Legacy ImageMagick Discussions Archive

tczf1128

Thank you so much

tczf1128

convert file.pdf -append  out.jpeg

https://test-1257746263.cos.ap-shanghai ... m/file.pdf

imagemagick version:7.0.8-23

tczf1128

Code: Select all

convert input.png \
        -gravity Center \
        \( -size 200x200 \
           xc:Black \
           -fill White \
           -draw 'circle 100 100 100 1' \
           -alpha Copy \
        \) -compose CopyOpacity -composite \
        -trim output.png

tczf1128

thanks

tczf1128

I have a jpeg with 50 quality, when I convert it to webp and set quality to 90, the result looks worse. its why?

Code: Select all

convert zjb_origin.jpeg -quality 90% xx.webp

it is the origin jpeg, http://smellycat.oss-cn-hangzhou.aliyun ... rigin.jpeg

tczf1128

Thanks so much

tczf1128

So how can I know a 16 depth png can convert a 8 bit depth png without distortion. I'm using the magickWand api

tczf1128

And another question.
16 bit depth png to be resized 60%, its depth still 16 bit?
I try this imagehttp://test-1257746263.picsh.myqcloud.c ... Snap20.png and the result is 16 depth

tczf1128

try this png http://test-1257746263.picsh.myqcloud.com/7a063c32e5c29a16fda4c02842e7c984.png convert 7a063c32e5c29a16fda4c02842e7c984.png -resize 80% tmp.png -rw-r--r-- 1 tczf staff 45K 12 3 22:44 7a063c32e5c29a16fda4c02842e7c984.png -rw-r--r--@ 1 tczf staff 211K 12 3 19:31 58a40d9d85367.png

tczf1128

It works when I upgrade imagemagick from 7.0.8-12 to 7.0.8-14, but the size of resized image is bigger than the original one.

tczf1128

It result in a bigger size png when resize. and version in centos7.2 Version: ImageMagick 7.0.8-12 Q16 x86_64 $ uname -a Linux 3.10.0-862.2.3.el7.x86_64 #1 SMP Wed May 9 18:05:47 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux $ identify -verbose tmp.png Image: tmp.png Format: PNG (Portable Network Graphic...

tczf1128

I try your command both in macos and centos7.2, both reuslt png is 16 bit depth $ uname -a Darwin MBA.local 18.2.0 Darwin Kernel Version 18.2.0: Fri Oct 5 19:41:49 PDT 2018; root:xnu-4903.221.2~2/RELEASE_X86_64 x86_64 $ convert -version Version: ImageMagick 7.0.8-12 Q16 x86_64 2018-10-15 https://ima...

tczf1128

I have a png image which is 8 bit depth, when I scale it to 80%, the bit depth become 16.

convert -resize 80% 58a40d9d85367.png 58a40d9d85367.im.png

Legacy ImageMagick Discussions Archive

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