drewnoakes/metadata-extractor

CR3 Support for Canon Lossy RAWs

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#374 opened on Oct 30, 2018

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 (8 comments) (0 reactions) (0 assignees)Java (2,411 stars) (470 forks)batch import
format-camera-rawhelp wantedimage-queue

Description

Would it be possible to add support for the Canon CR3 raw files, see: https://github.com/lclevy/canon_cr3 Thank you very much!

Here is some sample files: https://www.dropbox.com/scl/fi/4b5kpcwq2rhne452h5q3e/Canon_CR3.7z?rlkey=28bnu33nrskzt7u57umgjss4l&dl=1

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.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
over 1 week
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.
needs investigation
Prerequisites
Java programmingUnderstanding of CR3 formatFamiliarity with metadata extractor codebase
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
20
Research direction
First, study the CR3 specification linked in the issue (https://github.com/lclevy/canon cr3). Then, examine the existing codebase for how other raw formats (e.g., CR2) are supported in the library, specifically looking at classes like 'JpegMetadataReader' or 'ExifReader'. The implementation would likely involve a new reader class and integration into the existing metadata extraction pipeline. The sample files provided can be used for testing. There are 8 comments in the issue that may contain additional context.