FM / ImageMagick-6

/etc/ImageMagick-6

Name	Size	Mode	Actions
coder.xml	899	0644	edit dl rm
colors.xml	1383	0644	edit dl rm
delegates.xml	14846	0644	edit dl rm
log.xml	1642	0644	edit dl rm
magic.xml	888	0644	edit dl rm
mime.xml	135431	0644	edit dl rm
policy.xml	8381	0644	edit dl rm
quantization-table.xml	2369	0644	edit dl rm
thresholds.xml	11452	0644	edit dl rm
type-apple.xml	29218	0644	edit dl rm
type-dejavu.xml	8490	0644	edit dl rm
type-ghostscript.xml	9544	0644	edit dl rm
type-urw-base35-type1.xml	9833	0644	edit dl rm
type-urw-base35.xml	7978	0644	edit dl rm
type-windows.xml	13706	0644	edit dl rm
type.xml	696	0644	edit dl rm

Edit: /etc/ImageMagick-6/quantization-table.xml (2369B)

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE quantization-tables [
  <!ELEMENT quantization-tables (table)>
  <!ATTLIST quantization-tables xmlns CDATA #FIXED "">
  <!ELEMENT table (description , levels)>
  <!ATTLIST table xmlns CDATA #FIXED "">
  <!ATTLIST table alias NMTOKEN #REQUIRED>
  <!ATTLIST table slot CDATA #REQUIRED>
  <!ELEMENT description (#PCDATA)>
  <!ATTLIST description xmlns CDATA #FIXED "">
  <!ELEMENT levels (#PCDATA)>
  <!ATTLIST levels xmlns CDATA #FIXED "">
  <!ATTLIST levels divisor CDATA #REQUIRED>
  <!ATTLIST levels height CDATA #REQUIRED>
  <!ATTLIST levels width CDATA #REQUIRED>
]>
<!--
  JPEG quantization table created by Dr. Nicolas Robidoux, Senior Research
  Scientist at Phase One (www.phaseone.com) for use with 2x2 Chroma
  subsampling and (IJG-style, hence ImageMagick-style) quality level
  around 75.

It is based on the one recommended in

Relevance of human vision to JPEG-DCT compression by Stanley A. Klein,
    Amnon D. Silverstein and Thom Carney. In Human Vision, Visual
    Processing and Digital Display III, 1992.

for 1 minute per pixel viewing.

Specifying only one table in this xml file has two effects when used with
  the ImageMagick option
  
    -define jpeg:q-table=PATH/TO/THIS/FILE
  
  1) This quantization table is automatically used for all three channels;

2) Only one copy is embedded in the JPG file, which saves a few bits
     (only worthwhile for very small thumbnails).
-->
<quantization-tables>
  <table slot="0" alias="luma">
    <description>Luma Quantization Table</description>
    <levels width="8" height="8" divisor="1">
      16,  16,  16,  18,  25,  37,  56,  85,
      16,  17,  20,  27,  34,  40,  53,  75,
      16,  20,  24,  31,  43,  62,  91,  135,
      18,  27,  31,  40,  53,  74,  106, 156,
      25,  34,  43,  53,  69,  94,  131, 189,
      37,  40,  62,  74,  94,  124, 169, 238,
      56,  53,  91,  106, 131, 169, 226, 311,
      85,  75,  135, 156, 189, 238, 311, 418
    </levels>
  </table>
  <!--
    If you want to use a different quantization table for Chroma, for example,
    just add:

<table slot="1" alias="chroma">
      <description>Chroma Quantization Table</description>
      INSERT 64 POSITIVE INTEGERS HERE, COMMA-SEPARATED
      </levels>
    </table>

here (but outside of these comments).
  -->
</quantization-tables>

Luma Quantization Table 16, 16, 16, 18, 25, 37, 56, 85, 16, 17, 20, 27, 34, 40, 53, 75, 16, 20, 24, 31, 43, 62, 91, 135, 18, 27, 31, 40, 53, 74, 106, 156, 25, 34, 43, 53, 69, 94, 131, 189, 37, 40, 62, 74, 94, 124, 169, 238, 56, 53, 91, 106, 131, 169, 226, 311, 85, 75, 135, 156, 189, 238, 311, 418