Add custom fields in attachment page

wp-custom-attachment-fields.php

<?php
add_action( 'attachment_fields_to_edit', array($this, 'tmx_attachment_fields_to_edit'), 10, 2 );

public function tmx_attachment_fields_to_edit( $form_fields, $post ){
	 // Apply only in image attachment pages	
   if( $post->post_mime_type == 'image/jpeg' || $post->post_mime_type == 'image/jpg' || $post->post_mime_type == 'image/png' ){
      
			$form_fields['tmx-apply-filter-sbutton'] = array(
				'label' => __('Add Image effects', 'themeaxe'),
				'input' => 'html',
				'helps' => __('Apply filter effects to image.', 'themeaxe'),
				'html' => '<a class="button easy-image-filters-button" href="'.admin_url('upload.php?page=easy-image-filters-page').'&attachment_id='.$post->ID.'">'.__('Add','themeaxe').'</a>',
			);
		}
 
		return $form_fields;
	}