Ray_Net wrote:
I have a big image 1852 pixels x 1852 pixels
When I use in html <img alt="xxxx" src="logo.jpg" height="79"
width="79" border="0"/>
The rendering by SM is superb
BUT using this have a side effect that when the end-user have this
picture on the web-page ... He downloaded the original picture
1852x1852 which is 2.042 KB
To avoid this, I use Irfanview to shrink the picture to a 79 pixels x
79 pixels so the end-user download this modified picture which is 14
KB
And the rendering of this picture <img alt="xxxx"
src="logo-small.jpg" height="79" width="79" border="0"/> by SM is
poor.
I wonder if perhaps the "79x79" image is actually being displayed at
more than 79x79 pixels on screen, giving better quality. Do you have the
zoom in SeaMonkey set to 100%? Or are you using a high-DPI monitor? I'm
not sure if certain CSS styling or other things might also affect the
scaling.
If, for example, SeaMonkey's zoom was set to 200%, I'd expect that image
to be displayed at 158x158 pixels. A large image scaled down to 158x158
pixels for display, is going to look better than a 79x79 pixel image
scaled up to 158x158.
Is it possible that SM download the logo.jpg picture - then applied
the reduction to 79x79 - then save this new file somewhere - before
showing it in the final page ?
Can I retrieve this picture.file ? Or have you another bright idea ?
As others have mentioned, the scaling algorithm used in your image
editor can have an impact on the final quality.
If you want to capture the image SeaMonkey actually displays, you should
be able to press "Print Screen" on the keyboard and paste into an image
editor. Or some image editors have a screen-capture function within the
application (GIMP does, at File > Create > Screen Shot, I don't know
about Irfanview). Then crop the screen capture to just the image you
want and save it. You'll also find out that way whether it's really
being displayed at 79x79 pixels on screen or something more.
--
Mark.
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