Home > Article > Backend Development > php_imagick method to realize image cutting, rotation, sharpening, color reduction or adding special effects, _PHP tutorial
php_imagick method to realize image cutting, rotation, sharpening, color reduction or adding special effects, _PHP tutorial
- WBOYOriginal
- 2016-07-13 10:11:31689browse
php_imagick implements image cutting, rotation, sharpening, color reduction or adding special effects,
The example in this article describes the method of php_imagick to realize image cutting, rotation, sharpening, color reduction or adding special effects. Share it with everyone for your reference. The specific analysis is as follows:
A PHP extension that allows PHP to call the ImageMagick function. Using this extension allows PHP to have the same functionality as ImageMagick.
ImageMagick is a powerful, stable and free toolset and development package that can be used to read, write and process image files in more than 185 basic formats, including popular TIFF, JPEG, GIF, PNG, PDF and PhotoCD and other formats. Using ImageMagick, you can dynamically generate images according to the needs of web applications. You can also change the size, rotate, sharpen, reduce color or add special effects to an image (or a group of images), and save the results in the same format. or save in other formats.
php_imagick is an extension package for PHP image processing. It can complete operations such as changing the size, rotating, sharpening, subtracting colors or adding special effects to images.
1. Install Imagick extension under windows:
1. Download ImageMagick and install it
http://image_magick.veidrodis.com/image_magick/binaries/ImageMagick-6.6.2-10-Q16-windows-dll.exe
2. Download php_imagick.dll
http://valokuva.org/outside-blog-content/imagick-windows-builds/php53/imagick-2.3.0-dev/vc9_nts/php_imagick.dll
If you are using thread-safe php, please download
http://valokuva.org/outside-blog-content/imagick- windows-builds/php53/imagick-2.3.0-dev/vc9_zts/php_imagick.dll
3. Settings
Add
in php.iniextension=php_imagick.dll, restart web server
2. Install Imagick extension under Linux:
1.yum install ImageMagick
yum install ImageMagick ImageMagick-devel
2. Test whether the installation is successful
convert -version
3. Install imagick extension
01.wget http://pecl.php.net/get/imagick-3.1.0RC2.tgz02.tar xzvf imagick-3.1.0RC2.tgz03.cd imagick-3.1.0RC204.phpize05../configure06.make07.make install
4. Edit the php.ini file and add the following code at the end of the file
extension=imagick.so
5. Restart apache server
service httpd restart
3. Cases
1. Border processing
$image = new Imagick('test.jpg');
$color=new ImagickPixel();
$color->setColor("rgb(220,220,220)");
$image->borderImage($color,5,4);
$image->blurImage(5,5,imagick::CHANNEL_GREEN);
echo $image;
Let’s look at a simple example first
php_imagick program example
1. Create a thumbnail and display it
$image = new Imagick('image.jpg');
// If 0 is provided as a width or height parameter,// aspect ratio is maintained
$image->thumbnailImage(100, 0);
echo $image;
?>
2. Create a thumbnail in a directory and save it
foreach($images as $image) {
// Providing 0 forces thumbnailImage to maintain aspect ratio
$image->thumbnailImage(1024,0);
}
$images->writeImages();
?>
3. Thumbnail GIF animated pictures
$im = new Imagick("example.gif");
/* Resize all frames */
foreach ($im as $frame) {
/* 50x50 frames */
$frame->thumbnailImage(50, 50);
/* Set the virtual canvas to correct size */
$frame->setImagePage(50, 50, 0, 0);
}/* Notice writeImages instead of writeImage */
$im->writeImages("example_small.gif", true);
?>
Now let’s get to the point,
Example:
Crop/generate thumbnails/add watermark, automatically detect and process GIF
Calling method:
$image = new lib_image_imagick();
$image->open('a.gif');
$image->resize_to(100, 100, 'scale_fill');
$image->add_text('1024i.com', 10, 20);
$image->add_watermark('1024i.gif', 10, 50);
$image->save_to('x.gif');
imagick.class.php
class lib_image_imagick
{
private $image = null;
private $type = null;
// 构造函数
public function __construct(){}
// 析构函数
public function __destruct()
{
if($this->image!==null) $this->image->destroy();
}
// 载入图像
public function open($path)
{
$this->image = new Imagick( $path );
if($this->image)
{
$this->type = strtolower($this->image->getImageFormat());
}
return $this->image;
}
public function crop($x=0, $y=0, $width=null, $height=null)
{
if($width==null) $width = $this->image->getImageWidth()-$x;
if($height==null) $height = $this->image->getImageHeight()-$y;
if($width<=0 || $height<=0) return;
if($this->type=='gif')
{
$image = $this->image;
$canvas = new Imagick();
$images = $image->coalesceImages();
foreach($images as $frame){
$img = new Imagick();
$img->readImageBlob($frame);
$img->cropImage($width, $height, $x, $y);
$canvas->addImage( $img );
$canvas->setImageDelay( $img->getImageDelay() );
$canvas->setImagePage($width, $height, 0, 0);
}
$image->destroy();
$this->image = $canvas;
}
else
{
$this->image->cropImage($width, $height, $x, $y);
}
}
/*
* 更改图像大小
$fit: 适应大小方式
'force': 把图片强制变形成 $width X $height 大小
'scale': 按比例在安全框 $width X $height 内缩放图片, 输出缩放后图像大小 不完全等于 $width X $height
'scale_fill': 按比例在安全框 $width X $height 内缩放图片，安全框内没有像素的地方填充色, 使用此参数时可设置背景填充色 $bg_color = array(255,255,255)(红,绿,蓝, 透明度) 透明度(0不透明-127完全透明))
其它: 智能模能 缩放图像并载取图像的中间部分 $width X $height 像素大小
$fit = 'force','scale','scale_fill' 时： 输出完整图像
$fit = 图像方位值 时, 输出指定位置部分图像
字母与图像的对应关系如下:
north_west north north_east
west center east
south_west south south_east
*/
public function resize_to($width = 100, $height = 100, $fit = 'center', $fill_color = array(255,255,255,0) )
{
switch($fit)
{
case 'force':
if($this->type=='gif')
{
$image = $this->image;
$canvas = new Imagick();
$images = $image->coalesceImages();
foreach($images as $frame){
$img = new Imagick();
$img->readImageBlob($frame);
$img->thumbnailImage( $width, $height, false );
$canvas->addImage( $img );
$canvas->setImageDelay( $img->getImageDelay() );
}
$image->destroy();
$this->image = $canvas;
}
else
{
$this->image->thumbnailImage( $width, $height, false );
}
break;
case 'scale':
if($this->type=='gif')
{
$image = $this->image;
$images = $image->coalesceImages();
$canvas = new Imagick();
foreach($images as $frame){
$img = new Imagick();
$img->readImageBlob($frame);
$img->thumbnailImage( $width, $height, true );
$canvas->addImage( $img );
$canvas->setImageDelay( $img->getImageDelay() );
}
$image->destroy();
$this->image = $canvas;
}
else
{
$this->image->thumbnailImage( $width, $height, true );
}
break;
case 'scale_fill':
$size = $this->image->getImagePage();
$src_width = $size['width'];
$src_height = $size['height'];
$x = 0;
$y = 0;
$dst_width = $width;
$dst_height = $height;
if($src_width*$height > $src_height*$width)
{
$dst_height = intval($width*$src_height/$src_width);
$y = intval( ($height-$dst_height)/2 );
}
else
{
$dst_width = intval($height*$src_width/$src_height);
$x = intval( ($width-$dst_width)/2 );
}
$image = $this->image;
$canvas = new Imagick();
$color = 'rgba('.$fill_color[0].','.$fill_color[1].','.$fill_color[2].','.$fill_color[3].')';
if($this->type=='gif')
{
$images = $image->coalesceImages();
foreach($images as $frame)
{
$frame->thumbnailImage( $width, $height, true );
$draw = new ImagickDraw();
$draw->composite($frame->getImageCompose(), $x, $y, $dst_width, $dst_height, $frame);
$img = new Imagick();
$img->newImage($width, $height, $color, 'gif');
$img->drawImage($draw);
$canvas->addImage( $img );
$canvas->setImageDelay( $img->getImageDelay() );
$canvas->setImagePage($width, $height, 0, 0);
}
}
else
{
$image->thumbnailImage( $width, $height, true );
$draw = new ImagickDraw();
$draw->composite($image->getImageCompose(), $x, $y, $dst_width, $dst_height, $image);
$canvas->newImage($width, $height, $color, $this->get_type() );
$canvas->drawImage($draw);
$canvas->setImagePage($width, $height, 0, 0);
}
$image->destroy();
$this->image = $canvas;
break;
default:
$size = $this->image->getImagePage();
$src_width = $size['width'];
$src_height = $size['height'];
$crop_x = 0;
$crop_y = 0;
$crop_w = $src_width;
$crop_h = $src_height;
if($src_width*$height > $src_height*$width)
{
$crop_w = intval($src_height*$width/$height);
}
else
{
$crop_h = intval($src_width*$height/$width);
}
switch($fit)
{
case 'north_west':
$crop_x = 0;
$crop_y = 0;
break;
case 'north':
$crop_x = intval( ($src_width-$crop_w)/2 );
$crop_y = 0;
break;
case 'north_east':
$crop_x = $src_width-$crop_w;
$crop_y = 0;
break;
case 'west':
$crop_x = 0;
$crop_y = intval( ($src_height-$crop_h)/2 );
break;
case 'center':
$crop_x = intval( ($src_width-$crop_w)/2 );
$crop_y = intval( ($src_height-$crop_h)/2 );
break;
case 'east':
$crop_x = $src_width-$crop_w;
$crop_y = intval( ($src_height-$crop_h)/2 );
break;
case 'south_west':
$crop_x = 0;
$crop_y = $src_height-$crop_h;
break;
case 'south':
$crop_x = intval( ($src_width-$crop_w)/2 );
$crop_y = $src_height-$crop_h;
break;
case 'south_east':
$crop_x = $src_width-$crop_w;
$crop_y = $src_height-$crop_h;
break;
default:
$crop_x = intval( ($src_width-$crop_w)/2 );
$crop_y = intval( ($src_height-$crop_h)/2 );
}
$image = $this->image;
$canvas = new Imagick();
if($this->type=='gif')
{
$images = $image->coalesceImages();
foreach($images as $frame){
$img = new Imagick();
$img->readImageBlob($frame);
$img->cropImage($crop_w, $crop_h, $crop_x, $crop_y);
$img->thumbnailImage( $width, $height, true );
$canvas->addImage( $img );
$canvas->setImageDelay( $img->getImageDelay() );
$canvas->setImagePage($width, $height, 0, 0);
}
}
else
{
$image->cropImage($crop_w, $crop_h, $crop_x, $crop_y);
$image->thumbnailImage( $width, $height, true );
$canvas->addImage( $image );
$canvas->setImagePage($width, $height, 0, 0);
}
$image->destroy();
$this->image = $canvas;
}
}
// 添加水印图片
public function add_watermark($path, $x = 0, $y = 0)
{
$watermark = new Imagick($path);
$draw = new ImagickDraw();
$draw->composite($watermark->getImageCompose(), $x, $y, $watermark->getImageWidth(), $watermark->getimageheight(), $watermark);
if($this->type=='gif')
{
$image = $this->image;
$canvas = new Imagick();
$images = $image->coalesceImages();
foreach($image as $frame)
{
$img = new Imagick();
$img->readImageBlob($frame);
$img->drawImage($draw);
$canvas->addImage( $img );
$canvas->setImageDelay( $img->getImageDelay() );
}
$image->destroy();
$this->image = $canvas;
}
else
{
$this->image->drawImage($draw);
}
}
// 添加水印文字
public function add_text($text, $x = 0 , $y = 0, $angle=0, $style=array())
{
$draw = new ImagickDraw();
if(isset($style['font'])) $draw->setFont($style['font']);
if(isset($style['font_size'])) $draw->setFontSize($style['font_size']);
if(isset($style['fill_color'])) $draw->setFillColor($style['fill_color']);
if(isset($style['under_color'])) $draw->setTextUnderColor($style['under_color']);
if($this->type=='gif')
{
foreach($this->image as $frame)
{
$frame->annotateImage($draw, $x, $y, $angle, $text);
}
}
else
{
$this->image->annotateImage($draw, $x, $y, $angle, $text);
}
}
// 保存到指定路径
public function save_to( $path )
{
if($this->type=='gif')
{
$this->image->writeImages($path, true);
}
else
{
$this->image->writeImage($path);
}
}
// 输出图像
public function output($header = true)
{
if($header) header('Content-type: '.$this->type);
echo $this->image->getImagesBlob();
}
public function get_width()
{
$size = $this->image->getImagePage();
return $size['width'];
}
public function get_height()
{
$size = $this->image->getImagePage();
return $size['height'];
}
// 设置图像类型， 默认与源类型一致
public function set_type( $type='png' )
{
$this->type = $type;
$this->image->setImageFormat( $type );
}
// 获取源图像类型
public function get_type()
{
return $this->type;
}
// 当前对象是否为图片
public function is_image()
{
if( $this->image )
return true;
else
return false;
}
public function thumbnail($width = 100, $height = 100, $fit = true){ $this->image->thumbnailImage( $width, $height, $fit );} // 生成缩略图 $fit为真时将保持比例并在安全框 $width X $height 内生成缩略图片
/*
添加一个边框
$width: 左右边框宽度
$height: 上下边框宽度
$color: Color: RGB color 'rgb(255,0,0)' or hexadecimal color '#FF0000' or color word 'white'/'red'...
*/
public function border($width, $height, $color='rgb(220, 220, 220)')
{
$color=new ImagickPixel();
$color->setColor($color);
$this->image->borderImage($color, $width, $height);
}
public function blur($radius, $sigma){$this->image->blurImage($radius, $sigma);} // Blur
public function gaussian_blur($radius, $sigma){$this->image->gaussianBlurImage($radius, $sigma);} // Gaussian blur
public function motion_blur($radius, $sigma, $angle){$this->image->motionBlurImage($radius, $sigma, $angle);} // Motion blur
public function radial_blur($radius){$this->image->radialBlurImage($radius);} // Radial blur
public function add_noise($type=null){$this->image->addNoiseImage($type==null?imagick::NOISE_IMPULSE:$type);} // Add noise
public function level($black_point, $gamma, $white_point){$this->image->levelImage($black_point, $gamma, $white_point);} // Adjust the color level
public function modulate($brightness, $saturation, $hue){$this->image->modulateImage($brightness, $saturation, $hue);} // Adjust brightness, saturation, hue
public function charcoal($radius, $sigma){$this->image->charcoalImage($radius, $sigma);} // Sketch
public function oil_paint($radius){$this->image->oilPaintImage($radius);} // Oil painting effect
public function flop(){$this->image->flopImage();} // Flip horizontally
public function flip(){$this->image->flipImage();} // Vertical flip
}
I hope this article will be helpful to everyone’s PHP programming design.