Add <img> tag to WordPress data elements

add-img-tag-wp_kses_data.php

/*
 * Adds the <img> tag to allowed tags in fields sanitized using the wp_kses_data function.
 *
 * This particularly helps with adding images to Compare Table Features for individual products
 */
add_filter( 'wp_kses_allowed_html', 'my_kses_allowed_html_hook', 23, 2 );
function my_kses_allowed_html_hook( $allowed_tags, $context = null ){
	if ( 'post' == $context && ! isset( $allowed_tags['img'] ) ) {
        $allowed_tags['img'] = array(
          'alt'     => true,
          'align'   => true,
          'border'  => true,
          'height'  => true,
          'src'     => true,
          'width'   => true,
          'class'   => true,
          'id'      => true,
          'style'   => true,
          'title'   => true,
        );
	}
	
	return $allowed_tags;
}