Description

        jimp.read(Buffer.concat(buffers), (error, value) => {
            value.color([{apply:"saturate",params:[-70]}],console.log)
            value.write("a.png")
        });

Contributor guide

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.

3

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.

mostly clear

Prerequisites

basic understanding of image color modelsfamiliarity with Jimp library

Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.

60

Research direction

Investigate the saturation implementation in Jimp's color module (likely src/color.js or similar). Compare with GIMP's saturation algorithm to identify why colors appear abrupt. Look at the code handling the 'saturate' apply mode and check for any interpolation or clamping issues. Consider writing a small test script to reproduce and experiment. Examine existing tests for color operations to understand expected behavior.