changeDPI | Javascript library that allows you to change an image | Computer Vision library

by shutterstock JavaScript Version: 1.0.4 License: MIT

X-Ray Key Features Code Snippets Community Discussions(2)Vulnerabilities Install Support

kandi X-RAY | changeDPI Summary

changeDPI is a JavaScript library typically used in Artificial Intelligence, Computer Vision applications. changeDPI has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can install using 'npm i changedpi' or download it from GitHub, npm.

changeDPI provides 2 utility functions that can change the dpi of canvas-generated image, of either dataUrl or blob formats. The functions separate the header from the image data, convert and manipulate just the header, then sticks the header back on the file. In this way, very large images can be converted quickly without having to convert the entire contents of an image file. This process is non-destructive—image data does not get modified in the process.

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Quality

Security

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Support

changeDPI has a low active ecosystem.

It has 159 star(s) with 46 fork(s). There are 6 watchers for this library.

It had no major release in the last 12 months.

There are 5 open issues and 5 have been closed. On average issues are closed in 17 days. There are 2 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of changeDPI is 1.0.4

Quality

changeDPI has 0 bugs and 0 code smells.

Security

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

changeDPI code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

changeDPI is licensed under the MIT License. This license is Permissive.

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

Reuse

changeDPI releases are not available. You will need to build from source code and install.

Deployable package is available in npm.

Installation instructions, examples and code snippets are available.

Top functions reviewed by kandi - BETA

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

Change dpi field on data
Change data URL to the data URL .
Change DFP on the data part of the blob .
Create pcb - random data
Search for start of header
Detect if the data chunk is a base64 URL .
Calculate the crc .
Converts a value to an array .

Get all kandi verified functions for this library.

changeDPI Key Features

No Key Features are available at this moment for changeDPI.

changeDPI Examples and Code Snippets

No Code Snippets are available at this moment for changeDPI.

Community Discussions

Trending Discussions on changeDPI

Trying to change image DPI without changing file size

Change JPEG file DPI header in Node.js

QUESTION

Trying to change image DPI without changing file size

Asked 2020-Jan-20 at 08:30

I have the following code for changing the DPI of an image:

...

ANSWER

Answered 2019-Dec-02 at 20:48

I think you must indicate the format of the output file, to save as a compressed image format like JPEG.

Source https://stackoverflow.com/questions/59146189

QUESTION

Change JPEG file DPI header in Node.js

Asked 2019-Nov-27 at 10:42

I have a file (for example JPEG size 1588 × 2244px). It's generated by puppeteer (but phantomjs also generate 72 DPI screenshot). When I save this image into a file with .jpeg extension and I use macOS General Info I see:

As you can see it has 72 DPI set in metadata, but I want to use file with 300 DPI. I know, that in digital it doesn't change anything - it's property for printing, but I don't want to explain to each customer that this file could be print in 300 DPI.

When I use Gimp and Image > Print Size

I can change the DPI, and export a picture again. And now it has 300 DPI in General Info window.

I try to do it in Node.JS server, but I found few options to change this property on .PNG pictures, but anyone is working for .JPEG files.

I think that the most accurate option is to use method changeDpiDataUrl from this library: https://github.com/shutterstock/changeDPI/blob/master/src/index.js But when I put my image as base64image, after a split operation I have the array with 1 element only - I think that this is body, so I don't have format property (at 63 line).

Anybody meet this problem before?

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ANSWER

Answered 2019-Sep-08 at 18:46

You can use the library piexifjs to change the EXIF data of an image. The library only changes the meta data (called EXIF), not the image itself.

Code Sample

The following code uses the API to read the EXIF data of an image, change it and create a new buffer from the changed data.

Source https://stackoverflow.com/questions/57843481

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