YouTipPHP imagecolorclosest – Get the index of the color closest to the specified color |
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PHP imagecolorclosest - Get the index of the color closest to the specified color
imagecolorclosest — Get the index of the color closest to the specified color.
Syntax
int imagecolorclosest ( resource $image , int $red , int $green , int $blue )Returns the index of the color in the image palette that is "closest" to the specified RGB value.
The "distance" between the specified color and each color in the palette is calculated by treating the RGB values as coordinates of a point in a 3D space.
If the image was created from a file, only the colors used in the image are analyzed. Colors that appear only in the palette are not analyzed.
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imagecolorexact()Get the index of the specified color.