php图像处理各种方法集合(缩放、剪裁、缩放、翻转、旋转、透明、锐化)

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php图像处理各种方法集合(缩放、剪裁、缩放、翻转、旋转、透明、锐化)

收藏一下资源：

一、创建图片资源

代码语言：javascript复制imagecreatetruecolor(width,height);

imagecreatefromgif(图片名称);

imagecreatefrompng(图片名称);

imagecreatefromjpeg(图片名称);画出各种图像

代码语言：javascript复制imagegif(图片资源,保存路径);

imagepng()

imagejpeg();二、获取图片属性

代码语言：javascript复制imagesx(res)//宽度

imagesy(res)//高度

getimagesize(文件路径)

返回一个具有四个单元的数组。索引 0 包含图像宽度的像素值，索引 1 包含图像高度的像素值。索引 2 是图像类型的标记：1 = GIF，2 = JPG，3 = PNG，4 = SWF，5 = PSD，6 = BMP，7 = TIFF(intel byte order)，8 = TIFF(motorola byte order)，9 = JPC，10 = JP2，11 = JPX，12 = JB2，13 = SWC，14 = IFF，15 = WBMP，16 = XBM。这些标记与 PHP 4.3.0 新加的 IMAGETYPE 常量对应。索引 3 是文本字符串，内容为“height="yyy" width="xxx"”，可直接用于 IMG 标记。销毁图像资源

imagedestroy(图片资源);三、透明处理

PNG、jpeg透明色都正常，只有gif不正常

代码语言：javascript复制imagecolortransparent(resource image [,int color])//将某个颜色设置成透明色

imagecolorstotal()

imagecolorforindex();四、图片的裁剪

代码语言：javascript复制imagecopyresized()

imagecopyresampled();五、加水印（文字、图片）

字符串编码转换

代码语言：javascript复制string iconv ( string $in_charset , string $out_charset , string $str )六、图片旋转

代码语言：javascript复制imagerotate();//制定角度的图片翻转八、锐化

代码语言：javascript复制imagecolorsforindex()

imagecolorat()在图片上画图形

代码语言：javascript复制 $img=imagecreatefromgif("./images/map.gif");

$red= imagecolorallocate($img, 255, 0, 0);

imageline($img, 0, 0, 100, 100, $red);

imageellipse($img, 200, 100, 100, 100, $red);

imagegif($img, "./images/map2.gif");

imagedestroy($img);图片普通缩放

$filename="./images/hee.jpg";

$per=0.3;

list($width, $height)=getimagesize($filename);

$n_w=$width*$per;

$n_h=$width*$per;

$new=imagecreatetruecolor($n_w, $n_h);

$img=imagecreatefromjpeg($filename);

//拷贝部分图像并调整

imagecopyresized($new, $img,0, 0,0, 0,$n_w, $n_h, $width, $height);

//图像输出新图片、另存为

imagejpeg($new, "./images/hee2.jpg");

imagedestroy($new);

imagedestroy($img);图片等比例缩放、没处理透明色

function thumn($background, $width, $height, $newfile) {

list($s_w, $s_h)=getimagesize($background);//获取原图片高度、宽度

if ($width && ($s_w < $s_h)) {

$width = ($height / $s_h) * $s_w;

} else {

$height = ($width / $s_w) * $s_h;

}

$new=imagecreatetruecolor($width, $height);

$img=imagecreatefromjpeg($background);

imagecopyresampled($new, $img, 0, 0, 0, 0, $width, $height, $s_w, $s_h);

imagejpeg($new, $newfile);

imagedestroy($new);

imagedestroy($img);

}

thumn("images/hee.jpg", 200, 200, "./images/hee3.jpg");gif透明色处理

function thumn($background, $width, $height, $newfile) {

list($s_w, $s_h)=getimagesize($background);

if ($width && ($s_w < $s_h)) {

$width = ($height / $s_h) * $s_w;

} else {

$height = ($width / $s_w) * $s_h;

}

$new=imagecreatetruecolor($width, $height);

$img=imagecreatefromgif($background);

$otsc=imagecolortransparent($img);

if($otsc >=0 && $otst < imagecolorstotal($img)){//判断索引色

$tran=imagecolorsforindex($img, $otsc);//索引颜色值

$newt=imagecolorallocate($new, $tran["red"], $tran["green"], $tran["blue"]);

imagefill($new, 0, 0, $newt);

imagecolortransparent($new, $newt);

}

imagecopyresized($new, $img, 0, 0, 0, 0, $width, $height, $s_w, $s_h);

imagegif($new, $newfile);

imagedestroy($new);

imagedestroy($img);

}

thumn("images/map.gif", 200, 200, "./images/map3.gif");图片裁剪

function cut($background, $cut_x, $cut_y, $cut_width, $cut_height, $location){

$back=imagecreatefromjpeg($background);

$new=imagecreatetruecolor($cut_width, $cut_height);

imagecopyresampled($new, $back, 0, 0, $cut_x, $cut_y, $cut_width, $cut_height,$cut_width,$cut_height);

imagejpeg($new, $location);

imagedestroy($new);

imagedestroy($back);

}

cut("./images/hee.jpg", 440, 140, 117, 112, "./images/hee5.jpg");图片加水印文字水印

代码语言：javascript复制function mark_text($background, $text, $x, $y){

$back=imagecreatefromjpeg($background);

$color=imagecolorallocate($back, 0, 255, 0);

imagettftext($back, 20, 0, $x, $y, $color, "simkai.ttf", $text);

imagejpeg($back, "./images/hee7.jpg");

imagedestroy($back);

}

mark_text("./images/hee.jpg", "细说PHP", 150, 250);

//图片水印

function mark_pic($background, $waterpic, $x, $y){

$back=imagecreatefromjpeg($background);

$water=imagecreatefromgif($waterpic);

$w_w=imagesx($water);

$w_h=imagesy($water);

imagecopy($back, $water, $x, $y, 0, 0, $w_w, $w_h);

imagejpeg($back,"./images/hee8.jpg");

imagedestroy($back);

imagedestroy($water);

}

mark_pic("./images/hee.jpg", "./images/gaolf.gif", 50, 200);图片旋转

$back=imagecreatefromjpeg("./images/hee.jpg");

$new=imagerotate($back, 45, 0);

imagejpeg($new, "./images/hee9.jpg");图片水平翻转垂直翻转

function turn_y($background, $newfile){

$back=imagecreatefromjpeg($background);

$width=imagesx($back);

$height=imagesy($back);

$new=imagecreatetruecolor($width, $height);

for($x=0; $x < $width; $x++){

imagecopy($new, $back, $width-$x-1, 0, $x, 0, 1, $height);

}

imagejpeg($new, $newfile);

imagedestroy($back);

imagedestroy($new);

}

function turn_x($background, $newfile){

$back=imagecreatefromjpeg($background);

$width=imagesx($back);

$height=imagesy($back);

$new=imagecreatetruecolor($width, $height);

for($y=0; $y < $height; $y++){

imagecopy($new, $back,0, $height-$y-1, 0, $y, $width, 1);

}

imagejpeg($new, $newfile);

imagedestroy($back);

imagedestroy($new);

}

turn_y("./images/hee.jpg", "./images/hee11.jpg");

turn_x("./images/hee.jpg", "./images/hee12.jpg"); 图片锐化

function sharp($background, $degree, $save){

$back=imagecreatefromjpeg($background);

$b_x=imagesx($back);

$b_y=imagesy($back);

$dst=imagecreatefromjpeg($background);

for($i=0; $i<$b_x; $i++){

for($j=0; $j<$b_y; $j++){

$b_clr1=imagecolorsforindex($back, imagecolorat($back, $i-1, $j-1));\前一个像素颜色数组

$b_clr2=imagecolorsforindex($back, imagecolorat($back, $i, $j));\取出当前颜色数组

$r=intval($b_clr2["red"]+$degree*($b_clr2["red"]-$b_clr1["red"]));\加深

$g=intval($b_clr2["green"]+$degree*($b_clr2["green"]-$b_clr1["green"]));

$b=intval($b_clr2["blue"]+$degree*($b_clr2["blue"]-$b_clr1["blue"]));

$r=min(255, max($r, 0));//限制r范围在0-255之间

$g=min(255, max($g, 0));

$b=min(255, max($b, 0));

if(($d_clr=imagecolorexact($dst, $r, $g, $b))==-1){//等于1不在颜色范围内

$d_clr=Imagecolorallocate($dst, $r, $g, $b);//创建一个颜色

}

imagesetpixel($dst, $i, $j, $d_clr);

}

}

imagejpeg($dst, $save);

imagedestroy($back);

imagedestroy($dst);

}

sharp("./images/hee.jpg", 20, "./images/hee13.jpg");代码语言：javascript复制

//step 1创建图片资源

$img=imagecreatetruecolor(200,200);

$red=imagecolorallocate($img,255,0,0);

$yellow=imagecolorallocate($img,255,255,0);

$green=imagecolorallocate($img,0,255,0);

$blue=imagecolorallocate($img,0,0,255);

imagefill($img,0,0,$yellow);//颜色填充

//step2画各种图形

imagefilledrectangle($img,10,10,80,80,$red);//画矩形并填充

imagerectangle($img,10,10,80,80,$red));//画矩形不填充，颜色填充

//线段

imageline($img,0, 0, 200, 200 ,$blue);

imageline($img,200, 0, 0, 200, $blue);

//点

imagesetpixel($img,50, 50 ,$red);

imagesetpixel($img,55, 50 ,$red);

imagesetpixel($img,59, 50 ,$red);

imagesetpixel($img,64, 50 ,$red);

imagesetpixel($img,72, 50 ,$red);

//圆

imageellipse($img, 100, 100, 100, 100,$green);

//圆

imagefilledellipse($img, 100, 100, 10, 10,$blue);

//边框

//输出图像或保存图像

header("Content-Type:img/gif");

imagegif($img);

//释放资源

imagedestory($img);

画饼状图

//step 1创建图片资源

$img=imagecreatetruecolor(200, 200);

// $img=imagecreate(200, 200);

$white=imagecolorallocate($img, 255, 255, 255);

$gray=imagecolorallocate($img, 0xC0, 0xC0, 0xC0);

$darkgray=imagecolorallocate($img, 0x90, 0x90, 0x90);

$navy=imagecolorallocate($img, 0, 0, 0x80);

$darknavy=imagecolorallocate($img, 0, 0, 0x50);

$red= imagecolorallocate($img, 0xFF, 0, 0);

$darkred=imagecolorallocate($img, 0x90, 0, 0);

imagefill($img, 0, 0, $white);

//3D效果

for($i=60; $i>50; $i--){

imagefilledarc($img, 50, $i,100, 50, -160, 40, $darkgray, IMG_ARC_PIE);

imagefilledarc($img, 50, $i,100, 50, 40, 75, $darknavy, IMG_ARC_PIE);

imagefilledarc($img, 50, $i,100, 50, 75, 200, $darkred, IMG_ARC_PIE);

}

imagefilledarc($img, 50, $i,100, 50, -160, 40, $gray, IMG_ARC_PIE);

imagefilledarc($img, 50, $i,100, 50, 40, 75, $navy, IMG_ARC_PIE);

imagefilledarc($img, 50, $i,100, 50, 75, 200, $red, IMG_ARC_PIE);

header("Content-Type:image/gif");

imagegif($img);

//释放资源

imagedestroy($img);画文字代码语言：javascript复制

//step 1创建图片资源

$img=imagecreatetruecolor(200, 200);

// $img=imagecreate(200, 200);

$white=imagecolorallocate($img, 255, 255, 255);

$gray=imagecolorallocate($img, 0xC0, 0xC0, 0xC0);

$darkgray=imagecolorallocate($img, 0x90, 0x90, 0x90);

$navy=imagecolorallocate($img, 0, 0, 0x80);

$darknavy=imagecolorallocate($img, 0, 0, 0x50);

$red= imagecolorallocate($img, 0xFF, 0, 0);

$darkred=imagecolorallocate($img, 0x90, 0, 0);

imagefill($img, 0, 0, $gray);

imagechar($img, 5, 100, 100, "A", $red);

imagechar($img, 5, 120, 120, "B", $red);

imagecharup($img, 5, 60, 60, "C", $red);

imagecharup($img, 5, 80, 80, "D", $red);

imagestring($img, 3, 10, 10, "Hello", $navy);

imagestringup($img, 3, 10, 80, "Hello", $navy);

imagettftext($img, 25, 60, 150, 150, $red, "simkai.ttf", "##");

imagettftext($img, 12, -60, 50, 150, $red, "simli.ttf", "##");

header("Content-Type:image/gif");

imagegif($img);

//释放资源

imagedestroy($img);2、处理原有的图像

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