-email.me>, Chris <ithinkiam@gmail.com>
wrote:

> > I have a mobile, a new tablet and an old tablet.
> > Is the resolution of their front and back cameras stored in their data
> > ot do I have to go searching?
>
> Open the files in a photo editor and see the dimensions in pixels. The
> resolution is simply width x height.

resolution is ppi (often confused with dpi), which only matters for
printing. image dimensions is not the same thing. they are separate
exif tags.

nospam <nospam@nospam.invalid> wrote:
> In article <tgu6m0$hbb$1@dont-email.me>, Chris <ithinkiam@gmail.com>
> wrote:
>
> > > I have a mobile, a new tablet and an old tablet.
> > > Is the resolution of their front and back cameras stored in their data
> > > ot do I have to go searching?
> >
> > Open the files in a photo editor and see the dimensions in pixels. The
> > resolution is simply width x height.
>
> resolution is ppi (often confused with dpi), which only matters for
> printing. image dimensions is not the same thing. they are separate
> exif tags.

Yes, strictly speaking resolution is ppi, but everybody, including
manufacturers, including Apple, says 'resolution' when talking about the
number of horizontal and vertical pixels.

Actually, 'dimensions' is a misnomer, because it implies physical
size, which it isn't.

In article <tgv0pp.3tk.1@ID-201911.user.individual.net>, Frank Slootweg
<this@ddress.is.invalid> wrote:

> > > > I have a mobile, a new tablet and an old tablet.
> > > > Is the resolution of their front and back cameras stored in their data
> > > > ot do I have to go searching?
> > >
> > > Open the files in a photo editor and see the dimensions in pixels. The
> > > resolution is simply width x height.
> >
> > resolution is ppi (often confused with dpi), which only matters for
> > printing. image dimensions is not the same thing. they are separate
> > exif tags.
>
> Yes, strictly speaking resolution is ppi, but everybody, including
> manufacturers, including Apple, says 'resolution' when talking about the
> number of horizontal and vertical pixels.

that's true, and not just for photos, but also displays, where it can
really be confusing with hi-dpi displays that render multiple pixels
per point (which is not always 2x). for printing, ppi/dpi is often used
interchangeably. that doesn't mean it's correct.

exif includes two pairs of tags: image width & height and x & y
resolution.

> Actually, 'dimensions' is a misnomer, because it implies physical
> size, which it isn't.

physical size requires it to be a physical print, which is measured in
inches/mm or by a standard paper size (e.g., a4). dimensions is an
acceptable term for the width/height in pixels of a jpg/raw image.