On Tue, 3 Feb 2004 16:04:59 +0800 (SGT) Didier Casse <[EMAIL PROTECTED]>
babbled:
>
> Hello dear raster et al,
> I have a small question to ask concerning the Epeg
> program:,
>
> In epeg_main.c, there's this line:
>
> -> epeg_quality_set (im, 75);
>
> Just let me know if i understand it correctly! This "75", does it mean
> that the new image/thumbmail would have a quality of 75% as compared
> to it's original image? Is it some kind of reduction factor?
no. its the jpeg encoding quality. ie "75 = 75%" "100=100%" "25=25%" etc. its
the quality of thew jpeg encoding itself - it more jpeg "artifacts" will occur
the lower the quality level. this is completely separate from the scaling.
remember epeg gives up some quality on the scaling front to achieve speed. if u
want quality bar none, use imlib2. it will still beat imagemagick by a long shot
in speed, but keep quality too for the scaling pipeline.
> I notice that when I thumbnail, I get an image quality which is a bit
> poor as compared to when I thumbnail with the Imagemagick package.
>
> To have a good quality image do I need to set it to "100" or more? Or is
> there something else to set?
>
> Note that I'm not reducing my image not really to a small size
> but rather to something like 600x450! (Well not quite a thumbnail!)
>
>
> You might ask why on Earth I want to reduce to such a figure! Well I wrote
> this small program last year called ewebfoto [Nothing to do with the E
> project]
>
> (http://www.microtronyx.com/ewebfoto)
>
> which can put a directory (or several directories) of pictures/digital
> camera photos on the web. Sort of an image gallery generator. :-)
> It saves you the hassle of coding in html if you have something like 100
> over pics to put on the web!
>
> The driving engine ewebfoto is the Imagemagick package. Since there's
> now Epeg, I intend to replace my Imagemagick package to Epeg so that my
> ewebfoto runs faster and would be able to handle more Digi cam
> Photos!
hehehe good plan! :) you should get a good hmm 20-50 times speedup from my
experience with imagemagick.
>
>
> With kind regards,
>
> Didier.
>
> ---
> PhD student.
>
> Singapore Synchrotron Light Source (SSLS)
> 5 Research Link,
> Singapore 117603
>
> Email: slsbdfc at nus dot edu dot sg /
> didierbe at sps dot nus dot edu dot sg
>
>
>
>
>
>
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--
------------- Codito, ergo sum - "I code, therefore I am" --------------
The Rasterman (Carsten Haitzler) [EMAIL PROTECTED]
熊耳 - 車君 (数田) [EMAIL PROTECTED]
Tokyo, Japan (東京 日本)
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