Resize crop images

gistfile1.nginxconf

        location /resize {
                alias /tmp/nginx/resize;
                set $width 150;
                set $height 100;
                set $dimens "";

                if ($uri ~* "^/resize_(\d+)x(\d+)/(.*)" ) {
                        set $width  $1;
                        set $height $2;
                        set $image_path $3;
                        set $demins "_$1x$2";
                }
                if ($uri ~* "^/resize/(.*)" ) {
                        set $image_path $1;
                }
                set $image_uri image_resize/$image_path?width=$width&height=$height;

                if (!-f $request_filename) {
                        proxy_pass http://127.0.0.1:8080/$image_uri;
                        break;
                }

                proxy_store          /tmp/nginx/resize$demins/$image_path;
                proxy_store_access   user:rw  group:rw  all:r;
                proxy_temp_path      /tmp/images;
                proxy_set_header     Host $host;
        }

        location /image_resize {
                alias /path/to/media/;
                image_filter resize $arg_width $arg_height;
                image_filter_jpeg_quality 75;
                allow 127.0.0.0/8;
                deny all;
        }