jimp-dev/jimp

Autocrop not cropping surrounding black area

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#753 opened on Jun 18, 2019

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Description

Large Black borders should have cropped out. I have adjusted the tolerance and have see no change in results. They are simply not getting cropped.

Latest Node and Jimp on a Raspberry Pi

   Jimp.read( "./scanimage.jpg", (err, img) => {
        if (err) throw err;
        let clean = img
        .scale(0.5)
        .quality(50)
        .autocrop()
        .write('./croppedimage.jpg')

test

Contributor guide

Research direction
Investigate the autocrop algorithm to understand how it handles black borders and tolerance. Check if there is a minimum border size requirement or if the tolerance parameter is not being applied correctly.
Tech stack
javascript
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.
70