Example of getting the RGB color value of an image in php, _PHP tutorial

Example of php getting the RGB color value of an image,

Example of php getting the RGB color value of an image

Many picture sites The main color value of the image will be retrieved based on the image uploaded by the user, and then related images will be searched by color.

I used to scale (or mosaic) the image according to the online method and then traverse each pixel, and then count the value with the most RGB times. This method is too inefficient and the RGB value obtained is not accurate enough. Later I discovered that using Imagick’s quantizeImage method can easily get the average RGB value in the image.

<span>$average</span> = <span>new</span> Imagick("xiaocai.jpg"<span>);

</span><span>$average</span>->quantizeImage( 10, Imagick::COLORSPACE_RGB, 0, <span>false</span>, <span>false</span><span> );

</span><span>$average</span>-><span>uniqueImageColors();

</span><span>function</span> GetImagesColor( Imagick <span>$im</span><span> ){

</span><span>$colorarr</span> = <span>array</span><span>();

</span><span>$it</span> = <span>$im</span>-><span>getPixelIterator();

</span><span>$it</span>-><span>resetIterator();

</span><span>while</span>( <span>$row</span> = <span>$it</span>-><span>getNextIteratorRow() ){

</span><span>foreach</span> ( <span>$row</span> <span>as</span> <span>$pixel</span><span> ){
// www.jbxue.com
</span><span>$colorarr</span>[] = <span>$pixel</span>-><span>getColor();

}

}

</span><span>return</span> <span>$colorarr</span><span>;

}

</span><span>$colorarr</span> = GetImagesColor(<span>$average</span><span>);

</span><span>foreach</span>(<span>$colorarr</span> <span>as</span> <span>$val</span><span>){

</span><span>echo</span> "<div style='background-color: rgb({<span>$val</span>['r']},{<span>$val</span>['g']},{<span>$val</span>['b']});width:50px;height:50px;float:left;'></div>"<span>;

}</span><span> </span>

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