使用pngquant命令近乎无损压缩PNG图片大小减少70%左右
1.安装
wget http://pngquant.org/pngquant-2.8.2-src.tar.gz
tar -xzf pngquant-2.8.2-src.tar.gz
cd pngquant-2.8.2
安装依赖:yum install libpng-devel
./configure
make && make install
ok ,安装完成。
pngquant -h 看是否正常,如果报:pngquant: error while loading shared libraries: liblcms2.so.2: cannot open shared object file: No such file or directory
重新装一下liblcms2 , yum install http://pkgrepo.linuxtech.net/el6/release/x86_64/liblcms2-2.4-1.el6.x86_64.rpm 解决
Options
See pngquant -h
for full list of options.
--ext new.png
-
Set custom extension for output filename. By default
-or8.png
or-fs8.png
is used. --quality min-max
-
Instructs
min and max are numbers in range 0 (worst) to 100 (perfect), similar to JPEG.pngquant
to use the least amount of colors required to meet or exceed the max quality. If conversion results in quality below the min quality the image won't be saved (if outputting to stdout, 24-bit original will be output) andpngquant
will exit with status code 99.pngquant --quality=65-80 image.png
--speed N
,-sN
-
Speed/quality trade-off from 1 (brute-force) to 10 (fastest). The default is 3. Speed 10 has 5% lower quality, but is 8 times faster than the default.
--iebug
-
Workaround for IE6, which only displays fully opaque pixels.
pngquant
will make almost-opaque pixels fully opaque and will avoid creating new transparent colors. --version
-
Print version information to stdout.
-
-
Read image from stdin and send result to stdout.
--
-
Stops processing of arguments. This allows use of file names that start with
-
. If you're usingpngquant
in a script, it's advisable to put this before file names:pngquant $OPTIONS -- "$FILE"
posted on 2017-01-05 17:18 cn三少<script></script> 阅读(4767) 评论(0) 编辑 收藏 举报