dqayok7935
dqayok7935
2017-06-23 15:02

在php中使用imageMagick进行Pdf预览

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I am looking for the simplest way of generating image preview from the first page of a pdf file. I have found a nice tutorial, however the code is not complete there. What is the missing part?

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  • drbi19093 drbi19093 4年前

    In ImageMagick from PHP exec()

    exec("convert -density XX image.pdf[0] -resize YY% preview.png")
    

    where XX is the desired density (nominal is 72) but I use something like 288=4*72) to get good quality and YY is the corresponding percent to reduce the image, such as 25%. The [0] means to process only the first page of the pdf.

    exec("convert -density 288 image.pdf[0] -resize 25% preview.png")
    

    Adjust these arguments to get the desired output size. You can change png to jpg, but you should then add -quality ZZ before the output to set the jpg compression quality. Values are 0 to 100, nominal for ImageMagick is to use 92.

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