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Update notes for 2017-03-03

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Alan Orth
2017-03-04 01:15:47 +02:00
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@ -11,6 +11,12 @@ tags = ["Notes"]
## 2017-03-02
- Skype with Michael and Peter, discussing moving the CGIAR Library to CGSpace
- CGIAR people possibly open to moving content, redirecting library.cgiar.org to CGSpace and letting CGSpace resolve their handles
- They might come in at the top level in one "CGIAR System" community, or with several communities
- I need to spend a bit of time looking at the multiple handle support in DSpace and see if new content can be minted in both handles, or just one?
- Need to send Peter and Michael some notes about this in a few days
- Also, need to consider talking to Atmire about hiring them to bring ORCiD metadata to REST / OAI
- Filed an issue on DSpace issue tracker for the `filter-media` bug that causes it to process JPGs even when limiting to the PDF thumbnail plugin: [DS-3516](https://jira.duraspace.org/browse/DS-3516)
- Discovered that the ImageMagic `filter-media` plugin creates JPG thumbnails with the CMYK colorspace when the source PDF is using CMYK
- Interestingly, it seems DSpace 4.x's thumbnails were sRGB, but forcing regeneration using DSpace 5.x's ImageMagick plugin creates CMYK JPGs if the source PDF was CMYK (see [10568/51999](https://cgspace.cgiar.org/handle/10568/51999)):
@ -36,11 +42,14 @@ $ identify ~/Desktop/alc_contrastes_desafios.jpg
- Looks like `-colorspace sRGB` alone isn't enough, we need to use profiles:
```
$ convert -thumbnail 300x300 -flatten -profile /opt/brew/Cellar/ghostscript/9.20/share/ghostscript/9.20/iccprofiles/default_cmyk.icc -profile /opt/brew/Cellar/ghostscript/9.20/share/ghostscript/9.20/iccprofiles/default_rgb.icc alc_contrastes_desafios.pdf\[0\] alc_contrastes_desafios.pdf.jpg
$ convert alc_contrastes_desafios.pdf\[0\] -profile /opt/brew/Cellar/ghostscript/9.20/share/ghostscript/9.20/iccprofiles/default_cmyk.icc -thumbnail 300x300 -flatten -profile /opt/brew/Cellar/ghostscript/9.20/share/ghostscript/9.20/iccprofiles/default_rgb.icc alc_contrastes_desafios.pdf.jpg
```
- This reads the input file, applies the CMYK profile, applies the RGB profile, then writes the file
- Note that you should set the first profile immediately after the input file
- Also, it is better to use profiles than setting `-colorspace`
- This is a great resource describing the color stuff: http://www.imagemagick.org/Usage/formats/#profiles
- Somehow we need to detect the color system being used by the input file and handle each case differently
- Somehow we need to detect the color system being used by the input file and handle each case differently (with profiles)
- This is trivial with `identify` (even by the [Java ImageMagick API](http://im4java.sourceforge.net/api/org/im4java/core/IMOps.html#identify)):
```