note 114451 added to imagick.contraststretchimage

Trying to figure out what values the black and white points can have and what their effects are nearly drove me around the bend. However, this works: <?php $width = 480; $height = 360; $mask = new Imagick (); $mask->newImage ($width, $height, "black"); $draw = new ImagickDraw (); $draw->setFillColor ("white"); $draw->ellipse ($width / 2, $height / 2, $width * 5 / 12, $height * 5 / 12, 0, 360); $mask->drawImage ($draw); $mask->blurImage (0, 50); $mask->contrastStretchImage (10, 125000); $mask->writeImage ("mask.png"); ?> The result will be a vignette mask with the pixels in the corner being pure black, and the ones in the middle pure white (which is not the case if the line is commented out). Reducing the white value to, say, 100, turns most of the grey pixels white. ---- Server IP: 213.172.110.14 Probable Submitter: 89.182.149.57 ---- Manual Page -- http://php.net/manual/en/imagick.contraststretchimage.php Edit -- https://master.php.net/note/edit/114451 Del: integrated -- https://master.php.net/note/delete/114451/integrated Del: useless -- https://master.php.net/note/delete/114451/useless Del: bad code -- https://master.php.net/note/delete/114451/bad+code Del: spam -- https://master.php.net/note/delete/114451/spam Del: non-english -- https://master.php.net/note/delete/114451/non-english Del: in docs -- https://master.php.net/note/delete/114451/in+docs Del: other reasons-- https://master.php.net/note/delete/114451 Reject -- https://master.php.net/note/reject/114451 Search -- https://master.php.net/manage/user-notes.php