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Re: [O] Viewing pdf images
From: |
Eric S Fraga |
Subject: |
Re: [O] Viewing pdf images |
Date: |
Mon, 10 Apr 2017 18:06:22 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/26.0.50 (gnu/linux) |
On Monday, 10 Apr 2017 at 16:51, Eduardo Mercovich wrote:
> Hi Marvin.
>
>> I also agree that in terms of resolution (pix per inch ) pdf and
>> jpg are the same. However, pdf (and SVG) allow the image to be
>> scaled with little loss in image quality.
>
> Sorry to disagree, but again, pdf images can be vector (like svg)
> and infinitely scaled or raster (bitmap, as a jpg) and in this
> case the quality is on the file. The pdf format only adds and
> envelope around the original jpg image, or in the conversion it
> can be downscaled.
Totally correct.
And, further, pixels per inch (i.e. resolution) is a property of an
output (e.g. printer or screen) or input device (e.g. camera sensor),
not an inherent property of the bitmap image. A bitmap file simply has
a size which can be expressed as pixels x pixels. If you display an
image on a high resolution screen (without scaling) it will appear
smaller than if you display it on a lower resolution screen.
--
: Eric S Fraga (0xFFFCF67D), Emacs 26.0.50, Org release_9.0.5-385-g72fc2d
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