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image thresholding

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This commit is contained in:
Dennis Eichhorn 2022-02-13 23:57:33 +01:00
parent fea0569020
commit 625559977f
1 changed files with 2 additions and 2 deletions
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Image/Thresholding.php
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@ -81,7 +81,7 @@ final class Thresholding
$count = ($x2 - $x1) * ($y2 - $y1);
$sum = $intImg[$x2][$y2] - $intImg[$x2][$y1 - 1] - $intImg[$x1 - 1][$y2] + $intImg[$x1 - 1][$y1 - 1];
$rgb = \imagecolorat($im, $i, $j);
$rgb = \imagecolorat($im, $i, $j);
$brightness = self::lightness($rgb);
$color = $brightness * $count <= ($sum * (100 - $t) / 100) ? $black : $white;
@ -115,7 +115,7 @@ final class Thresholding
$lG = $vG <= 0.04045 ? $vG / 12.92 : \pow((($vG + 0.055) / 1.055), 2.4);
$lB = $vB <= 0.04045 ? $vB / 12.92 : \pow((($vB + 0.055) / 1.055), 2.4);
$y = 0.2126 * $lR + 0.7152 * $lG + 0.0722 * $lB;
$y = 0.2126 * $lR + 0.7152 * $lG + 0.0722 * $lB;
$lStar = $y <= 216 / 24389 ? $y * 24389 / 27 : \pow($y,(1 / 3)) * 116 - 16;
return $lStar / 100;