Color changes when converting PDF to JPG using PHP

[kjbasiljohn]

When I am converting PDF to JPG using PHP and Command, the color is changing.
Following command are using

convert -limit memory 0 -limit map 0 -quiet -define pdf:use-cropbox=true -interlace none -density 300x300 +repage "source" "destination"

Original PDF http://basiljohn.com/test/0315+EA+Autumn+4.pdf
Image http://basiljohn.com/test/7664-max.jpg
Image http://basiljohn.com/test/7666-max.jpg

Any help please?

[kjbasiljohn]

ImageMagick version using v6.8.4-10

[fmw42]

There were changes to IM around 6.8.x that may be affecting your processing. You might upgrade to the current version.

My system will not let me go to the place you have uploaded your images, saying "High Risk Website Blocked". Perhaps you should upload your images to dropbox.com.

[kjbasiljohn]

Thank you for the quick reply

following are the link
PDF : https://www.dropbox.com/s/h3gfun37rgm1b ... 4.pdf?dl=0
Image : https://www.dropbox.com/s/judrpulzsu3rv ... x.jpg?dl=0
https://www.dropbox.com/s/s5jniqnjndvyk ... x.jpg?dl=0

[246246]

Your input pdf is CMYK. Output is RGB.
Current release of ImageMagick (6.9.1-9) does not change colorspace with your command, i.e. CMYK jpg is generated. So if you want CMYK jpg, upgrade is recommended.

[fmw42]

Your input PDF is CMYK, you probably need to convert it to sRGB with profiles when saving to JPG.

Try this (unix syntax) for the first page. It works for me on IM 6.9.1.9 Q16 Mac OSX

Code: Select all

convert 0315+EA+Autumn+4.pdf[0] \
-profile /Users/fred/images/profiles/USWebCoatedSWOP.icc \
-profile /Users/fred/images/profiles/sRGB.icc \
test_srgb.jpg

use your own path to these profiles.

Please always identify your version of IM and platform. Your version of IM may be too old or buggy to do the convert to CMYK JPG. So you may need an upgrade.

On my Mac OSX with IM 6.9.1.9, a direct conversion looks color inverted when displayed as per the following command line. This is often an issue with CMYK JPG

Code: Select all

convert 0315+EA+Autumn+4.pdf[0] 0315+EA+Autumn+4_0.jpg

So I would stick with the profile conversion to sRGB as the safest measure. Some viewers do not handle CMYK JPEG very well.

[fmw42]

This may also work, but the profile method gives more accurate colors.

Code: Select all

convert -colorspace sRGB 0315+EA+Autumn+4.pdf[0] test_srgb2.jpg

[kjbasiljohn]

Thank you so much, its much better now. I have used following command.

convert -limit memory 0 -limit map 0 -quiet -define pdf:use-cropbox=true -interlace none -background white -alpha remove -density 300x300 +repage -colorspace sRGB " SOURCE -quality 95 jpg:" DESTINATION;

can you please tell me from where i can download, sRGB.icc

Thank You

[snibgo]

Look in the directory that contains your convert program.

[fmw42]

Look in the directory that contains your convert program.

I do not think they are there by default. I think they must be installed. At least that is how it is on my Mac. Neither the IM download folder nor my folder that contains the installed convert program have profiles located there.

I installed them from:

Get them from profiles.zip at http://www.imagemagick.org/download/delegates/
or
http://www.mattbeals.com/icc/

or for just sRGB.icc, you can get it at http://www.color.org/srgbprofiles.xalter

[snibgo]

Thanks for the correction. sRGB.icc is provided with the IM installation on Windows, but may not be with other installations.

[fmw42]

Thanks for the correction. sRGB.icc is provided with the IM installation on Windows, but may not be with other installations.

Perhaps that is the case with all binaries, but not when installing from source?

[kjbasiljohn]

Thank you so much guys for all the help. I didn't try with profiles yet. I will let you know once after I have used that.