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  1. #1
    Regular Contributor
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    Jan 2014
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    145

    Creating preview-thumbnails of default SDK filters!

    I want to create a list of preview thumbnails of an edited image using the default filters from the SDK.
    So that user can check the image filter effect in thumbnails and select one.

    Any sample project or idea of doing so is most appreciable.

    Thank you

  2. #2
    Nokia Developer Moderator
    Join Date
    Feb 2006
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    Oslo, Norway
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    28,763

    Re: Creating preview-thumbnails of default SDK filters!

    My impression is that the Filter Explorer sample (from http://developer.nokia.com/resources...-projects.html) could be a good starting point for that.

  3. #3
    Regular Contributor
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    Jan 2014
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    145

    Re: Creating preview-thumbnails of default SDK filters!

    Thank you will look into that..and will post here if I face problems

  4. #4
    Nokia Developer Champion
    Join Date
    Mar 2013
    Posts
    526

    Re: Creating preview-thumbnails of default SDK filters!

    The basic idea would be to create a down-sized thumbnail of the original image which you will then use as the source for all effect applications (this avoids the downscaling being done again for each preview image). Another thing you should handle is that some filters have strength parameters that work based on a pixel radius (e.g. Blur Radius). You should reduce that by the same factor that you downsize the thumbnails because otherwise the blur to the thumbnail will be much stronger than what it will actually be when applying the effect.

  5. #5
    Regular Contributor
    Join Date
    Jan 2014
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    145

    Re: Creating preview-thumbnails of default SDK filters!

    Thank you, i'll consider it..

    Do you suggest me an idea to databind all the preview thumbnails in a long list?

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