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Thread: GFWX: Good, Fast Wavelet Codec for images

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    GFWX: Good, Fast Wavelet Codec for images

    Saw this on the internet, not getting much attention:

    http://www.gfwx.org/

    Seems very neat.

  2. Thanks (7):

    Bulat Ziganshin (18th March 2016),encode (29th March 2016),Jon Sneyers (3rd April 2016),m^3 (18th March 2016),nemequ (18th March 2016),Stephan Busch (20th March 2016),Turtle (18th March 2016)

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    Does anybody know how to use the context mode?

    On my images (image tab of SqueezeChart), I am getting results between WEBP and PNG using
    GFWX_comp.exe with -q:1024 -c:1 -s:1

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    There's only source of the algorithm, no main function. Has anyone created it?

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    Quote Originally Posted by m^3 View Post
    There's only source of the algorithm, no main function. Has anyone created it?
    See the "Usage Examples" section. It uses OpenCV for loading/saving the images, but it shouldn't be too hard to port to something else (GDK-PixBuf comes to mind, maybe with pixman if necessary; I see a note about OpenCV using BGR instead of RGB…).

    Compilation fails here (F23, OpenCV 2.4.12.3) due to a missing header (opencv2/imgcodecs.hpp)… not sure if that's a Windows-only thing (Debian doesn't seem to have one, either), a packaging bug, or if it's just too new.

  6. Thanks:

    m^2 (21st March 2016)

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    I missed that.....
    Thanks!

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    Checked now. You have too old opencv.
    Had some other minor compilation issues, but the code seems to work for me now.

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    Member Alexander Rhatushnyak's Avatar
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    On LPCB images:

    1,265,863,748 bytes -s:1

    1,303,424,752 bytes -s:2

    1,629,115,572 bytes -s:3

    All decompressed files were bit-exact.

    Not sure how soon speeds will be measured...


    This newsgroup is dedicated to image compression:
    http://linkedin.com/groups/Image-Compression-3363256

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