WordPress at a glance
filter is not described

image_size_names_choose filter-hook . WP 3.3.0

Filters the names and labels of the default image sizes.

Usage

add_filter( 'image_size_names_choose', 'filter_function_name_2624' );
function filter_function_name_2624( $size_names ){
	// filter...

	return $size_names;
}
$size_names(array)
Array of image sizes and their names.
Default: values include 'Thumbnail', 'Medium', 'Large', 'Full Size'

Where the hook is called

image_size_input_fields()
Custom_Background::wp_set_background_image()
wp_print_media_templates()
wp_prepare_attachment_for_js()
wp-admin/includes/media.php 1003-1008
$size_names = apply_filters( 'image_size_names_choose', array(
	'thumbnail' => __( 'Thumbnail' ),
	'medium'    => __( 'Medium' ),
	'large'     => __( 'Large' ),
	'full'      => __( 'Full Size' )
) );
wp-admin/edit-form-blocks.php 211-219
$image_size_names = apply_filters(
	'image_size_names_choose',
	array(
		'thumbnail' => __( 'Thumbnail' ),
		'medium'    => __( 'Medium' ),
		'large'     => __( 'Large' ),
		'full'      => __( 'Full Size' ),
	)
);
wp-admin/custom-background.php 547
$sizes = array_keys(apply_filters( 'image_size_names_choose', array('thumbnail' => __('Thumbnail'), 'medium' => __('Medium'), 'large' => __('Large'), 'full' => __('Full Size')) ));
wp-includes/media-template.php 693-698
$sizes = apply_filters( 'image_size_names_choose', array(
	'thumbnail' => __('Thumbnail'),
	'medium'    => __('Medium'),
	'large'     => __('Large'),
	'full'      => __('Full Size'),
) );
wp-includes/media-template.php 768-773
$size_names = apply_filters( 'image_size_names_choose', array(
	'thumbnail' => __( 'Thumbnail' ),
	'medium'    => __( 'Medium' ),
	'large'     => __( 'Large' ),
	'full'      => __( 'Full Size' ),
) );
wp-includes/media-template.php 942-947
$sizes = apply_filters( 'image_size_names_choose', array(
	'thumbnail' => __('Thumbnail'),
	'medium'    => __('Medium'),
	'large'     => __('Large'),
	'full'      => __('Full Size'),
) );
wp-includes/media.php 3178-3183
$possible_sizes = apply_filters( 'image_size_names_choose', array(
	'thumbnail' => __('Thumbnail'),
	'medium'    => __('Medium'),
	'large'     => __('Large'),
	'full'      => __('Full Size'),
) );

Where the hook is used (in WP core)

wp-admin/includes/ajax-actions.php 3254
add_filter( 'image_size_names_choose', array( $wp_site_icon, 'additional_sizes' ) );
wp-admin/includes/ajax-actions.php 3269
add_filter( 'image_size_names_choose', array( $wp_site_icon, 'additional_sizes' ) );