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();
$thumb->destroy();
}
如果图像上传的大小不同,那将是一个真正的挑战如果我要结合这里找到的解决方案how do i use imagick in php? (resize & crop)和你的代码,我可能会想出以下内容
if (file_exists($_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,您可能需要进行裁剪,因此我决定裁剪尺寸等于从左到右角的宽度,很可能您不会错过这样的人脸。祝好运