把一張圖片（根據(jù)指定的RGB顏色范圍）透明化。$o_pic = '1.jpg';//要處理的色階起始值$begin_r = 215;$begin_g = 215;$begin_b = 215;
list($src_w,$src_h,$src_type) = getimagesize($o_pic);// 獲取原圖像信息$file_ext = get_ext($o_pic);//獲取擴(kuò)展名$target_im = imagecreatetruecolor($src_w,$src_h);//新圖if($file_ext == 'jpg') //轉(zhuǎn)換JPG 開始
{ $src_im = ImageCreateFromJPEG($o_pic);
imagecopymerge($target_im,$src_im,0,0,0,0,$src_w,$src_h,100); for($x = 0; $x < $src_w; $x++)
{ for($y = 0; $y < $src_h; $y++)
{ $rgb = imagecolorat($src_im, $x, $y); $r = ($rgb >> 16) & 0xFF; $g = ($rgb >> 8) & 0xFF; $b = $rgb & 0xFF; if($r > $begin_r && $g > $begin_g && $b > $begin_b ){
imagecolortransparent($target_im, imagecolorallocate($target_im,$r, $g, $b));
}
}
}
}
2 回答
倚天杖
TA貢獻(xiàn)1828條經(jīng)驗(yàn) 獲得超3個(gè)贊
/**
* Created by PhpStorm.
* User: shellus
* Date: 2016-12-01
* Time: 23:12
*/
require 'vendor/autoload.php';
// import the Intervention Image Manager Class
use Intervention\Image\ImageManager;
// create an image manager instance with favored driver
$manager = new ImageManager(array('driver' => 'gd'));
$img = $manager->make('1.jpg');
for ($y = 0; $y < $img->height(); $y++)
{
for ($x = 0; $x < $img->width(); $x++)
{
$c = $img -> pickColor($x, $y, 'array');
if(abs($c[0] - 205) < 50 && abs($c[1] - 223) < 50 && abs($c[2] - 211) < 50 ){
$c[0] = $c[1] = $c[2] = 255;
$img -> pixel($c, $x, $y);
}
}
}
$img -> save();
白衣染霜花
TA貢獻(xiàn)1796條經(jīng)驗(yàn) 獲得超10個(gè)贊
請(qǐng)不要用jpg,因?yàn)閖pg不支持透明所以變白了,用imagecreatetruecolor或是imagecreatefrompng
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