The Imagick::uniqueImageColors() function is an inbuilt function in PHP which is used to discards all but one of any pixel color. This function is available in version 6.2.9 or newer.
Syntax:
bool Imagick::uniqueImageColors( void )
Parameters: This function does not accepts any parameters.
Return Value: This function returns True on success.
Below program illustrates the Imagick::uniqueImageColors() function in PHP:
Program:
<?php   // Create an Imagick object $imagick = new Imagick(   // Reduce the image to 256 colours nicely. $imagick->quantizeImage(256, \Imagick::COLORSPACE_YIQ, 0, false, false);   // Use uniqueImageColors function to distinguish the color of image $imagick->uniqueImageColors();   // Scale the output image $imagick->scaleimage($imagick->getImageWidth() * 10,               $imagick->getImageHeight() * 50); header("Content-Type: image/png");   // Display the output image echo $imagick->getImageBlob(); ?> |
Output:
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Reference: http://php.net/manual/en/imagick.uniqueimagecolors.php
