Subject:
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Re: Switching from BITMAP/JPEG to PNG
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Newsgroups:
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lugnet.cad, lugnet.inst
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Date:
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Mon, 28 Apr 2003 18:37:48 GMT
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Viewed:
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1342 times
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In lugnet.cad, Kevin L. Clague writes:
> JPEG image format and the new callout capabilites in LPub (plus PLI background
> color non-white which I just fixed) are incompatible with JPEG because when you
> pack images together that are rendered with the same background color, not all
> the backgrounds look *exactly* the same.
>
> I'm going to add PNG support to LPub for building instructions and want to
> eliminate JPEG and BITMAP capabilities. This will simplify things in a *lot*
> of places in LPup. Those of us who authored books for Syngress using LPub used
> bitmap format because it was loss-less. For web publishing, JPEG is typically
> used because of reduced file size.
>
> PNG provides lossless compressed images. Rather than having to support all
> three formats bitmap, JPEG and PNG, I only want to support PNG.
>
> Any objections?
I don't necessarily object because I can completely see where you are coming
from. I will say though that recently in working with PNG in Photoshop, the
PNG images took MUCH longer for Photoshop to deal with them. I'm not sure
what was going on, but they took far long longer to open and to process than
their direct JPG and BMP equivalents. I also noticed that the BMPs seem to
compress down to almost nothing when Zipped, but the PNGs remain quite
large. (Important when you have limited hard drive space and are rendering
at print quality!)
For what it's worth. Again, I don't really object, just throwing a few other
things out to consider.
Jake
----
Jake McKee
LEGO Enthusiast
Webmaster - B.I. Portal
http://www.bricksonthebrain.com/instructions
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Message has 2 Replies:
 | | Re: Switching from BITMAP/JPEG to PNG
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| (...) That's because your machine needed to uncompress the PNG (unlike BMPs), and it had more information in it than a JPG, I believe. (...) BMPs are not compressed on disk - which is why they are huge to begin with, and compress to very very small. (...) (22 years ago, 28-Apr-03, to lugnet.cad, lugnet.inst)
| | | Re: Switching from BITMAP/JPEG to PNG
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| I've decided to keep the original two formats and add a third. Processing of the new layout layer of LPub must be done in either bitmap or PNG, because composite images made of JPEGs end up having the barground color change all over the place. I can (...) (22 years ago, 28-Apr-03, to lugnet.cad, lugnet.inst)
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Message is in Reply To:
| | Switching from BITMAP/JPEG to PNG
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| JPEG image format and the new callout capabilites in LPub (plus PLI background color non-white which I just fixed) are incompatible with JPEG because when you pack images together that are rendered with the same background color, not all the (...) (22 years ago, 21-Apr-03, to lugnet.cad, lugnet.inst)
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