mapbox / mapbox/rio-rgbify

Support writing PNGs with filter 3

Open
#3 5 comments 1 reaction 0 assignees View on GitHub
Dominant language
Python
Stars
125
Forks
46
PR merge metrics
No merged PRs in 30d

Description

Using [filter 3](https://www.w3.org/TR/PNG-Filters.html) results in ~30% smaller PNG files in some situations.

Contributor guide

Open the contributing guide

Research direction

No files, tests, or entry points are mentioned. Start by reading the PNG Filters specification and locating the repository's existing PNG-writing path and filter selection; done means PNG output supports filter 3 and the behavior is covered by the project's existing tests.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
data
Issue type
Feature
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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