pixelmatch | fastest JavaScript pixel-level image comparison library

by mapbox JavaScript Version: 4.0.2 License: ISC

X-Ray Key Features Code Snippets Community Discussions(3)Vulnerabilities Install Support

kandi X-RAY | pixelmatch Summary

pixelmatch is a JavaScript library. pixelmatch has no bugs, it has no vulnerabilities, it has a Permissive License and it has medium support. You can install using 'npm i pixelmatch' or download it from GitHub, npm.

The smallest, simplest and fastest JavaScript pixel-level image comparison library, originally created to compare screenshots in tests. Features accurate anti-aliased pixels detection and perceptual color difference metrics. Inspired by Resemble.js and Blink-diff. Unlike these libraries, pixelmatch is around 150 lines of code, has no dependencies, and works on raw typed arrays of image data, so it's blazing fast and can be used in any environment (Node or browsers).

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Support

pixelmatch has a medium active ecosystem.

It has 5334 star(s) with 310 fork(s). There are 142 watchers for this library.

It had no major release in the last 12 months.

There are 8 open issues and 76 have been closed. On average issues are closed in 61 days. There are 7 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of pixelmatch is 4.0.2

Quality

pixelmatch has 0 bugs and 0 code smells.

Security

pixelmatch has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

pixelmatch code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

pixelmatch is licensed under the ISC License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

pixelmatch releases are available to install and integrate.

Deployable package is available in npm.

Installation instructions, examples and code snippets are available.

Top functions reviewed by kandi - BETA

kandi has reviewed pixelmatch and discovered the below as its top functions. This is intended to give you an instant insight into pixelmatch implemented functionality, and help decide if they suit your requirements.

Check if two images have the same size
Find an ambient pixel between two pixel colors .
Calculate the difference of two images .
Finds the closest node between two nodes .
Draws a pixel on the image .
draws an individual pixel
Check if data is pixel data .
Blend a color to a color
Convert a color array to y - rgb
Convert RGB values to RGB

Get all kandi verified functions for this library.

pixelmatch Key Features

No Key Features are available at this moment for pixelmatch.

pixelmatch Examples and Code Snippets

No Code Snippets are available at this moment for pixelmatch.

Community Discussions

Trending Discussions on pixelmatch

function getting executed at the start of for loop instead of after it

Detecting image change by its binary size only

How can i get specific fileld from the Mongo DB

QUESTION

function getting executed at the start of for loop instead of after it

Asked 2022-Mar-09 at 23:11

So I'm trying to execute some code after a for loop in nodejs file

...

ANSWER

Answered 2022-Mar-09 at 23:11

You had a mix of some synchronous calls from the fs module and some asynchronous and the asynchronous ones were not waiting for your loops so things were going out of sequence.

Since this is a utility stand-alone script (not a server), you can just use the synchronous version of things everywhere and simplify your coding flow. Change fs.readdir() to fs.readdirSync() and fs.writeFile() to fs.writeFileSync().

Also, be sure to declare any variable before using it.

Source https://stackoverflow.com/questions/71401771

QUESTION

Detecting image change by its binary size only

Asked 2021-Nov-20 at 17:36

The binary size of an image file is affected by changing a single pixel. I'm curious if comparing the binary sizes of two photos is enough to detect a change! Will there be any false-positive outcomes? How reliable is this solution?

The images I'm comparing are in the 'PNG' format, and they're snapshots from the same source, so the quality and dimensions are identical, but the pixels may differ.

I'm aware of libraries like pixelmatch and img-diff-js, but they're too slow for my purposes, and I don't require extensive diff findings; just true/false will suffice.

...

ANSWER

Answered 2021-Nov-20 at 17:36

Assuming PNG files acquired and compressed by the same system, most files will have approximately the same size. A small change could cause the comprised image to be a byte longer or shorter, but there will be many, many different images with exactly the same file size.

But to find identical images you don’t need to decompress the PNG files, the compressed data will be identical for identical images, and different for different images. Also just comparing the files byte by byte will tell you if they contain identical images or not.

However, this is true only for identical images. If we’re talking about a camera producing a stream of images, and you wanting to know if something changed in the scene, then you will still have to compare the decompressed images. This is because the data will contain noise, and the noise will cause the compressed files to not be identical. And you can’t tell from the compressed file if the change is due to noise or a more important change. In this case, you will have to decompress the images, and compare them with some tolerance.

Source https://stackoverflow.com/questions/70046121

QUESTION

How can i get specific fileld from the Mongo DB

Asked 2021-Aug-15 at 12:59

I have written below code which is fetching 3 documents , from that document i want to display only specific filed excluding the other field

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ANSWER

Answered 2021-Aug-15 at 12:59

For official node.js MongoDB driver. The syntax for projection is like this

Source https://stackoverflow.com/questions/68790943

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install pixelmatch

Use in the browser from a CDN:.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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