Legacy ImageMagick Discussions Archive

I want to convert a PDF to high resolution JPG. The command line I finally got working with:

convert -density 300 -colorspace RGB cover.pdf -profile USWebCoatedSWOP.icc cover.jpg

However, when I try to do that with magickwand, the MagickSetResolution forces a GRAY colorspace before even reading the image and I can't seem to set it back, and everything is horked. *without* setting the resolution, everything is fine.

Here is the code I am running:

Code: Select all

        if( $isPdf ) {
            MagickSetImageUnits( $magickWand, MW_PixelsPerInchResolution );
            MagickSetResolution( $magickWand, 300, 300 );
        }
        MagickReadImage( $magickWand, $sourceFile );
        if( MagickGetImageColorspace( $magickWand ) == MW_CMYKColorspace ) {
                MagickRemoveImageProfile( $magickWand, "ICC" );
                MagickSetImageProfile( $magickWand, 'ICC', file_get_contents( 'USWebCoatedSWOP.icc' ) );
                MagickProfileImage($magickWand, 'ICC', file_get_contents( 'srgb.icm' ) );
                MagickSetImageColorspace( $magickWand, MW_RGBColorspace );
        }

Which works as long as I don't call MagickSetResolution.

Any thoughts?

Thanks.

Post a complete working example and a URL to one of your PDF images. We need to reproduce the problem before we can offer a solution.

Here is a complete working test, including test file. You can access it from a URL or from the command line. The line to uncomment has a note above it in the source. That simple change creates the right size file, but the colorspace turns to gray *prior* to the read file. Where as not setting the resolution, there is not colorspace data set. I have tried setting the colorspace and profile and anything else I can figure.

Thanks so much for taking a look.

Which version of ImageMagick are you using? We tried your script with the latest release and it worked fine. It returned a 5292x2625 RGB JPEG image as expected.

I have tried with:
* PHP 5.0.4, IM 6.2.2 with MagickWand 0.1.3 (Fedora 4), x86_64
* PHP 5.1.4, IM 6.2.9 with MagickWand 0.1.8 (Centos 4.4), x86_64
I could understand 6.2.2/013 being iffy, but I would think 6.2.9 and 0.1.8 should be recent enough.

You uncommented the line with MagickSetResolution? Did you look at the resultant jpg and it looked identical to the PDF?

Yes and yes.

What PHP, IM, MagickWand versions are you running?

I just upgraded to IM 6.3.2 and MagickWand 0.1.9 and am still seeing the same. This is a 99% stock Centos box, with only the PHP and ImageMagick updated. I used the fedora RPM's from ftp://ftp.imagemagick.net/pub/ImageMagi ... -2.src.rpm and had to change freetype2-devel to freetype-devel in the pre-req's. That's it. Anything dangerous in that?

Its possible the problem is with Ghostscript which ImageMagick uses to render PDF images. We're using Ghostscript 8.54.

Ugh, this is the likely beast. I just tried it on a Fedora Core 6 machine with 8.15 and got the same result. Any chance you have GS 8.15 floating around somewhere since that is the most recent build for Fedora, Suse, and likely RHEL5? I have tried upgrading ghostscript before, but the experience produced problematic output.

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