Lossless JPEG

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This topic and its replies were posted before the current version of LEADTOOLS was released and may no longer be applicable.

#1 Posted : Tuesday, June 20, 2006 4:54:57 AM(UTC)

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hello,

I created a lossless jpeg file (see the attachment), but it looks like that this is not a JPEG standard, because no other application (other image viewers) can read this file. But I want to create a lossless jpeg which can be read from every other application.
What to do? We are using Raster-Api ver13.

thanks

File Attachment(s):

test1.jpg (307kb) downloaded 35 time(s).


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#2 Posted : Tuesday, June 20, 2006 6:37:41 AM(UTC)

Bashar

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The file is correct and standard, but most applications do not support
lossless JPEG. The only thing you can do to have other applications open your files is create lossy JPEGs.

#3 Posted : Wednesday, June 21, 2006 2:23:37 AM(UTC)

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thanks for your reply.

Jörg

#4 Posted : Wednesday, June 21, 2006 6:42:39 AM(UTC)

Bashar

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In lossy JPEG some of the colors are lost as a result of the
compression, which results in more compression. This is the opposite of lossless where no colors are lost.

To create lossy JPEGs just pass 2 or higher for the nQFactor parameter in the L_SaveBitmap method.

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