Legacy ImageMagick Discussions Archive

Able to see change in dpi using irfan viewer.

Hi All,

I am able to see the change in dpi using irfan view. Appreciate your effort to help me out.

Thanks,
Deepak

Hi, That is over 150 versions old. You should upgrade. See http://www.imagemagick.org/script/binary-releases.php#windows or http://www.imagemagick.org/script/install-source.php#windows In order to use new version of ImageMagick library I have done following thing. 1. Downloaded http://www.imagemagic...

Deepak[/quote] I couldn't see in your code anything having to do with density. I assume you created a new text chunk with the density info, with the proper chunk length and recalculated CRC, and then used your code to assemble a PNG file from the chunks, including your new or revised text chunk. Cor...

Hi,

We are using imagemagick-win64-vc110-6.7.6.rtt_patch.3 library, could u please let me know is there any hotfix availble?


Thanks,
Deepak

Hi,

Any one can look into this??

Thanks,
Deepak

PNG stores "resolution" in pixels/meter. But I've seen density go into a PNG text chunk with "Density" keyword, and embedded in the EXIF data. The "density()" api may be putting the density info in the wrong place (BTW I can't find a "density()" API anywhere ...

Hi, I have used density(dpi) api to change the dpi of png image. dpi is not getting changed for PNG image but it works fine for JPEG image. Please let us know whether anything I need to before or after calling density(dpi). Reference : http://www.imagemagick.org/discourse-server/viewtopic.php?f=23&a...

HI,

fmw42 wrote:One of the IM developers will need to check this out further.

Thank you for the reply. Will wait for the developer reply as I am not getting information from any source to solve this issue.

Thanks,
Deepak

try specifying the units as well. See if that makes any difference. Hi, We tried giving units. ----------------------------------------------------------------------------------------------------------- if(dpi.length() != 0){ const Magick::Geometry gm("150 cm,391 cm"); // Specified in cms...

Hi, We tried giving units. ----------------------------------------------------------------------------------------------------------- if(dpi.length() != 0){ const Magick::Geometry gm("150 cm,391 cm"); // Specified in cms image.density(gm); } -----------------------------------------------...

>Did you specify the units as well? IM will automatically convert dpi to dpc if proper units are specified, since png only uses dots per centimeter.[/quote] Hi, We are not specifying any units. We are just giving (150,150) and DPI is not getting changed. output dpi is same as input dpi. if(dpi.lengt...

Hi All,

could anyone help on this?


Thanks,
Deepak

Hi,
My imagemagick version is -6.8.9-Q16 and OS is Windows 7 64.

Thanks,
Deepak

Hi,

I have used density(dpi) api to change the dpi of png image. dpi is not getting changed for PNG image but it works fine for JPEG image.
Please let us know whether anything I need to before or after calling density(dpi).


Thanks,
Deepak