WordPress at a glance
filter is not described

image_size_names_choose filter-hook . WP 1.0

This filter is documented in wp-admin/includes/media.php

Usage

add_filter( 'image_size_names_choose', 'filter_function_name_1630' );
function filter_function_name_1630( $array ){
	// filter...

	return $array;
}
$array
-

Where the hook is called

wp_prepare_attachment_for_js()
image_size_names_choose
wp_print_media_templates()
image_size_names_choose
Custom_Background::wp_set_background_image()
image_size_names_choose
image_size_input_fields()
image_size_names_choose
wp-includes/media.php 3913-3921
$possible_sizes = apply_filters(
	'image_size_names_choose',
	array(
		'thumbnail' => __( 'Thumbnail' ),
		'medium'    => __( 'Medium' ),
		'large'     => __( 'Large' ),
		'full'      => __( 'Full Size' ),
	)
);
wp-includes/media-template.php 851-859
$sizes = apply_filters(
	'image_size_names_choose',
	array(
		'thumbnail' => __( 'Thumbnail' ),
		'medium'    => __( 'Medium' ),
		'large'     => __( 'Large' ),
		'full'      => __( 'Full Size' ),
	)
);
wp-includes/media-template.php 931-939
$size_names = apply_filters(
	'image_size_names_choose',
	array(
		'thumbnail' => __( 'Thumbnail' ),
		'medium'    => __( 'Medium' ),
		'large'     => __( 'Large' ),
		'full'      => __( 'Full Size' ),
	)
);
wp-includes/media-template.php 1122-1130
$sizes = apply_filters(
	'image_size_names_choose',
	array(
		'thumbnail' => __( 'Thumbnail' ),
		'medium'    => __( 'Medium' ),
		'large'     => __( 'Large' ),
		'full'      => __( 'Full Size' ),
	)
);
wp-admin/includes/class-custom-background.php 594-602
apply_filters(
	'image_size_names_choose',
	array(
		'thumbnail' => __( 'Thumbnail' ),
		'medium'    => __( 'Medium' ),
		'large'     => __( 'Large' ),
		'full'      => __( 'Full Size' ),
	)
)
wp-admin/includes/media.php 1163-1171
$size_names = apply_filters(
	'image_size_names_choose',
	array(
		'thumbnail' => __( 'Thumbnail' ),
		'medium'    => __( 'Medium' ),
		'large'     => __( 'Large' ),
		'full'      => __( 'Full Size' ),
	)
);
wp-admin/edit-form-blocks.php 223-231
$image_size_names = apply_filters(
	'image_size_names_choose',
	array(
		'thumbnail' => __( 'Thumbnail' ),
		'medium'    => __( 'Medium' ),
		'large'     => __( 'Large' ),
		'full'      => __( 'Full Size' ),
	)
);

Where in WP core the hook is used WordPress

wp-admin/includes/ajax-actions.php 3892
add_filter( 'image_size_names_choose', array( $wp_site_icon, 'additional_sizes' ) );
wp-admin/includes/ajax-actions.php 3907
add_filter( 'image_size_names_choose', array( $wp_site_icon, 'additional_sizes' ) );