Hi, I'm using PerlMagick version 6.2.8 on my server.
I'm grabbing non-copyright wind-speed analysis images with a colour depth of 16. An example original image is here at http://activitae.com/images/wind.gif I need to reduce the image in physical size and, hopefully, byte size too to display on smartphones or PDAs. When I grab an image and try to keep the colour depth the same I end up with an image with grubby brown colours whereas they were yellow, orange and red. Example http://activitae.com/images/wind1.gif I've read the archive's previous posts about the file size of gif images ending up larger than they started because of artifacts added during resizing. And this certainly happens with these reduced colour depth images, although I have had good results using perlMagick to resize other web images. But these end up being 12Kb larger than the original despite being reduced to 71%. The problem seems to be that Resize and Sharpen return the image to a 256 colour depth. And then a Quantize back to 16 seems to choose any colours in the image. My question is this is there a way to restrict the Resize and Sharpen functions to only use the original image's colour table so I end up with an image with correct colours and of smaller file size? And second question. If I handle an image request by passing back a web page with <img src="http://...."; height='483' width='483' > the browser then does the work of image reduction but appears to do it far better than PerlMagick does. Example is here http://activitae.com/NApda-2.htm . Is someone able to explain to me why? All help appreciated. Angela _______________________________________________ Magick-users mailing list [email protected] http://studio.imagemagick.org/mailman/listinfo/magick-users
