diff --git a/content/posts/2021-08.md b/content/posts/2021-08.md index 66d182097..4f20eeef4 100644 --- a/content/posts/2021-08.md +++ b/content/posts/2021-08.md @@ -210,5 +210,20 @@ if(cells['sherpa romeo journal title'].value == cells['crossref journal title']. - It is faster and uses less memory than GraphicsMagick (and ImageMagick), and produces nice thumbnails from PDFs - One drawback is that libvips uses Poppler instead of Graphicsmagick, which apparently means that it can't work in CMYK - I tested one item (10568/51999) that uses CMYK and the thumbnail looked OK (closer to the original than GraphicsMagick), so I'm not sure... +- I did some tests of the memory used and time elapsed with libvips, GraphicsMagick, and ImageMagick: + +```console +$ /usr/bin/time -f %M:%e vipsthumbnail IPCC.pdf -s 600 -o '%s-vips.jpg[Q=85,optimize_coding,strip]' +39004:0.08 +$ /usr/bin/time -f %M:%e gm convert IPCC.pdf\[0\] -quality 85 -thumbnail x600 -flatten IPCC-gm.jpg +40932:0.53 +$ /usr/bin/time -f %M:%e convert IPCC.pdf\[0\] -flatten -profile /usr/share/ghostscript/9.54.0/iccprofiles/default_cmyk.icc -profile /usr/share/ghostscript/9.54.0/iccprofiles/default_rgb.icc /tmp/impdfthumb2862933674765647409.pdf.jpg +41724:0.59 +$ /usr/bin/time -f %M:%e convert -auto-orient /tmp/impdfthumb2862933674765647409.pdf.jpg -quality 85 -thumbnail 600x600 IPCC-im.jpg +24736:0.04 +``` + +- The ImageMagick way is the same as how DSpace does it (first creating an intermediary image, then getting a thumbnail) + - libvips does use less time and memory... I should do more tests! diff --git a/docs/2021-08/index.html b/docs/2021-08/index.html index b5782c2f9..25bb33b0e 100644 --- a/docs/2021-08/index.html +++ b/docs/2021-08/index.html @@ -18,7 +18,7 @@ I decided to upgrade linode20 from Ubuntu 18.04 to 20.04 - + @@ -42,9 +42,9 @@ I decided to upgrade linode20 from Ubuntu 18.04 to 20.04 "@type": "BlogPosting", "headline": "August, 2021", "url": "https://alanorth.github.io/cgspace-notes/2021-08/", - "wordCount": "1537", + "wordCount": "1636", "datePublished": "2021-08-01T09:01:07+03:00", - "dateModified": "2021-08-09T08:38:44+03:00", + "dateModified": "2021-08-09T17:10:45+03:00", "author": { "@type": "Person", "name": "Alan Orth" @@ -329,6 +329,22 @@ $ csvjoin -c issn /tmp/2021-08-09-journals-sherpa-romeo.csv /tmp/2021-08-09-jour
  • I tested one item (10568/51999) that uses CMYK and the thumbnail looked OK (closer to the original than GraphicsMagick), so I’m not sure…
    • +
  • I did some tests of the memory used and time elapsed with libvips, GraphicsMagick, and ImageMagick:
    • + +
    $ /usr/bin/time -f %M:%e vipsthumbnail IPCC.pdf -s 600 -o '%s-vips.jpg[Q=85,optimize_coding,strip]'
+39004:0.08
+$ /usr/bin/time -f %M:%e gm convert IPCC.pdf\[0\] -quality 85 -thumbnail x600 -flatten IPCC-gm.jpg 
+40932:0.53
+$ /usr/bin/time -f %M:%e convert IPCC.pdf\[0\] -flatten -profile /usr/share/ghostscript/9.54.0/iccprofiles/default_cmyk.icc -profile /usr/share/ghostscript/9.54.0/iccprofiles/default_rgb.icc /tmp/impdfthumb2862933674765647409.pdf.jpg
+41724:0.59
+$ /usr/bin/time -f %M:%e convert -auto-orient /tmp/impdfthumb2862933674765647409.pdf.jpg -quality 85 -thumbnail 600x600 IPCC-im.jpg
+24736:0.04
+
    diff --git a/docs/categories/index.html b/docs/categories/index.html index 398c442a5..7d857cb46 100644 --- a/docs/categories/index.html +++ b/docs/categories/index.html @@ -10,7 +10,7 @@ - + diff --git a/docs/categories/notes/index.html b/docs/categories/notes/index.html index fae4a3ecc..2537e50f1 100644 --- a/docs/categories/notes/index.html +++ b/docs/categories/notes/index.html @@ -10,7 +10,7 @@ - + diff --git a/docs/categories/notes/page/2/index.html b/docs/categories/notes/page/2/index.html index 6de22e301..3d39227c2 100644 --- a/docs/categories/notes/page/2/index.html +++ b/docs/categories/notes/page/2/index.html @@ -10,7 +10,7 @@ - + diff --git a/docs/categories/notes/page/3/index.html b/docs/categories/notes/page/3/index.html index 08ee12512..3035845fc 100644 --- a/docs/categories/notes/page/3/index.html +++ b/docs/categories/notes/page/3/index.html @@ -10,7 +10,7 @@ - + diff --git a/docs/categories/notes/page/4/index.html b/docs/categories/notes/page/4/index.html index 571c184c5..59a08e50d 100644 --- a/docs/categories/notes/page/4/index.html +++ b/docs/categories/notes/page/4/index.html @@ -10,7 +10,7 @@ - + diff --git a/docs/categories/notes/page/5/index.html b/docs/categories/notes/page/5/index.html index 2e0fe515d..1b797cf8c 100644 --- a/docs/categories/notes/page/5/index.html +++ b/docs/categories/notes/page/5/index.html @@ -10,7 +10,7 @@ - + diff --git a/docs/index.html b/docs/index.html index 916d47477..325293be1 100644 --- a/docs/index.html +++ b/docs/index.html @@ -10,7 +10,7 @@ - + diff --git a/docs/page/2/index.html b/docs/page/2/index.html index 8adf735f8..cab94a1c1 100644 --- a/docs/page/2/index.html +++ b/docs/page/2/index.html @@ -10,7 +10,7 @@ - + diff --git a/docs/page/3/index.html b/docs/page/3/index.html index 38eca8d69..1e6811f4c 100644 --- a/docs/page/3/index.html +++ b/docs/page/3/index.html @@ -10,7 +10,7 @@ - + diff --git a/docs/page/4/index.html b/docs/page/4/index.html index ffad9f8db..fe6506033 100644 --- a/docs/page/4/index.html +++ b/docs/page/4/index.html @@ -10,7 +10,7 @@ - + diff --git a/docs/page/5/index.html b/docs/page/5/index.html index 03e3c4237..8efa78ded 100644 --- a/docs/page/5/index.html +++ b/docs/page/5/index.html @@ -10,7 +10,7 @@ - + diff --git a/docs/page/6/index.html b/docs/page/6/index.html index 62df12e4d..02dde15b5 100644 --- a/docs/page/6/index.html +++ b/docs/page/6/index.html @@ -10,7 +10,7 @@ - + diff --git a/docs/page/7/index.html b/docs/page/7/index.html index 00f140bda..adc9a7bee 100644 --- a/docs/page/7/index.html +++ b/docs/page/7/index.html @@ -10,7 +10,7 @@ - + diff --git a/docs/page/8/index.html b/docs/page/8/index.html index 62d113060..67680ecf0 100644 --- a/docs/page/8/index.html +++ b/docs/page/8/index.html @@ -10,7 +10,7 @@ - + diff --git a/docs/posts/index.html b/docs/posts/index.html index e5fa61442..b819cdac9 100644 --- a/docs/posts/index.html +++ b/docs/posts/index.html @@ -10,7 +10,7 @@ - + diff --git a/docs/posts/page/2/index.html b/docs/posts/page/2/index.html index 7e9ae9075..65477cbfc 100644 --- a/docs/posts/page/2/index.html +++ b/docs/posts/page/2/index.html @@ -10,7 +10,7 @@ - + diff --git a/docs/posts/page/3/index.html b/docs/posts/page/3/index.html index 709953cee..6e1255562 100644 --- a/docs/posts/page/3/index.html +++ b/docs/posts/page/3/index.html @@ -10,7 +10,7 @@ - + diff --git a/docs/posts/page/4/index.html b/docs/posts/page/4/index.html index 7cc40a595..08798ee40 100644 --- a/docs/posts/page/4/index.html +++ b/docs/posts/page/4/index.html @@ -10,7 +10,7 @@ - + diff --git a/docs/posts/page/5/index.html b/docs/posts/page/5/index.html index 8c4627b73..3117c601e 100644 --- a/docs/posts/page/5/index.html +++ b/docs/posts/page/5/index.html @@ -10,7 +10,7 @@ - + diff --git a/docs/posts/page/6/index.html b/docs/posts/page/6/index.html index 0f0b0c11a..d20f7ddba 100644 --- a/docs/posts/page/6/index.html +++ b/docs/posts/page/6/index.html @@ -10,7 +10,7 @@ - + diff --git a/docs/posts/page/7/index.html b/docs/posts/page/7/index.html index 8f358876c..dac59ff60 100644 --- a/docs/posts/page/7/index.html +++ b/docs/posts/page/7/index.html @@ -10,7 +10,7 @@ - + diff --git a/docs/posts/page/8/index.html b/docs/posts/page/8/index.html index 7d0c04932..fbc3c1258 100644 --- a/docs/posts/page/8/index.html +++ b/docs/posts/page/8/index.html @@ -10,7 +10,7 @@ - + diff --git a/docs/sitemap.xml b/docs/sitemap.xml index d032d4d6f..3d262bd81 100644 --- a/docs/sitemap.xml +++ b/docs/sitemap.xml @@ -3,19 +3,19 @@ xmlns:xhtml="http://www.w3.org/1999/xhtml"> https://alanorth.github.io/cgspace-notes/2021-08/ - 2021-08-09T08:38:44+03:00 + 2021-08-09T17:10:45+03:00 https://alanorth.github.io/cgspace-notes/categories/ - 2021-08-09T08:38:44+03:00 + 2021-08-09T17:10:45+03:00 https://alanorth.github.io/cgspace-notes/ - 2021-08-09T08:38:44+03:00 + 2021-08-09T17:10:45+03:00 https://alanorth.github.io/cgspace-notes/categories/notes/ - 2021-08-09T08:38:44+03:00 + 2021-08-09T17:10:45+03:00 https://alanorth.github.io/cgspace-notes/posts/ - 2021-08-09T08:38:44+03:00 + 2021-08-09T17:10:45+03:00 https://alanorth.github.io/cgspace-notes/2021-07/ 2021-08-01T16:19:05+03:00