Question

我希望在调整图像大小时保持图像的宽高比。我有94000张图片需要在社交网站上显示为预览图像。我遇到的挑战是一些用户上传了全长照片，结果他们在重新调整大小后显得很紧张。我正在使用codeigniter来实现这一点。文件名位于数据库表中。这是我正在使用的代码

if (file_exists($_SERVER["DOCUMENT_ROOT"]."/uploads/profiles    /purchased_profiles/".$images_->_file_name)) {
    //echo "The file $filename exists";

    $thumb = new Imagick();

    $thumb->readImage($_SERVER["DOCUMENT_ROOT"]."/uploads/profiles/purchased_profiles/".$images_->_file_name); 
    $orientation = $thumb->getImageOrientation(); 

    switch($orientation) { 
        case imagick::ORIENTATION_BOTTOMRIGHT: 
            $thumb->rotateimage("#000", 180); // rotate 180 degrees 
        break; 

        case imagick::ORIENTATION_RIGHTTOP: 
            $thumb->rotateimage("#000", 90); // rotate 90 degrees CW 
        break; 

        case imagick::ORIENTATION_LEFTBOTTOM: 
            $thumb->rotateimage("#000", -90); // rotate 90 degrees CCW 
        break; 
    }
    $thumb->resizeImage(160,160,Imagick::FILTER_LANCZOS,1);

    $thumb->writeImage($_SERVER["DOCUMENT_ROOT"]."/uploads/profiles/purchased_profiles/160x160/".$images_->_file_name);
    $thumb->clear();
    $thumb->destroy(); 
}

Answer 1

如果上传的图片尺寸不同，那么这是一个真正的挑战如果我要将此处的解决方案how do i use imagick in php? (resize & crop)和您的代码结合起来，我可能会提出以下内容

      if (file_exists($_SERVER["DOCUMENT_ROOT"]."/uploads/profiles/purchased_profiles/".$images_->_file_name)) {



        $thumb = new Imagick();

       $thumb->readImage($_SERVER["DOCUMENT_ROOT"]."/uploads/profiles/purchased_profiles/".$images_->_file_name); 

$orientation = $thumb->getImageOrientation(); 

switch($orientation) { 
    case imagick::ORIENTATION_BOTTOMRIGHT: 
        $thumb->rotateimage("#000", 180); // rotate 180 degrees 
    break; 

    case imagick::ORIENTATION_RIGHTTOP: 
        $thumb->rotateimage("#000", 90); // rotate 90 degrees CW 
    break; 

    case imagick::ORIENTATION_LEFTBOTTOM: 
        $thumb->rotateimage("#000", -90); // rotate 90 degrees CCW 
    break; 
}

          //now check the width
        $width=$thumb->getImageWidth();

        //now check height
        $height=$thumb->getImageHeight();

       if ($height>$width) {

         $new_height=160;
         $new_width=(int)($width/$height*160);

         $thumb->resizeImage($new_width,$new_height,Imagick::FILTER_LANCZOS,1);

         $cropWidth = $thumb->getImageWidth();
         $cropHeight = $thumb->getImageHeight();
      $cropZoom=1;

     if ($cropZoom) {
       $newWidth = $cropWidth / 2;
       $newHeight = $cropHeight / 2;

    $thumb->cropimage(
        $new_width,
        $new_width,
        0,
        0
    );


      }
   } 
     elseif ($width>$height) {
     # code...

        $new_width=160;

        $new_height=(int)($height/$width*160);

       $thumb->resizeImage($new_width,$new_height,Imagick::FILTER_LANCZOS,1);
         }
       else{

        $thumb->resizeImage(160,160,Imagick::FILTER_LANCZOS,1);
        }   



           $thumb->writeImage($_SERVER["DOCUMENT_ROOT"]."/uploads/profiles/purchased_profiles/160x160/".$images_->_file_name);
        $thumb->clear();
       $thumb->destroy(); }

如果图像高度大于宽度，您可能需要裁剪，所以我决定裁剪尺寸等于从左到右角的宽度，很可能你不会错过这样的人脸。祝你好运

Imagick照片多个图像调整大小裁剪没有扭曲/拉伸PHP

1 个答案: