In my Laravel web-application I make use of the Intervention Image library. I'm saving three versions of the uploaded image: 'original'
, '500_auto'
and a custom size image.
$image = Image::make(Input::file('file');
// Save the orignal image
$image->save($folder . 'original.' . $extension);
// Save 500_auto image
$image->resize(500, null, function($constraint) {
$constraint->aspectRatio();
});
$image->save($folder . '500_auto.' . $extension, 100);
// Check if size is set
if (isset($config->images->width) && isset($config->images->height)) {
// Assign values
$width = $config->images->width;
$height = $config->images->height;
// Create the custom thumb
$image->resize($width, $height, function($constraint) {
$constraint->aspectRatio();
});
$image->save($folder . $width . '_' . $height . '.' . $extension, 100);
}
The driver of Intervention is set in the config as 'gd'
:
'driver' => 'gd'
This is the image I'm uploading: original.jpg
And this is the result from the custom thumb with the config settings set to exact the original sizes (1800 x 586): 1800_586.jpg
As you can see the second image there is a lot of quality loss in the resized image. How can I fix this?
You're first resizing the image to a small format, then you take the small image and resize that to the original size again. If you reverse the order, you'll go from original size -> original size -> small size instead.
Personally, I usually prefer to redo the Image::make()
call for every new image, just to make sure I don't screw something like this up along the way.
You can use "backup()" method to save the object's status and "reset()" method to return back to backup state:
// create an image
$img = Image::make('public/foo.jpg');
// backup status
$img->backup();
// perform some modifications
$img->resize(320, 240);
$img->invert();
$img->save('public/small.jpg');
// reset image (return to backup state)
$img->reset();
// perform other modifications
$img->resize(640, 480);
$img->invert();
$img->save('public/large.jpg');
more info on this page: http://image.intervention.io/api/reset
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