Change record status: 
Project: 
Introduced in branch: 
8.x
Introduced in version: 
8.0-ALPHA3
Description: 

Utility methods in image.inc were removed in favour of a classed image object.
A new service 'image.factory' was added for easy instantiation of image objects using the active image toolkit.

Drupal 7 Drupal 8
<?php
$image
= image_load($file->getUri());
?>
<?php
$image
= Drupal::service('image.factory')->get($file->getUri());
?>
<?php
image_get_info
($image);
?>
removed
<?php
image_save
($image);
?>
<?php
$image
->save();
?>
<?php
image_scale_and_crop
($image, $width, $height);
?>
<?php
$image
->scaleAndCrop($width, $height);
?>
<?php
image_scale
($image, $width, $height);
?>
<?php
$image
->scale($width, $height);
?>
<?php
image_resize
($image, $width, $height);
?>
<?php
$image
->resize($width, $height);
?>
<?php
image_rotate
($image, $degrees);
?>
<?php
$image
->rotate($degrees);
?>
<?php
image_crop
($image, $x, $y, $width, $height);
?>
<?php
$image
->crop($x, $y, $width, $height);
?>
<?php
image_desaturate
($image);
?>
<?php
$image
->desaturate();
?>
<?php
$info
= image_get_info($image);
$width = $info['width'];
?>
<?php
$width
= $image->getWidth();
?>
<?php
$info
= image_get_info($image);
$height = $info['height'];
?>
<?php
$height
= $image->getHeight();
?>
<?php
$info
= image_get_info($image);
$filesize = $info['filesize'];
?>
<?php
$filesize
= $image->getFilesize();
?>
N/A
<?php
$toolkit
= $image->getToolkit();
?>
N/A
<?php
$toolkit_id
= $image->getToolkitId();
?>
N/A
<?php
$image
->setSource($file->getUri());
?>
N/A
<?php
$source
= $image->getSource();
?>
<?php
$info
= image_get_info($image);
$extension = $info['extension'];
?>
<?php
$extension
= image_type_to_extension($image->getType(), FALSE);
?>
Impacts: 
Module developers
Updates Done (doc team, etc.)
Online documentation: 
Not done
Theming guide: 
Not done
Module developer documentation: 
Not done
Examples project: 
Not done
Coder Review: 
Not done
Coder Upgrade: 
Not done
Other: 
Other updates done