What a question, what a query... How are images stored in a pres?

M

Mike M.

If I take an image and make 4 copies of it on my hard disk, then insert
(embed) each one on a slide, does PowerPoint embed the image 4 times or can
it figure out it is the same image and just reference it once? Based upon
my testing it seems to know because the file size doesn't grow
appropriately.

Thanks.
 
E

Echo S

Now that I don't know. It's always seemed rather amazing to me.

--
Echo [MS PPT MVP]
http://www.echosvoice.com


Mike M. said:
I wonder how PowerPoint knows it is the same image since it has different
file names. Is something embedded in the image that identifies it?

Echo S said:
It can reference it once.

--
Echo [MS PPT MVP]
http://www.echosvoice.com


Mike M. said:
If I take an image and make 4 copies of it on my hard disk, then insert
(embed) each one on a slide, does PowerPoint embed the image 4 times
or
can
it figure out it is the same image and just reference it once? Based upon
my testing it seems to know because the file size doesn't grow
appropriately.

Thanks.
 
M

Mike M.

I wonder how PowerPoint knows it is the same image since it has different
file names. Is something embedded in the image that identifies it?

Echo S said:
It can reference it once.

--
Echo [MS PPT MVP]
http://www.echosvoice.com


Mike M. said:
If I take an image and make 4 copies of it on my hard disk, then insert
(embed) each one on a slide, does PowerPoint embed the image 4 times or can
it figure out it is the same image and just reference it once? Based upon
my testing it seems to know because the file size doesn't grow
appropriately.

Thanks.
 
M

Mike M.

Me too. Because each image format has different info in it but maybe they
all have enough to identify the image. I never thought about it before. Oh
well, I was just curious.

TTFN

Echo S said:
Now that I don't know. It's always seemed rather amazing to me.

--
Echo [MS PPT MVP]
http://www.echosvoice.com


Mike M. said:
I wonder how PowerPoint knows it is the same image since it has different
file names. Is something embedded in the image that identifies it?

Echo S said:
It can reference it once.

--
Echo [MS PPT MVP]
http://www.echosvoice.com


If I take an image and make 4 copies of it on my hard disk, then insert
(embed) each one on a slide, does PowerPoint embed the image 4 times or
can
it figure out it is the same image and just reference it once?
Based
upon
my testing it seems to know because the file size doesn't grow
appropriately.

Thanks.
 
E

Echo S

Well, you know how we occasionally see reports of pictures swapping
themselves out for other pictures? I wonder if sometimes it has something to
do with this feature.

--
Echo [MS PPT MVP]
http://www.echosvoice.com


Mike M. said:
Me too. Because each image format has different info in it but maybe they
all have enough to identify the image. I never thought about it before. Oh
well, I was just curious.

TTFN

Echo S said:
Now that I don't know. It's always seemed rather amazing to me.

--
Echo [MS PPT MVP]
http://www.echosvoice.com


Mike M. said:
I wonder how PowerPoint knows it is the same image since it has different
file names. Is something embedded in the image that identifies it?

It can reference it once.

--
Echo [MS PPT MVP]
http://www.echosvoice.com


If I take an image and make 4 copies of it on my hard disk, then insert
(embed) each one on a slide, does PowerPoint embed the image 4
times
or
can
it figure out it is the same image and just reference it once? Based
upon
my testing it seems to know because the file size doesn't grow
appropriately.

Thanks.
 
M

Mike M.

I am having a problem with that exact thing in the Microsoft PowerPoint
Viewer for Windows CE. It is from a company called Westtek and it seems to
have problems. When I insert 3 or more images, size them to fill each slide
it causes images in later slides to not show. If I size the images to
approximately 80% of the slide size they all show. I can recreate the
problem with 4 slides/images but when I don't have them fill the slide I
have tested 30 slides/30 images with no problems. What is funny is I had
about 20 slides with 3 images in a repeating pattern. I deleted the image
in the first slide and inserted a fourth image. After that, each slide with
the deleted image showed with a blank background. It is like it destroyed
the reference to the image or something. I sent in a bug report and I am
waiting to hear a response. Whew, that was a lot of talking. <Cockney
Accent ON> Time to nip off for a wee bit of the wet stuff for me parched
throat. </Cockney Accent ON>


Echo S said:
Well, you know how we occasionally see reports of pictures swapping
themselves out for other pictures? I wonder if sometimes it has something to
do with this feature.

--
Echo [MS PPT MVP]
http://www.echosvoice.com


Mike M. said:
Me too. Because each image format has different info in it but maybe they
all have enough to identify the image. I never thought about it before. Oh
well, I was just curious.

TTFN

Echo S said:
Now that I don't know. It's always seemed rather amazing to me.

--
Echo [MS PPT MVP]
http://www.echosvoice.com


I wonder how PowerPoint knows it is the same image since it has different
file names. Is something embedded in the image that identifies it?

It can reference it once.

--
Echo [MS PPT MVP]
http://www.echosvoice.com


If I take an image and make 4 copies of it on my hard disk, then
insert
(embed) each one on a slide, does PowerPoint embed the image 4 times
or
can
it figure out it is the same image and just reference it once? Based
upon
my testing it seems to know because the file size doesn't grow
appropriately.

Thanks.
 
E

Echo S

LOL!

I hope you get that Viewer thing worked out. That sounds nasty!
--
Echo [MS PPT MVP]
http://www.echosvoice.com


Mike M. said:
I am having a problem with that exact thing in the Microsoft PowerPoint
Viewer for Windows CE. It is from a company called Westtek and it seems to
have problems. When I insert 3 or more images, size them to fill each slide
it causes images in later slides to not show. If I size the images to
approximately 80% of the slide size they all show. I can recreate the
problem with 4 slides/images but when I don't have them fill the slide I
have tested 30 slides/30 images with no problems. What is funny is I had
about 20 slides with 3 images in a repeating pattern. I deleted the image
in the first slide and inserted a fourth image. After that, each slide with
the deleted image showed with a blank background. It is like it destroyed
the reference to the image or something. I sent in a bug report and I am
waiting to hear a response. Whew, that was a lot of talking. <Cockney
Accent ON> Time to nip off for a wee bit of the wet stuff for me parched
throat. </Cockney Accent ON>


Echo S said:
Well, you know how we occasionally see reports of pictures swapping
themselves out for other pictures? I wonder if sometimes it has
something
to
do with this feature.

--
Echo [MS PPT MVP]
http://www.echosvoice.com


Mike M. said:
Me too. Because each image format has different info in it but maybe they
all have enough to identify the image. I never thought about it
before.
Oh
well, I was just curious.

TTFN

Now that I don't know. It's always seemed rather amazing to me.

--
Echo [MS PPT MVP]
http://www.echosvoice.com


I wonder how PowerPoint knows it is the same image since it has
different
file names. Is something embedded in the image that identifies it?

It can reference it once.

--
Echo [MS PPT MVP]
http://www.echosvoice.com


If I take an image and make 4 copies of it on my hard disk, then
insert
(embed) each one on a slide, does PowerPoint embed the image 4 times
or
can
it figure out it is the same image and just reference it once?
Based
upon
my testing it seems to know because the file size doesn't grow
appropriately.

Thanks.
 
M

Mike M.

Thanks. Not as bad as say a sauteed Sea Worm. ;-)

Echo S said:
LOL!

I hope you get that Viewer thing worked out. That sounds nasty!
--
Echo [MS PPT MVP]
http://www.echosvoice.com


Mike M. said:
I am having a problem with that exact thing in the Microsoft PowerPoint
Viewer for Windows CE. It is from a company called Westtek and it seems to
have problems. When I insert 3 or more images, size them to fill each slide
it causes images in later slides to not show. If I size the images to
approximately 80% of the slide size they all show. I can recreate the
problem with 4 slides/images but when I don't have them fill the slide I
have tested 30 slides/30 images with no problems. What is funny is I had
about 20 slides with 3 images in a repeating pattern. I deleted the image
in the first slide and inserted a fourth image. After that, each slide with
the deleted image showed with a blank background. It is like it destroyed
the reference to the image or something. I sent in a bug report and I am
waiting to hear a response. Whew, that was a lot of talking. <Cockney
Accent ON> Time to nip off for a wee bit of the wet stuff for me parched
throat. </Cockney Accent ON>


Echo S said:
Well, you know how we occasionally see reports of pictures swapping
themselves out for other pictures? I wonder if sometimes it has
something
to
do with this feature.

--
Echo [MS PPT MVP]
http://www.echosvoice.com


Me too. Because each image format has different info in it but
maybe
they
all have enough to identify the image. I never thought about it before.
Oh
well, I was just curious.

TTFN

Now that I don't know. It's always seemed rather amazing to me.

--
Echo [MS PPT MVP]
http://www.echosvoice.com


I wonder how PowerPoint knows it is the same image since it has
different
file names. Is something embedded in the image that identifies it?

It can reference it once.

--
Echo [MS PPT MVP]
http://www.echosvoice.com


If I take an image and make 4 copies of it on my hard disk, then
insert
(embed) each one on a slide, does PowerPoint embed the image 4
times
or
can
it figure out it is the same image and just reference it once?
Based
upon
my testing it seems to know because the file size doesn't grow
appropriately.

Thanks.
 

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