Legacy ImageMagick Discussions Archive

on ubuntu 16 with libpng 1.2 everything works fine. a thing to think...

So you think that metadata causes the size? But what does compression parameter mean, that was in output i provided?

sorry, updated

ok, if this can clarify something.
src: https://www.dropbox.com/s/xv9h2tmstvl101n/test.jpg?dl=0
win ver: https://www.dropbox.com/s/v27je71blyikn ... n.png?dl=0
cent ver: https://www.dropbox.com/s/v4gaapbhb90y3 ... t.png?dl=0
hope this will help

if you have some suggestions about what could it be i'll be much appreciated for explanation

so the output that i've posted is not an output for you?)

yes i tried "convert file.jpg file.png" and result was the same.
as i understand png expert has dissappeared)

and here is zoomed fragment of Alpha Channel Extraction of Imagick object where there is no alpha at all $alphaChannel->setImageAlphaChannel(Imagick::ALPHACHANNEL_EXTRACT); result: https://image.ibb.co/gkmkBk/Screenshot_1.jpg artifacts. and again on Win everything works fine. sad situation. it wolud ...

my version of libpng is 2015 (1.5.3) year released, it is not the latest, but i dont think it is so outdated that cant compress png image normally.

script: $int_im = new Imagick($base_file_path); $int_im->scaleImage(1000,1000,true); $int_im->setImageFormat('png'); $int_im->writeImage($int_file_path); (by the way, this conversion i made on another win machine with not the latest IM and as for Linux i also tried to do conversion on another CentOs ...

At first it was 3.4.3RC4 and then i tried 3.4.3 with the same results. It is what shows phpinfo(), but in convert -version output is CentOs - Version: ImageMagick 6.7.8-9 2016-06-16 Q16 Windows - Version: ImageMagick 6.9.3-7 Q16 x64 2016-03-27 libpng on CentOs - (libpng 1.5.13) on Windows - (libpng ...

Two systems: Win10 and CentOs7, same php code, the resulting image is png file. On windows compression works even if i dont specify Image Compression option and the result file size is 400 kb, on CentOs even with Compression params image is not compressed and it's size is about 1,2 mb. How could it ...