PDF To JPG
I had a need to extract the pages of a PDF as JPG images. I have a Linux VM setup already with tesseract as an OCR server, so I decided to add this ability to it. The first choice was to install ImageMagick and use it’s convert utility.
After using yum install ImageMagick, when I tried to convert with ICC files like below;
convert -verbose -density 300 -colorspace rgb SaleCat.pdf[10-20] -profile eciCMYK.icc -profile eciRGB_v2.icc -quality 100 y-%04d.jpg
I got this message:
convert: delegate library support not built-in `SaleCat.pdf' (LCMS) @ warning/profile.c/ProfileImage/565.
I ran the following to see the delegates installed:
convert -list configure | grep -i "delegates"
The results showed the lcms delegate wasn’t setup:
DELEGATES bzlib fontconfig freetype gs jpeg jng jp2 lzma openexr pango png rsvg tiff x11 xml wmf zlib
I verified that lcms was already installed with yum install lcms2 (it was).
So it appears that I needed to rebuild ImageMagick from source to include the lcms2 delegate. I removed Image magic with “yum remove ImageMagick” first.
I made sure gcc was installed:
yum install gcc
Then downloaded and configured the ImageMagick source:
tar xvfz ImageMagick.tar.gz
The config should show that lcms was now enabled, but it wasn’t:
LCMS --with-lcms=yes no
So I looked at config.log to see the details:
configure:31839: checking for lcms2 >= 2.0.0
configure:31846: $PKG_CONFIG --exists --print-errors "lcms2 >= 2.0.0"
Package lcms2 was not found in the pkg-config search path.
Perhaps you should add the directory containing `lcms2.pc'
to the PKG_CONFIG_PATH environment variable
No package 'lcms2' found
I made sure that lcms2 devel was installed:
yum install lcms2-devel
I tried again to build:
And this time the config looked good:
LCMS --with-lcms=yes yes
And so I built and installed ImageMagick from the source:
Now I can run convert from /usr/local/bin/convert and process with icc files.