我从https://stackoverflow.com/a/32710756/1620626派生了一个完美的颜色替换脚本。我想用图像背景替换目标颜色。原始图像背景为浅绿色(rgb:0b255b1)
。我可以用蓝色替换它,但我不知道如何替换图像。这是剧本。
脚本完全用新的替换目标颜色。现在我想从蓝色变为背景。所以最后的想法是。这个女孩在我选择的背景图像上。
以下是代码:
<?php
//https://stackoverflow.com/a/32710756/1620626
function RGBtoHSL( $r, $g, $b ) {
$r /= 255;
$g /= 255;
$b /= 255;
$max = max( $r, $g, $b );
$min = min( $r, $g, $b );
$l = ( $max + $min ) / 2;
$d = $max - $min;
if( $d == 0 ){
$h = $s = 0;
} else {
$s = $d / ( 1 - abs( 2 * $l - 1 ) );
switch( $max ){
case $r:
$h = 60 * fmod( ( ( $g - $b ) / $d ), 6 );
if ($b > $g) {
$h += 360;
}
break;
case $g:
$h = 60 * ( ( $b - $r ) / $d + 2 );
break;
case $b:
$h = 60 * ( ( $r - $g ) / $d + 4 );
break;
}
}
return array( round( $h, 2 ), round( $s, 2 ), round( $l, 2 ) );
}
function HSLtoRGB( $h, $s, $l ){
$c = ( 1 - abs( 2 * $l - 1 ) ) * $s;
$x = $c * ( 1 - abs( fmod( ( $h / 60 ), 2 ) - 1 ) );
$m = $l - ( $c / 2 );
if ( $h < 60 ) {
$r = $c;
$g = $x;
$b = 0;
} else if ( $h < 120 ) {
$r = $x;
$g = $c;
$b = 0;
} else if ( $h < 180 ) {
$r = 0;
$g = $c;
$b = $x;
} else if ( $h < 240 ) {
$r = 0;
$g = $x;
$b = $c;
} else if ( $h < 300 ) {
$r = $x;
$g = 0;
$b = $c;
} else {
$r = $c;
$g = 0;
$b = $x;
}
$r = ( $r + $m ) * 255;
$g = ( $g + $m ) * 255;
$b = ( $b + $m ) * 255;
return array( floor( $r ), floor( $g ), floor( $b ) );
}
/* ---------------CHANGE THESE------------------- */
$colorToReplace = RGBtoHSL(0,255,1);//target color
$hueAbsoluteError = 7;//the more the clearer
$replacementColor = RGBtoHSL(0, 192, 239);//new color
/* ---------------------------------------------- */
$filename = 'images/01.png';
$im = imagecreatefrompng($filename);
$out = imagecreatetruecolor(imagesx($im), imagesy($im));
$transColor = imagecolorallocatealpha($out, 254, 254, 254, 127);
imagefill($out, 0, 0, $transColor);
for ($x = 0; $x < imagesx($im); $x++) {
for ($y = 0; $y < imagesy($im); $y++) {
$pixel = imagecolorat($im, $x, $y);
$red = ($pixel >> 16) & 0xFF;
$green = ($pixel >> 8) & 0xFF;
$blue = $pixel & 0xFF;
$alpha = ($pixel & 0x7F000000) >> 24;
$colorHSL = RGBtoHSL($red, $green, $blue);
if ((($colorHSL[0] >= $colorToReplace[0] - $hueAbsoluteError) && ($colorToReplace[0] + $hueAbsoluteError) >= $colorHSL[0])){
$color = HSLtoRGB($replacementColor[0], $replacementColor[1], $colorHSL[2]);
$red = $color[0];
$green= $color[1];
$blue = $color[2];
}
if ($alpha == 127) {
imagesetpixel($out, $x, $y, $transColor);
}
else {
imagesetpixel($out, $x, $y, imagecolorallocatealpha($out, $red, $green, $blue, $alpha));
}
}
}
imagecolortransparent($out, $transColor);
imagesavealpha($out, TRUE);
header('Content-type: image/png');
imagepng($out);
?>
答案 0 :(得分:6)
您可以只读取两个图像,源和背景,并从背景图像中获取像素并设置为源。
以下代码的最后一部分显示了这个想法:
<?php
namespace api\modules\v1\models;
use Yii;
class UserInfo extends \yii\db\ActiveRecord
{
/**
* @inheritdoc
*/
public static function tableName()
{
return 'user_info';
}
/**
* @inheritdoc
*/
public function rules()
{
return [
[['user_id'], 'required'],
[['user_id'], 'integer'],
...
];
}
/**
* @inheritdoc
*/
public function attributeLabels()
{
return [
'user_id' => 'User ID',
...
];
}
}
结果可能如下所示: