jimp-dev/jimp

Image color changed after resizing

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#787 opened on Sep 9, 2019

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bughelp wanted

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Description

Steps to Reproduce

const Jimp = require('jimp')

async function main() { const image = await Jimp.read( 'https://awsstage-test.s3.amazonaws.com/26836/1568007235421.jpg', ) image.quality(60).scale(0.4).write('scale1.png') }

main()

Screenshots Before Resize Inspection Quote 4-01

After Resize scale1

Context

  • Jimp Version: 0.6.0
  • Operating System: Linux 18.04
  • Node version: 10.15.1

Contributor guide

Research direction
Inspect the scaling code in Jimp, particularly the scale method and any color interpolation logic, to identify why colors shift after resizing.
Tech stack
javascriptnodejs
Domain
backend
Issue type
Bug
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.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
JavaScriptNode.js
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75