Allow HTML img tags in WordPress comments

wp-allow-img-in-comments.php

<?php
add_filter( 'wp_kses_allowed_html', array( $this, 'my_kses_allowed_html_hook' ), 20, 2 );

function my_kses_allowed_html_hook( $tags, $context = null ){
	if ( 'post' == $context && ! isset( $tags['img'] ) ) {
		$tags['img'] = array(
			'src' => 1,
			'height' => 1,
			'width' => 1,
			'alt' => 1,
			'title' => 1
		);
	}
	
	return $tags;
}