Keynote/PowerPoint confusion

I will probably die without ever truly understanding digital photo
resolution, but maybe someone can help with this problem:

I am just beginning to learn how to use Keynote, which is the Apple
version of PowerPoint. What I don't understand is how large images
should be. For example, I want to use an image that was scanned at 300
dpi, and measures 2360 X 1528 pixels. When I import it into Keynote,
is is converted into an image that measures 926 X 600 pixels, still
too big for the slide, which is 800 X 600 pixels.

Should I:

A. Resize the image within Keynote so it fits in the slide?

B. Resize it within Photoshop so that it is no more than 800 pixels
wide, save it, and import it into Keynote?

C. Resize it and compress it ("Save for Web") with Photoshop, save it,
and import the compressed image into Keynote?

So far, I have used method C, but that seems to result in images that
don't seem very sharp on my monitor. Your help will be greatly
appreciated.

Thanks,

Bob

On Mon, 19 Nov 2007 09:14:47 -0800 (PST), b.ingraham@shaw.ca <b.ingraham@shaw.ca> wrote:
> I will probably die without ever truly understanding digital photo
> resolution, but maybe someone can help with this problem:
>
> I am just beginning to learn how to use Keynote, which is the Apple
> version of PowerPoint. What I don't understand is how large images
> should be. For example, I want to use an image that was scanned at 300
> dpi, and measures 2360 X 1528 pixels. When I import it into Keynote,
> is is converted into an image that measures 926 X 600 pixels, still
> too big for the slide, which is 800 X 600 pixels.
>
> Should I:
>
> A. Resize the image within Keynote so it fits in the slide?
>
> B. Resize it within Photoshop so that it is no more than 800 pixels
> wide, save it, and import it into Keynote?
>
> C. Resize it and compress it ("Save for Web") with Photoshop, save it,
> and import the compressed image into Keynote?
>
> So far, I have used method C, but that seems to result in images that
> don't seem very sharp on my monitor. Your help will be greatly
> appreciated.

I would go with A unless the file size of the Keynote presentation
becomes too big for comfort, in which case I'd fall back to B. Or, as a
compromise, resample it to maybe 1200 or so pixels wide in Photoshop,
and then size it down in Keynote to fit onto the slide.

-dms

>
> I would go with A unless the file size of the Keynote presentation
> becomes too big for comfort, in which case I'd fall back to B. Or, as a
> compromise, resample it to maybe 1200 or so pixels wide in Photoshop,
> and then size it down in Keynote to fit onto the slide.
>
> -dms

What is "too big for comfort" in this case? The file I'm working with
is currently 4.4 Mb, and includes 65 images. I think that says that
the images are way too small for projection. Right?

Bob

b.ingraham@shaw.ca wrote:
> I will probably die without ever truly understanding digital photo
> resolution, but maybe someone can help with this problem:
>
> I am just beginning to learn how to use Keynote, which is the Apple
> version of PowerPoint. What I don't understand is how large images
> should be. For example, I want to use an image that was scanned at 300
> dpi, and measures 2360 X 1528 pixels. When I import it into Keynote,
> is is converted into an image that measures 926 X 600 pixels, still
> too big for the slide, which is 800 X 600 pixels.
>
> Should I:
>
> A. Resize the image within Keynote so it fits in the slide?
That is the fastest approach, and it probably works well enough.
>
> B. Resize it within Photoshop so that it is no more than 800 pixels
> wide, save it, and import it into Keynote?

Takes a lot longer, and probably won't matter.
>
> C. Resize it and compress it ("Save for Web") with Photoshop, save it,
> and import the compressed image into Keynote?

Why do you want to compress it? You'll lose some quality.
>
> So far, I have used method C, but that seems to result in images that
> don't seem very sharp on my monitor. Your help will be greatly
> appreciated.

Any resizing to a smaller pixel count will lose some
resolution. Compressing made the image quality worse.
> Thanks,
>
> Bob

b.ingraham@shaw.ca wrote:
>> I would go with A unless the file size of the Keynote presentation
>> becomes too big for comfort, in which case I'd fall back to B. Or, as a
>> compromise, resample it to maybe 1200 or so pixels wide in Photoshop,
>> and then size it down in Keynote to fit onto the slide.
>>
>> -dms
>
> What is "too big for comfort" in this case? The file I'm working with
> is currently 4.4 Mb, and includes 65 images. I think that says that
> the images are way too small for projection. Right?
>
> Bob
>
Average image size is 4.4K. Icons can be that large.

On Mon, 19 Nov 2007 11:12:55 -0800 (PST), b.ingraham@shaw.ca <b.ingraham@shaw.ca> wrote:
>
>>
>> I would go with A unless the file size of the Keynote presentation
>> becomes too big for comfort, in which case I'd fall back to B. Or, as a
>> compromise, resample it to maybe 1200 or so pixels wide in Photoshop,
>> and then size it down in Keynote to fit onto the slide.
>>
>> -dms
>
> What is "too big for comfort" in this case? The file I'm working with
> is currently 4.4 Mb, and includes 65 images. I think that says that
> the images are way too small for projection. Right?

That's up to you. If the file is going to reside on a laptop, then it's
probably not an issue (though bigger files will take longer to read and
save). If you might have to email it to someone, total size is probably
more important.

-dms

b.ingraham@shaw.ca wrote:

> Should I:
> A. Resize the image within Keynote so it fits in the slide?
> B. Resize it within Photoshop so that it is no more than 800 pixels
> wide, save it, and import it into Keynote?
> C. Resize it and compress it ("Save for Web") with Photoshop, save it,
> and import the compressed image into Keynote?
>
> Daniel Silevitch wrote:
>> I would go with A unless the file size of the Keynote presentation
>> becomes too big for comfort, in which case I'd fall back to B. Or, as a
>> compromise, resample it to maybe 1200 or so pixels wide in Photoshop,
>> and then size it down in Keynote to fit onto the slide.
>
> What is "too big for comfort" in this case? The file I'm working with
> is currently 4.4 Mb, and includes 65 images. I think that says that
> the images are way too small for projection. Right?

Better projectors tend to be 1024 pixels wide (last time I checked a few
years ago). If it shows what you need cropped to 2/3 aspect ratio, crop
the edge(s), resize then sharpen and save as high quality jpeg to the
max resolution of your projector, either 1024 or 800 wide most likely or
use 1024x768 if you don't know.

I have no idea how keynote works but it seems to accept compressed jpegs
given your file sizes & numbers (65K per image). If you aren't emailing
this or putting it up on the web, don't compress the images: save as max
quality jpeg or tiff or bmp.

Thanks to everyone who responded. I think I'm getting a better handle
on this stuff. Looks like I'll be exporting my current Keynote effort,
photos that I took during the Vietnam War, to an HTML file and
uploading it to my web site. I'll post the link when it's ready.

Bob