Re: png question

Craig,

Absolutely. It has been available for several versions now.


-- 
Foster D. Coburn III
Unleashed Productions, Inc.
http://www.unleash.com -- The Ultimate Resource for the Graphics User
Tips & Tricks, Training Classes, Books, Videos and much more
Attend a CorelDRAW X3 Boot Camp led by
Foster Coburn on April 12-14, 2007 or April 19-21, 2007
http://www.unleash.com/training/coreldrawbootcamp.asp

just wondering if anyone knows if it is possible to export an image as a png 
file with 8-bit alpha mask in PP 12.  thanks!! 

Hi Phil,

some info here:

http://www.libpng.org/pub/png/pngintro.html

jpeg compression is lossy, PNG isn't.

The destructive nature of downsampling is a very different issue 
compared to compression.

It can be very useful to send graphic elements without backgrounds to 
other designers or for local archival.

One could save BMP's without any compression at all, but why? PNG's will 
chop those files down to at least half and without loss. this means 
double the download speed or twice the storage capacity of files 
compared to BMP.

JD

Philip K. wrote:
> Hi Foster,
>    What is the point of the PNG format.
> 1.  The compression does not amount to much more than PKZIP.  It seems to
be 
> about 2 to 1.
> 2.  JPEG gets me ten to one with hardly any degradation.  Bringing the
pixel 
> by pixel dimensions down to monitor size degrades the quality of the image

> more than the JPEG conversion.
> 3.  Why would I want to send masks and layers (?) over the internet
anyhow.
> 4.  Why use compression for personal storage.  I recently bought a 250
GByte 
> external drive for $150 and I make backups on a double layer DVD (13
GBytes) 
> for under one dollar.
>     So why use PNG?
> Phil
> 
> 
> 
> "Foster D. Coburn III" <foster--remove--@unleash.com> wrote
in message 
> news:46006c4b$1_2@cnews...
>> Craig,
>>
>> Absolutely. It has been available for several versions now.
>>
>>
>> -- 
>> Foster D. Coburn III
>> Unleashed Productions, Inc.
>> http://www.unleash.com -- The Ultimate Resource for the Graphics User
>> Tips & Tricks, Training Classes, Books, Videos and much more
>> Attend a CorelDRAW X3 Boot Camp led by
>> Foster Coburn on April 12-14, 2007 or April 19-21, 2007
>> http://www.unleash.com/training/coreldrawbootcamp.asp
>>
>>
>>
> 
> 
> 

Phil,

Maybe for the pictures you use they aren't useful.

Let's see. PNG is the only format that allows a full alpha channel on the 
Web.

PNG is the native format of MS Office so it is a great way to bring in 
masked images to Word, PowerPoint, etc.

If you use the paletted flavor, PNG is typically smaller than GIF.

PNG supports a gamma setting.

As for JPEG, anyone who has taken my class knows that I have nothing good to 
say about it. If you want to use it to destroy images, go for it. JPEG is 
ONLY good for putting small photos on the Web. Beyond that, it is overhyped 
and overused. As you say, hard drives are cheap so why use lossy compression 
when you can use lossless?


-- 
Foster D. Coburn III
Unleashed Productions, Inc.
http://www.unleash.com -- The Ultimate Resource for the Graphics User
Tips & Tricks, Training Classes, Books, Videos and much more
Attend a CorelDRAW X3 Boot Camp led by
Foster Coburn on April 12-14, 2007 or April 19-21, 2007
http://www.unleash.com/training/coreldrawbootcamp.asp

Hi Foster,
   What is the point of the PNG format.
1.  The compression does not amount to much more than PKZIP.  It seems to be 
about 2 to 1.
2.  JPEG gets me ten to one with hardly any degradation.  Bringing the pixel 
by pixel dimensions down to monitor size degrades the quality of the image 
more than the JPEG conversion.
3.  Why would I want to send masks and layers (?) over the internet anyhow.
4.  Why use compression for personal storage.  I recently bought a 250 GByte 
external drive for $150 and I make backups on a double layer DVD (13 GBytes) 
for under one dollar.
    So why use PNG?
Phil



"Foster D. Coburn III" <foster--remove--@unleash.com> wrote in
message 
news:46006c4b$1_2@cnews...
>
> Craig,
>
> Absolutely. It has been available for several versions now.
>
>
> -- 
> Foster D. Coburn III
> Unleashed Productions, Inc.
> http://www.unleash.com -- The Ultimate Resource for the Graphics User
> Tips & Tricks, Training Classes, Books, Videos and much more
> Attend a CorelDRAW X3 Boot Camp led by
> Foster Coburn on April 12-14, 2007 or April 19-21, 2007
> http://www.unleash.com/training/coreldrawbootcamp.asp
>
>
>