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Date Posted: 20:27:52 07/21/03 Mon
Author: Michel
Subject: Re: Image format patent issues?
In reply to: Dave Bracken 's message, "Image format patent issues?" on 11:31:37 07/21/03 Mon

Hi Dave,

As far as I know, all formats used by Envision are not covered by active patents. The jpeg support is based on the indepedent jpeg group (an open source library also used by Delphi), and I have never heard that it was affected by any patent. I know png is patent free, since that was one of the goals when creating the format.

GIF is still in the gray zone, because I believe in some countries the patent has not expired.

Best regards,


>I was wondering if all of the file formats you support
>are freely usable. I am writing a commercial app that
>needs to view and write all of the formats you have in
>Envision. I have purchased version 2 and downloaded
>the upgrade.
>I just read an article about a jpeg patent owned by
>Forgent, but i am unclear as to whether that applies
>to hardware only or any software that uses jpeg
>images. I was also wondering about all the formats
>envision supports. I know the Gif patent expires next
>year(already expired in the US) but i will not be
>adding gif support right now anyway. But i need to be
>able to include jpg, bmp, png, etc.
>Any help you can give would be greatly appreciated.

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