eb

An OTP library for manipulating EXIF File Formats (JPEG). The main idea of this project is to learn binary data manipulation by using Erlang.

Run

./rebar3 shell
R = eb:exif_data_for("data/lake.JPG").
{[#{components => 1,
  data => 2,
  data_length => 2,
  data_type => unsigned_short,
  tag_name => y_cb_cr_positioning},
#{components => 20,
  data => <<"2009:01:07 12:21:55">>,
  data_length => 20,
  data_type => ascii_strings,
  tag_name => date_time},
#{components => 10,
  data => <<"Ver.1.01 ">>,
  data_length => 10,
  data_type => ascii_strings,
  tag_name => software},
#{components => 1,
  data => 2,
  data_length => 2,
  data_type => unsigned_short,
  tag_name => resolution_unit},
undefined,undefined,
#{components => 1,
  data => 1,
  data_length => 2,
  data_type => unsigned_short,
  tag_name => orientation},
#{components => 10,
  data => <<"NIKON D60">>,
  data_length => 10,
  data_type => ascii_strings,
  tag_name => model},
#{components => 18,
  data => <<"NIKON CORPORATION">>,
  data_length => 18,
  data_type => ascii_strings,
  tag_name => make}],
<<135,105,0,4,0,0,0,1,0,0,0,216,0,0,109,8,0,0,78,73,75,
 79,78,32,67,79,82,...>>}

Pointers

http://www.media.mit.edu/pia/Research/deepview/exif.html