Canon DSLRs appear to save photos in landscape orientation and uses exif::orientation
to do the rotation.
佳能数码单反相机似乎以横向方向保存照片,并使用exif :: orientation进行旋转。
Question: How can imagemagick be used to re-save the image into the intended orientation using the exif orientation data such that it no longer requires the exif data to display in the correct orientation?
问题:如何使用imagemagick将图像重新保存到预期的方向,使用exif方向数据,以便它不再需要exif数据以正确的方向显示?
2 个解决方案
#1
78
You could use the auto-orient option of convert to do this.
您可以使用转换的自动定向选项来执行此操作。
convert your-image.jpg -auto-orient output.jpg
#2
32
The PHP Imagick way would be to test the image orientation and rotate/flip the image accordingly:
PHP Imagick的方法是测试图像方向并相应地旋转/翻转图像:
function autorotate(Imagick $image)
{
switch ($image->getImageOrientation()) {
case Imagick::ORIENTATION_TOPLEFT:
break;
case Imagick::ORIENTATION_TOPRIGHT:
$image->flopImage();
break;
case Imagick::ORIENTATION_BOTTOMRIGHT:
$image->rotateImage("#000", 180);
break;
case Imagick::ORIENTATION_BOTTOMLEFT:
$image->flopImage();
$image->rotateImage("#000", 180);
break;
case Imagick::ORIENTATION_LEFTTOP:
$image->flopImage();
$image->rotateImage("#000", -90);
break;
case Imagick::ORIENTATION_RIGHTTOP:
$image->rotateImage("#000", 90);
break;
case Imagick::ORIENTATION_RIGHTBOTTOM:
$image->flopImage();
$image->rotateImage("#000", 90);
break;
case Imagick::ORIENTATION_LEFTBOTTOM:
$image->rotateImage("#000", -90);
break;
default: // Invalid orientation
break;
}
$image->setImageOrientation(Imagick::ORIENTATION_TOPLEFT);
return $image;
}
The function might be used like this:
该函数可能像这样使用:
$img = new Imagick('/path/to/file');
autorotate($img);
$img->stripImage(); // if you want to get rid of all EXIF data
$img->writeImage();
#1
78
You could use the auto-orient option of convert to do this.
您可以使用转换的自动定向选项来执行此操作。
convert your-image.jpg -auto-orient output.jpg
#2
32
The PHP Imagick way would be to test the image orientation and rotate/flip the image accordingly:
PHP Imagick的方法是测试图像方向并相应地旋转/翻转图像:
function autorotate(Imagick $image)
{
switch ($image->getImageOrientation()) {
case Imagick::ORIENTATION_TOPLEFT:
break;
case Imagick::ORIENTATION_TOPRIGHT:
$image->flopImage();
break;
case Imagick::ORIENTATION_BOTTOMRIGHT:
$image->rotateImage("#000", 180);
break;
case Imagick::ORIENTATION_BOTTOMLEFT:
$image->flopImage();
$image->rotateImage("#000", 180);
break;
case Imagick::ORIENTATION_LEFTTOP:
$image->flopImage();
$image->rotateImage("#000", -90);
break;
case Imagick::ORIENTATION_RIGHTTOP:
$image->rotateImage("#000", 90);
break;
case Imagick::ORIENTATION_RIGHTBOTTOM:
$image->flopImage();
$image->rotateImage("#000", 90);
break;
case Imagick::ORIENTATION_LEFTBOTTOM:
$image->rotateImage("#000", -90);
break;
default: // Invalid orientation
break;
}
$image->setImageOrientation(Imagick::ORIENTATION_TOPLEFT);
return $image;
}
The function might be used like this:
该函数可能像这样使用:
$img = new Imagick('/path/to/file');
autorotate($img);
$img->stripImage(); // if you want to get rid of all EXIF data
$img->writeImage();