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Subject: Re: DOCBOOK-APPS: image sizes




>Doug du Boulay <ddb@R3401.msl.titech.ac.jp> writes:
>
>> I am using dsssl with openjade and the docbook stylesheets to render html and 
>> with pdfjadetex to render pdf format.
>> 
>> I would like to know what is the best way to control image sizes in both 
>> output formats from the docbook markup. 
>> HTML seems to accept 
>> width="N" pixels
>> width="N%" percent
>> width="N*"  relative dimensions
>> 
>> These dont seem to be honoured by the tex output.
>> and specifying units of "Ncm" trashes the html output. 
>> 
>> what is the best strategy?
>

I store my original images as *.tiff files and then use ImageMagick to convert to (possibly lower resolution) png and jpg files for use in html and pdf outputs. For example:

High resolution file:
convert -quality 75 -density 300 srcimg/image.tif hrimg/image.jpg

Lower resolution file:
convert -geometry 48% -quality 50 -density 144 srcimg/image.tif lrimg/image.jpg

Since 144/.48 = 300, the image sizes are the same. Since the dimensions in pixels may differ from html to pdf, I leave the WIDTH and DEPTH attributes blank. You can choose any combination of density and geometry to get your files to be the proper size for html. I keep separate "versions" (lrimg, hrimg) of the graphics in separate directories and then just cp -R the appropriate directory to "images" before running openjade. My imagedata tags refer to all files as, for example:

<imagedata fileref="images/image.jpg" format="JPG"/>


--
Kevin M. Dunn
Professor of Chemistry
Hampden-Sydney College
--


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