convert -interlace Plane a.png a.png
===== 图片转pdf =====
convert *.jpg result.pdf
可能存在的错误信息:
1. attempt to perform an operation not allowed by the security policy `PDF'
解决办法:
sudo vim /etc/ImageMagick-6/policy.xml
# 将 改为
2. cache resources exhausted
解决办法:
sudo vim /etc/ImageMagick-6/policy.xml
# 将 改为