nginx_imagefilte_resize.conf

# resize  /var/www/server.name/pics/image.jpg?h=100&w=100 to  /var/www/server.name/pics/100x100/image.jpg

server {
    listen       80;
    server_name  server.name;

    root /var/www/server.name;

    location /media/ {
        alias /var/www/server.name/pics/;
    }

    location ~ ^/resize/(?<imgpath>.*)$ {
        alias /var/www/server.name/pics/;
        try_files ${arg_w}x${arg_h}/$imgpath @resize;
    }

    location @resize {
        proxy_pass http://127.0.0.1/image_resize/$imgpath?w=$arg_w&h=$arg_h;
        proxy_store /var/www/server.name/pics/${arg_w}x${arg_h}/$imgpath;
        proxy_store_access   user:rw  group:rw  all:r;
        proxy_set_header     Host $host;
    }

    location /image_resize/ {
        alias /var/www/server.name/pics/;
        image_filter resize $arg_w $arg_h;
        image_filter_jpeg_quality 90;
        allow 127.0.0.0/8;
        deny all;
    }
}