PHP | ImagickPixel setHSL() function
The ImagickPixel::setHSL() function is an inbuilt function in PHP which is used to set the color described by the ImagickPixel object using normalized values for hue, saturation and luminosity.
Syntax:
bool ImagickPixel::setHSL( float $hue, float $saturation, float $luminosity )
Parameters:This function accepts three parameters as mentioned above and described below:
- $hue: It specifies the normalized value for hue.
- $saturation: It specifies the normalized value for saturation.
- $luminosity: It specifies the normalized value for luminosity.
Return Value: This function returns TRUE on success.
Exceptions: This function throws ImagickException on error.
Below given programs illustrate the ImagickPixel::setHSL() function in PHP:
Program 1:
<?php// Create a new imagickPixel object$imagickPixel = new ImagickPixel(); // Set the HSL for pixel$imagickPixel->setHSL(0.4, 0.4, 0.4); // Get the HSL of pixel$HSL = $imagickPixel->getHSL();print("<pre>".print_r($HSL, true)."</pre>");?> |
Output:
Array
(
[hue] => 0.40000158942082
[saturation] => 0.4000152590219
[luminosity] => 0.4
)Program 2:
<?php// Create a new imagick object$imagick = new Imagick( // Get the pixel iterator to iterate through each pixel$imageIterator = $imagick->getPixelIterator(); // Loop through pixel rowsforeach ($imageIterator as $row => $pixels) { // Loop through the pixels in the row foreach ($pixels as $column => $pixel) { // Get the current HSL $HSL = $pixel->getHSL(); // Set the HSL and change only hue $pixel->setHSL(0.6, $HSL['saturation'], $HSL['luminosity']); } // Sync the iterator after each iteration $imageIterator->syncIterator();} header("Content-Type: image/jpg");echo $imagick;?> |
Output:
Reference: https://www.php.net/manual/en/imagickpixel.sethsl.php
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