What JPEG library is part of the CentOS distribution?

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Ramon F. Herrera
Posts: 51
Joined: 2020/07/29 14:56:14

What JPEG library is part of the CentOS distribution?

Post by Ramon F. Herrera » 2020/09/16 20:06:17

I am trying to figure out how to sample the grayscale value of a given point from a JPEG image. There seems to be several libraries around:

http://www.openjpeg.org/

https://jpegclub.org/

https://libjpeg-turbo.org/

TIA,

-Ramon F. Herrera

chemal
Posts: 695
Joined: 2013/12/08 19:44:49

Re: What JPEG library is part of the CentOS distribution?

Post by chemal » 2020/09/16 20:22:34

libjpeg-turbo & openjpeg

Ramon F. Herrera
Posts: 51
Joined: 2020/07/29 14:56:14

Re: What JPEG library is part of the CentOS distribution?

Post by Ramon F. Herrera » 2020/09/18 12:57:41

chemal wrote:
2020/09/16 20:22:34
libjpeg-turbo & openjpeg
That is good to know, chemal.

Additionally, I received the response below.

Thanks!

-Ramon
JFK Numbers

==========================

To: Ramon F Herrera <ramon@jfknumbers.org>
From: Guido Vollbeding
Subject: Need assistance using the JPEG library

Dear Ramon

Thank you for feedback.

The IJG JPEG library is written in C programming language.
I don't know how you can use it from Javascript application.
I would guess that there are other solutions to process JPEG images in Javascript language.

The IJG JPEG library should also come with standard Linux distributions, but there are also fake versions distributed which are not recommended, see the README file in the IJG package.

Regards
Guido Vollbeding
Organizer Independent JPEG Group

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