how to implement color search with sphinx? -

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searching photo dominant colors using mysql quite simple. assuming r,g,b values of dominant colors of photo stored in database, achieved example like:

select * colors    abs(dominant_r - :r) < :threshold ,      abs(dominant_g - :g) < :threshold ,      abs(dominant_b - :b) < :threshold

i wonder, if it's anyhow possible store colors in sphinx , perform querying using sphinx search engine?

thanks!

i have done search colors sphinx. it's there http://code.google.com/p/hppg/. how works? simple, each color store it's dominant colors in database. database table, witch used sphinx indexing, has column named "colors", it's content filled in following way:

/**      * part changed based on formula       *       * fits here better algorithm      *       * http://en.wikipedia.org/wiki/tag_cloud      * 15400 number of maximum matches based on indexed thumbnail size 120x130 px.      * */     $max = 15400;    $min = 25;    $rmax = 50;    $rmin = 1;     $colorindex = array();    foreach ($colorsmaximumimage $color)    {        $colorindexstring = trim(str_repeat(' pld'.$color['pallete_id'],round((($rmin*($color['count']-25))/($max-$min))*100)));        if ($colorindexstring != '')        $colorindex[] = $colorindexstring;    }

i used tagging formula here, avoid big index. count number of times custom pallete item matched. works fine, examples of live sites can found @ project home page. such way can search color , keyword @ same time :). i'm still experimenting best result of it...


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