在PHP中使用ImageMagick将PDF转换为JPG会产生奇数字母间距 [英] Converting a PDF to JPG with ImageMagick in PHP Gives Odd Letter Spacing

问题描述

我正在尝试通过PHP exec()调用将PDF转换为JPG，如下所示:

I am trying to convert a PDF to a JPG with a PHP exec() call, which looks like this:

convert page.pdf -resize 716x716 page.jpg

由于某些原因，尽管PDF在Acrobat和Mac Preview中看起来还不错，但JPG还是带有乱七八糟的文字.这是原始的PDF:

For some reason, the JPG comes out with janky text, despite the PDF looking just fine in Acrobat and Mac Preview. Here is the original PDF:

http://whit.info/dev/conversion/page.pdf

这是janktastic输出:

and here is the janktastic output:

http://whit.info/dev/conversion/page.jpg

服务器是具有PHP 5和ImageMagick 6.2.8的LAMP堆栈.

The server is a LAMP stack with PHP 5 and ImageMagick 6.2.8.

您能帮这个陷入困境的怪胎吗?

Can you help this stumped Geek?

预先感谢

W

推荐答案

ImageMagick只是调用Ghostscript将该PDF转换为图像.如果您在pdf上运行gs，则会得到相同的间距差的输出.

ImageMagick is just going to call out to Ghostscript to convert this PDF to an image. If you run gs on the pdf, you get the same badly-spaced output.

我怀疑Ghostscript不能很好地处理PDF的嵌入式TrueType字体.如果您可以将输出更改为嵌入Type 1字体或使用核心" PostScript字体，则将获得更好的结果.

I suspect Ghostscript isn't handling the PDF's embedded TrueType fonts very well. If you could change your output to either embed Type 1 fonts or use a "core" PostScript font, you'd get better results.

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