expkg-zone58:image.metadata

An XQuery library to extract image metadata as XML using the Drew Noakes library
The output XML format matches the o/p of the Xmlcalabash metadata extension.

import module namespace imgmeta = "expkg-zone58:image.metadata" ;

declare variable $pic1:=resolve-uri("simple.jpg"); 
imgmeta:read($pic1)
<metadata>
  <tag name="Compression Type" dir="JPEG" type="0xfffffffd">Baseline</tag>
  <tag name="Data Precision" dir="JPEG" type="0x0000">8 bits</tag>
  <tag name="Image Height" dir="JPEG" type="0x0001">600 pixels</tag>
  <tag name="Image Width" dir="JPEG" type="0x0003">800 pixels</tag>
  <tag name="Number of Components" dir="JPEG" type="0x0005">3</tag>
  <tag name="Component 1" dir="JPEG" type="0x0006">Y component: Quantization table 0, Sampling factors 2 horiz/2 vert</tag>
  <tag name="Component 2" dir="JPEG" type="0x0007">Cb component: Quantization table 1, Sampling factors 1 horiz/1 vert</tag>
  <tag name="Component 3" dir="JPEG" type="0x0008">Cr component: Quantization table 1, Sampling factors 1 horiz/1 vert</tag>
  <tag name="JPEG Comment" dir="JpegComment" type="0x0000">AppleMark
</tag>
  <tag name="Make" dir="Exif IFD0" type="0x010f">Canon</tag>
  <tag name="Model" dir="Exif IFD0" type="0x0110">Canon PowerShot S330</tag>
  <tag name="Orientation" dir="Exif IFD0" type="0x0112">Top, left side (Horizontal / normal)</tag>
  <tag name="X Resolution" dir="Exif IFD0" type="0x011a">180 dots per inch</tag>
  <tag name="Y Resolution" dir="Exif IFD0" type="0x011b">180 dots per inch</tag>
  <tag name="Resolution Unit" dir="Exif IFD0" type="0x0128">Inch</tag>
  <tag name="Software" dir="Exif IFD0" type="0x0131">QuickTime 6.0.2</tag>
  <tag name="Date/Time" dir="Exif IFD0" type="0x0132">2002-11-18T22:46:09</tag>
  <tag name="Host Computer" dir="Exif IFD0" type="0x013c">Mac OS X 10.2.2</tag>
..

Usage

import module namespace metadata = 'expkg-zone58:image.metadata';
metadata:read("C:\Users\andy\Desktop\russian.jpg")

Additionally functions are provided to process some common tags, such as GPS information.

XMP data

import module namespace imgmeta = "expkg-zone58:image.metadata" ;
declare variable $pic1:="C:\Users\andy\Desktop\IMG_3881.JPG"; 

$pic1=>fetch:binary()=>imgmeta:xmp()

<tag dir="xmp-XMP" name="xmp:ModifyDate">2015-07-16T14:56:03+01:00</tag>
<tag dir="xmp-XMP" name="dc:creator"/>
<tag dir="xmp-XMP" name="dc:creator[1]">Picasa</tag>
<tag dir="xmp-XMP" name="mwg-rs:Regions"/>
<tag dir="xmp-XMP" name="mwg-rs:Regions/mwg-rs:AppliedToDimensions"/>
<tag dir="xmp-XMP" name="mwg-rs:Regions/mwg-rs:AppliedToDimensions/stDim:h">1200</tag>
<tag dir="xmp-XMP" name="mwg-rs:Regions/mwg-rs:AppliedToDimensions/stDim:unit">pixel</tag>
<tag dir="xmp-XMP" name="mwg-rs:Regions/mwg-rs:AppliedToDimensions/stDim:w">1600</tag>
<tag dir="xmp-XMP" name="mwg-rs:Regions/mwg-rs:RegionList"/>
<tag dir="xmp-XMP" name="mwg-rs:Regions/mwg-rs:RegionList[1]"/>
<tag dir="xmp-XMP" name="mwg-rs:Regions/mwg-rs:RegionList[1]/mwg-rs:Name">train - kevin</tag>
<tag dir="xmp-XMP" name="mwg-rs:Regions/mwg-rs:RegionList[1]/mwg-rs:Type">Face</tag>
<tag dir="xmp-XMP" name="mwg-rs:Regions/mwg-rs:RegionList[1]/mwg-rs:Area"/>
<tag dir="xmp-XMP" name="mwg-rs:Regions/mwg-rs:RegionList[1]/mwg-rs:Area/stArea:h">0.384167</tag>
<tag dir="xmp-XMP" name="mwg-rs:Regions/mwg-rs:RegionList[1]/mwg-rs:Area/stArea:unit">normalized</tag>
<tag dir="xmp-XMP" name="mwg-rs:Regions/mwg-rs:RegionList[1]/mwg-rs:Area/stArea:w">0.24</tag>
<tag dir="xmp-XMP" name="mwg-rs:Regions/mwg-rs:RegionList[1]/mwg-rs:Area/stArea:x">0.399375</tag>
<tag dir="xmp-XMP" name="mwg-rs:Regions/mwg-rs:RegionList[1]/mwg-rs:Area/stArea:y">0.260417</tag>

Installation

The library is packaged in the EXpath xar format with the DrewNoakes jars included (version 2.11.0) It is targeted at BaseX. It was tested against BaseX version 8.9.0 beta. It can be installed into the BaseX repository by executing:

"https://github.com/expkg-zone58/metadata-extract/releases/download/v1.2.4/metadata-extractor-1.2.4.xar"
=>repo:install()

Versions

Basex 9.7+ requires metadata-extractor-1.3.x.xar +

Tests

The test.xqm script uses the BaseX Unit module

build

jar -cvfm bin/xx.jar manifest.MF