代码语言：javascript复制
此源码有个阈值可以自己调节,精确度等自测
<?php
/*$Colorimg = new Colorimg();
$image=$Colorimg->IMGaction("G:/www/20161220/demo/5.jpg",1,1,50);
//告诉浏览器以图片形式解析
header('content-type:image/jpeg');
imagejpeg($image, "G:/www/20161220/demo/3.jpg");
*/
class Colorimg
{
public $image;//图片
private $cs;//比对阈值
public function IMGaction($imgurl,$if_url=1,$if_deflate=0,$cs='50') {
if($if_url==1) {
$image = $this->ImgcolorCRRATE($imgurl);
}else{
$image = $imgurl;
}
if($if_deflate==1) {
$image = $this->ImgDEFLATE($image);
}
//平均值
$sample = $this->ColorGETMEANrgb($image);
$image=$this->ImgsetPIXEL($image,$sample,$cs);
return $image;
}
/**
* 打开一张图片
*/
public function ImgcolorCRRATE($image)
{
list($width, $height) = getimagesize($image);//获取图片信息
$img_info = getimagesize($image);
switch ($img_info[2]) {
case 1:
$img = imagecreatefromgif($image);
break;
case 2:
$img = imagecreatefromjpeg($image);
break;
case 3:
$img = imagecreatefrompng($image);
break;
}
return $img;
}
/**
* $rate为图片长宽最大值
*/
public function ImgDEFLATE($image, $rate = '800')
{
$w = imagesx($image);
$h = imagesy($image);
//指定缩放出来的最大的宽度（也有可能是高度）
$max = $rate;
//根据最大值为300，算出另一个边的长度，得到缩放后的图片宽度和高度
if ($w > $h) {
$w = $max;
$h = $h * ($max / imagesx($image));
} else {
$h = $max;
$w = $w * ($max / imagesy($image));
}
//声明一个$w宽，$h高的真彩图片资源
$i = imagecreatetruecolor($w, $h);
//关键函数，参数（目标资源，源，目标资源的开始坐标x,y, 源资源的开始坐标x,y,目标资源的宽高w,h,源资源的宽高w,h）
imagecopyresampled($i, $image, 0, 0, 0, 0, $w, $h, imagesx($image), imagesy($image));
return $i;
}
/**
* 传入多维数组n个点计算平均值
*$rgbarrays=array(
* $rgb1=array(
* 'r'=>255,
* 'g'=>255,
* 'b'=>255
* )
* )
*/
public function ColorRECKmean($rgbarrays)
{
//获取总共几个点
$sum = count($rgbarrays);
$mean1['r'] = '';
$mean1['g'] = '';
$mean1['b'] = '';
foreach ($rgbarrays as $rbg) {
$mean1['r'] = $rbg['r'];
$mean1['g'] = $rbg['g'];
$mean1['b'] = $rbg['b'];
}
$mean['r'] = intval($mean1['r'] / $sum);
$mean['g'] = intval($mean1['g'] / $sum);
$mean['b'] = intval($mean1['b'] / $sum);
return $mean;
}
/**
* 取四个点,返回平均点的rgb数组
*/
public function ColorGETMEANrgb($image)
{
$rgb1 = imagecolorat($image, 0, 0);
$rgb2 = imagecolorat($image, 0, imagesy($image) - 1);
$rgb3 = imagecolorat($image, imagesx($image) - 1, 0);
$rgb4 = imagecolorat($image, imagesx($image) - 1, imagesy($image) - 1);
//平均值
$sample = $this->ColorRECKmean(array($this->ColorRGBresolved($rgb1)), $this->ColorRGBresolved($rgb2), $this->ColorRGBresolved($rgb3), $this->ColorRGBresolved($rgb4));
return $sample;
}
public function ImgsetPIXEL($image,$sample,$cs){
//如果相似就加一个白色的点
for ($x = 0; $x < imagesx($image); $x ) {
for ($y = 0; $y < imagesy($image); $y ) {
$rgb = imagecolorat($image, $x, $y);
$than = $this->ColorTHANrgb($this->ColorRGBComp($this->ColorRGBresolved($rgb), $sample),$cs);
if ($than) {
$color = imagecolorallocate($image, 255, 255, 255);
imagesetpixel($image, $x, $y, $color);
}
}
}
return $image;
}
/**
* 比对颜色相似度
* $rgb1和$rgb2必须数组$rgb['r']....
*/
public function ColorRGBComp($rgb1, $rgb2)
{
$tbsr = abs($rgb1['r'] - $rgb2['r']);
$tbsg = abs($rgb1['g'] - $rgb2['g']);
$tbsb = abs($rgb1['b'] - $rgb2['b']);
$cv = sqrt(pow($tbsr, 2) pow($tbsg, 2) pow($tbsb, 2));
return $cv;
}
/**
*把rgb颜色分解成数组
*
*/
function ColorRGBresolved($rgb)
{
$img['r'] = intval(($rgb >> 16) & 0xFF);
$img['g'] = intval(($rgb >> 8) & 0xFF);
$img['b'] = intval(($rgb) & 0xFF);
return $img;
}
/**
* 对比像素是否相似,相似返回true
*/
public function ColorTHANrgb($cv, $cs)
{
if ($cv <=$cs) {
return true;
} else {
return false;
}
}
}本文为仙士可原创文章,转载无需和我联系,但请注明来自仙士可博客www.php20.cn
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