Convert rewrite from apache to nginx

Hello,

I have this .htaccess file in my apache configuration:
RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -l [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^.* - [L]

RewriteRule ^(.*)/(.*)_image.jpg http://example.com/page.html [L]
RewriteRule ^(.*)/(.*)_(.*).jpg http://example.com/page.html [L]

Can you please convert this rules to nginx? Thanks.