Legacy ImageMagick Discussions Archive

Hi,

I was wondering if there is an option to make imagemagick choose automatically the density when converting a PDF file to a raster format?

For example, if I do this :, the file will be imported with a density of 72 and then eventually resized, which causes an ugly rendering.

Is there a way to adjust the density so that the PDF image is rendered correctly at its desired size? Or should I get the PDF size at 72dpi, then calculate the appropriate density, and then reconvert the image?

Thanks!

IM will not automatically compute an optimal density, to my knowledge. I am not sure that PDF even has a density. The png gets assigned a density of 72 if you don't specify anything for the PDF.

See

http://www.imagemagick.org/Usage/basics/#cmdline

for correct syntax with IM v6

convert -density ... image.pdf -resize ... image.png

also see http://www.imagemagick.org/Usage/formats/#pdf

Okay, I will also try to calculate the correct dpi from the PDF size.

I already tested the given examples and the problem is still here.

Thank you