nabble /
ajde
| @@ 610-624 (lines=15) @@ | ||
| 607 | return ['X' => $r['X'] * $X, 'Y' => $r['Y'] * $Y, $Z => $r['Z'] * $Z]; |
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| 608 | } |
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| 609 | ||
| 610 | public function Lab_LCHab($o) |
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| 611 | { |
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| 612 | $H = atan2($o['b'], $o['a']) * (180 / PI); |
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| 613 | ||
| 614 | if ($H < 0) { |
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| 615 | $H += 360; |
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| 616 | } else { |
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| 617 | if ($H > 360) { |
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| 618 | $H -= 360; |
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| 619 | } |
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| 620 | } |
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| 621 | ||
| 622 | return ['L' => $o['L'], 'C' => sqrt($o['a'] * $o['a'] + $o['b'] * $o['b']), 'H' => $H]; |
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| 623 | } |
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| 624 | ||
| 625 | // CIE-L*uv (1976) = L: Luminescence / u: Saturation / v: Hue |
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| 626 | ||
| 627 | public function Luv_XYZ($o) |
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| @@ 646-659 (lines=14) @@ | ||
| 643 | return ['X' => $X, 'Y' => $Y, 'Z' => $Z]; |
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| 644 | } |
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| 645 | ||
| 646 | public function Luv_LCHuv($o) |
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| 647 | { |
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| 648 | $H = atan2($o['v'], $o['u']) * (180 / PI); |
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| 649 | ||
| 650 | if ($H < 0) { |
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| 651 | $H += 360; |
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| 652 | } else { |
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| 653 | if ($H > 360) { |
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| 654 | $H -= 360; |
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| 655 | } |
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| 656 | } |
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| 657 | ||
| 658 | return ['L' => $o['L'], 'C' => sqrt($o['u'] * $o['u'] + $o['v'] * $o['v']), 'H' => $H]; |
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| 659 | } |
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| 660 | ||
| 661 | // CIE-L*CH (1986) = L: Luminescece / C: Chromacity / H: Hue |
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| 662 | ||
