Re: strange behavior of -density
jinsong zhao <[email protected]>
| Newsgroups | gmane.comp.video.image-magick.user |
|---|---|
| Message-ID | <[email protected]> |
I am so sorry.... I just found the reason was the unit of resolution in tiff and png was different... Regards, Jinsong On Sun, Oct 18, 2009 at 5:31 PM, jinsong zhao <[email protected]> wrote: > Hi there, > > I use `convert' to convert some figure in tiff format (in 300dpi) to png > with lower resolution: > > convert -density 30 -resize 10% input.tiff output.1.png > > and I get the output.1.png with resolution 29 dpi. it seems right. > > However, if I convert the original tiff to png with the same resolution, > and then convert the png to lower resolution png or tiff, I get different > resolution. > > convert input.tiff output.2.png > convert -density 30 -resize 10% output.2.png output.3.png > > and I get the output.3.png with resolution 76 dpi. > <snip>