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imagecolorclosesthwb
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imagecolorclosesthwb

Name

imagecolorclosesthwb — Finds closest color in image to that required.

Synopsis

int imagecolorclosesthwb(image, red, green, blue); int image: Image identifier int red: Red component int green: Green component int blue: Blue component

Returns

Color index

Description

Returns the closest match in the image palette to that specified in the function parameters. Unlike imagecolorclosest() , this function bases a match on the hue (H), whiteness (W), and blackness (B) closest to the specified color. It's more effective at matching than imagecolorclosest() . Requires GD version 1.8 or better.

Version

Existing since version 4.0.1

Example

Example 396. Get the actual color closest to the desired color from an image

header("Content-type: image/png");
$im = imagecreate(200, 200);
$red = imagecolorallocate($im, 255, 0, 0);
// create a shade of blue
$offblue = imagecolorallocate($im, 90, 90, 200);
imagefill($im, 0, 0, $red);
imagefilledrectangle($im, 10, 10, 40, 40, $offblue);
// get closest color to actual blue from image
$newblue = imagecolorclosesthwb($im, 0, 0, 255);
imagefilledrectangle($im, 100, 100, 140, 140, $newblue);
imagepng($im);
imagedestroy($im);

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