Imagick::contrastImageImagick::contrastStretchImage
(PECL imagick 2.0.0)
Imagick::contrastStretchImage — Enhances the contrast of a color image
Descrição
bool Imagick::contrastStretchImage
( float $black_point
, float $white_point
[, int $channel = Imagick::CHANNEL_ALL
] )
Enhances the contrast of a color image by adjusting the pixels color to span the entire range of colors available. Este método esta disponível apenas se Imagick foi compilado com ImageMagick versão 6.2.9 ou mais nova.
Parâmetros
- black_point
-
The black point.
- white_point
-
The white point.
- channel
-
Provide any channel constant that is valid for your channel mode. To apply to more than one channel, combine channeltype constants using bitwise operators. Imagick::CHANNEL_ALL. Refer to this list of channel constants.
Valor Retornado
Retorna TRUE em sucesso.
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