lovell/sharp

Enhancement: expose vips_relational operation

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#1,015 opened on Nov 4, 2017

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 (3 comments) (0 reactions) (0 assignees)JavaScript (1,389 forks)batch import
enhancementhelp wanted

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Description

I want to process my images such that only pixels that are a given color (eg: RGB(0,0,100)) will appear in the final image as black, the rest should be white.

Is there any way to add a custom filter/function that is called for each pixel before it is added to the output?

Contributor guide

Research direction
Examine how sharp currently binds libvips operations; look at existing similar operations like vips relational in libvips API; implement a new binding in the source code.
Tech stack
javascriptnodejsc
Domain
backend
Issue type
Feature
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.
1-2 days
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.
Mostly clear
Prerequisites
JavaScriptNode.jsGit
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
50