I am making images for a web site, and silly me thought it would be a good idea
to use transparency so the image could have a nice shadow. I didn't realize the
ramifications of this choice until today. But here I am, and no one will die,
so I am going to try to make the best of it.
I skimmed the archives, read over
http://imagemagick.org/Usage/formats/#png_quality, installed pngcrush and
optipng, saw the note about pngnq and semi-transparent which scared me away.
I have been trying this and that for a few hours, currently am using convert ...
-quality 90 foo.png; optipng foo.png
And yet, my images are still 500k to 2mb, and I have about 20 of them, which
means someone surfing my site will have to dl about 20mb of images.
I have not yet started experimenting with things "recommended for small
thumbnail images" but will go down that path as soon as I post this.
What I am hoping for is someone can take a look at the types of images I am
working with and give me some "I would use theses options" advice. I made a
page that is just the images, each image being a link to it's master image.
http://www.chicagomidwestwineshow.com/imgwork/headers/
Below is the script of convert commands I use.
Carl
ps, if you have looked over the page of pictures, you probably get the theme:
wine. I need 5 more. If anyone has anything I can use on a commercial site,
and you or your friends are in Chicago, I can offer up tickets to the event.
Anthony, if you can make it over here, you have more than earned your admission
:)
# mkhead.sh
# takes one input file, makes one header
# find /home/juser/wineshow/static/img/flkr/cropped/ \( -iname "*.jpg" -or
-iname "*.png" \) -exec /home/juser/wineshow/imgwork/converts/mkhead.sh {} \;
set -ex
COLOR="#84815b"
# LOGO=../../static/img/logos/08WineShowLogo.gif
LOGO=/home/juser/wineshow/static/img/logos/08WineShowLogo.gif
CROPPED=$(basename $1)
EXT=png
FINAL=${CROPPED%.*}.$EXT
# get the source file
cp $1 $CROPPED
# make a green box, left side rounded corners
if [ ! -f header1.png ]; then
convert -size 200x165 xc:$COLOR \
xc:none -fill $COLOR \
-draw 'roundRectangle 0,0 415,165 20,20' \
logo: -compose SrcIn -composite \
header1.png
# display header1.png
fi
# make a transparent logo
if [ ! -f 08WineShowLogo_a.png ]; then
# convert 08WineShowLogo.eps -trim +repage 08WineShowLogo.png
convert $LOGO -transparent white -resize 1000x150 08WineShowLogo_a.png
fi
# make a green->transparent gradiant that will be overlayed onto the 'wine pic'
if [ ! -f header2.png ]; then
convert -size 165x600 gradient:$COLOR-none -rotate -90 header2.png
# display header2.png
fi
# put the gradiant on top of the image
convert $CROPPED \
-scale x165 \
header2.png -composite \
header3.png
# display header3.png
# add the 2 halfs together
# add logo.
convert header1.png header3.png +append \
08WineShowLogo_a.png -geometry +25+5 -composite \
header4.png
# display header4.png
# add a shaddow around the whole thing
convert header4.png \( +clone -background black -shadow 80x3+5+5 \) +swap \
-background none -flatten \
-quality 90 \
header5.$EXT
ls -sh header5.$EXT
# display header5.$EXT
# copy the file to it's final home
cp header5.png /home/juser/wineshow/static/img/flkr/final/$FINAL
optipng /home/juser/wineshow/static/img/flkr/final/$FINAL
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