我想把图片的每个像素的颜色值大于120的全部设置成20,设置完输出好象没反应.是不是方法不对
PHP code:
<?php
$res = imagecreatefromjpeg('test.jpg');
$size = getimagesize('test.jpg');
$width = $size[0];
$height = $size[1];
for ($w = 0; $w < $width; $w++)
{
for ($h = 0; $h < $height; $h++)
{
$resColor = imagecolorat($res, $h, $w);
$RGBArr = imagecolorsforindex($res, $resColor);
$r = $RGBArr['red'];
$g = $RGBArr['green'];
$b = $RGBArr['blue'];
if($r > 120)
{
$r = 20;
}
if($g > 120)
{
$g = 20;
}
if($b > 120)
{
$b = 20;
}
imagecolorallocate($res, $r, $g, $b);
}
}
imagejpeg($res);
大家看一下
<!--购买数量-->
<div class='buyinfo'>
<table width='auto'>
<tr>
<td><span>购买数量：</sp ......
