drewnoakes/metadata-extractor

Improve Makernote support

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#11 opened on Nov 19, 2014

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format-maker-noteshelp wanted

Description

There are a lot of different makernote tags out there. Many are documented online:

Hand-coding classes for all of these formats may not be the best approach. Some analysis could be done to see whether this could be data-driven (say from an XML file, for example), either at runtime or design time via codegen.

Adding support for these makernotes is quite easy, and a great place to get started if you want to contribute to this library.

(Migrated from Google Code issue 8)

Contributor guide

Tech stack
java
Domain
data
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
Java programmingfamiliarity with Exif metadata
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
85
Research direction
Examine the existing makernote implementations in the codebase (e.g., in com.drew.metadata.exif.makernotes) to understand the pattern. Then, for a specific camera manufacturer (e.g., Canon, Nikon), implement the corresponding makernote descriptor using the documented tags from the provided links. Optionally, consider if a data driven approach (e.g., XML configuration) could be used for future makernotes.